789817-01

NI PS-25 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

## NI PS-25 POWER SUPPLY 

- AC 100-240 V Wide-Range Input 

- Width only 32 mm 

- Efficiency up to 94.3% 

- Excellent Partial Load Efficiency 

- 20% Output Power Reserves (PowerBoost) 

- Easy Fuse Breaking – three times nominal current for 12 ms 

- Safe Hiccup _[PLUS]_ Overload Mode 

- Active Power Factor Correction (PFC) 

- Minimal Inrush Current Surge 

- Full Power Between -25 °C and +60 °C 

- DC OK Relay Contact 

- 1 Year Warranty 

## PRODUCT DESCRIPTION 

## - SHORT FORM DATA 

The NI PS-25 is a cost optimized power supply without compromising quality, reliability, and performance. 

The NI PS-25 power supply comes with spring-clamp connection terminals, which are optimized for automated wiring. 

The most outstanding features of this unit are the small size, the high efficiency, the electronic inrush current limitation, active PFC, and the wide operational temperature range. The device also offers PowerBoost: power reserves of 20%, which may even be used continuously at temperatures up to +45 °C. Additionally, they can deliver three times the nominal output current for 12 ms, which helps to trip fuses on faulty output branches. 

High immunity to transients and power surges as well as low electromagnetic emission, a DC OK signal contact for remote monitoring, and a large international approval package for a variety of applications make this unit suitable for nearly every situation. 

|Output voltage|DC 24 V|Nominal|
|---|---|---|
|Adjustment range|24–28 V|Factorysetting24.1 V|
|Output current|5.0–4.3 A|Up to +60 °C ambient|
||3.8–3.2 A|At +70 °C ambient|
|PowerBoost|Derate linearly between +60 °C and +70 °C<br>6.0 A<br>Up to +45 °C ambient||
||Linear decrease to nominal power between<br>+45 °C and +60 °C|Linear decrease to nominal power between|
|Input voltage AC|AC 100–240 V|-15%/+10%|
|Mains frequency|50–60 Hz|±6%|
|Input current AC|1.09/0.6 A|At 120/230 Vac|
|Power factor<br>Input voltage DC<br>Input current DC|0.98/0.91<br>DC 110–150 V±20%<br>1.21 A|At 120/230 Vac<br>At 110 Vdc|
|AC Inrush current|5/6 Apeak|At 120/230 Vac|
|Efficiency|93.6/94.3%|At 120/230 Vac|
|Losses|8.2/7.3 W|At 120/230 Vac|
|Hold-uptime|35/35 ms|At 120/230 Vac|
|Temperature range|-25 °C to +70 °C||
|Size (WxHxD)|32 x 124 x 102 mm|32 x 124 x 102 mm<br>Without DIN rail|
|Weight|440g||



## ORDER NUMBERS 

Power Supply NI PS-25 Accessory 199429-01 Side mounting kit for NI PS-25 

## MAIN APPROVALS 

For details and the complete approval list, see section 19. 

UL 61010-2-201 Class I Div 2 

October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load, 25 °C ambient and after a 5 minute run-in time unless otherwise noted. 

1/21 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

## NI PS-25 

## TABLE OF CONTENTS 

|TABLE OF CONTENTSABLE OF CONTENTS|TABLE OF CONTENTSABLE OF CONTENTSCONTENTSONTENTS|||
|---|---|---|---|
||Page||Page|
|1.|Intended Use ................................................................ 3|18. Dielectric Strength ..................................................... 14||
|2.|Installation Instructions ................................................ 3|19. Approved, Fulfilled or Tested Standards .................... 15||
|3.|AC-Input ....................................................................... 4|20. Regulatory Product Compliance ................................ 15||
|4.|DC-Input ....................................................................... 5|21. Physical Dimensions and Weight ............................... 16||
|5.|Input Inrush Current ..................................................... 6|22. Accessories ................................................................. 17||
|6.|Output .......................................................................... 6|22.1.|Side Mounting Bracket ..................................... 17|
|7.|Hold-up Time ................................................................ 7|23. Application Notes ....................................................... 17||
|8.|DC OK Relay Contact .................................................... 8|23.1.|Peak Current Capability .................................... 17|
|9.|Efficiency and Power Losses ......................................... 9|23.2.|Charging of Batteries ........................................ 18|
|10.|Functional Diagram .................................................... 10|23.3.|Series Operation ............................................... 19|
|11.|Front Side and User Elements .................................... 10|23.4.|Parallel Use to Increase Output Power ............ 19|
|12.|Connection Terminals ................................................ 11|23.5.|Parallel Use for Redundancy ............................ 19|
|13.|Lifetime Expectancy ................................................... 11|23.6.|Operation on Two Phases ................................ 20|
|14.|MTBF .......................................................................... 11|23.7.|Use in a Tightly Sealed Enclosure ..................... 20|
|15.|EMC ............................................................................ 12|23.8.|Mounting Orientations ..................................... 20|
|16.|Environment ............................................................... 13|||
|17.|Safety and Protection Features .................................. 14|||



The information given in this document is correct to the best of our knowledge and experience at the time of publication. If not expressly agreed otherwise, this information does not represent a warranty in the legal sense of the word. As the state of our knowledge and experience is constantly changing, the information in this data sheet is subject to revision. 

No part of this document may be reproduced or utilized in any form without our prior permission in writing. 

Packaging and packaging aids can and should always be recycled. The product itself may not be disposed of as domestic refuse. 

## TERMINOLOGY AND ABREVIATIONS 

**PE and symbol** PE is the abbreviation for **P** rotective **E** arth and has the same meaning as the symbol . **Earth, Ground** This document uses the term “earth” which is the same as the U.S. term “ground”. **t.b.d.** To be defined, value or description will follow later. **AC 230 V** A figure displayed with the AC or DC before the value represents a nominal voltage with standard tolerances (usually ±15%) included. For example: DC 12 V describes a 12 V battery disregarding whether it is full (13.7 V) or flat (10 V) **230 Vac** A figure with the unit (Vac) at the end is a momentary figure without any additional tolerances included. **50 Hz vs. 60 Hz** As long as not otherwise stated, AC 230 V parameters are valid at 50 Hz mains frequency. **may** A key word indicating flexibility of choice with no implied preference. **shall** A key word indicating a mandatory requirement. **should** A key word indicating flexibility of choice with a strongly preferred implementation. 

October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load, 25 °C ambient and after a 5 minute run-in time unless otherwise noted. 

2/21 

NI PS-25 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 1. INTENDED USE ~~ee~~ This device is designed for installation in an enclosure and is intended for commercial use, such as in industrial control, process control, monitoring, measurement, audio/video, information or communication equipment, or the like. 

Do not use this device in equipment where malfunctioning may cause severe personal injury or threaten human life without additional appropriate safety devices that are suited for the end-application. If this device is used in a manner outside of its specification, the protection provided by the device may be impaired. 2. INSTALLATION INSTRUCTIONS **WARNING[Risk of electrical shock, fire, personal injury or death.]** - Turn power off before working on the device and protect against inadvertent repowering. - Do not open, modify, or repair the device. - Use caution to prevent any foreign objects from entering into the housing. - Do not use in wet locations or in areas where moisture or condensation can be expected. - Do not touch during power-on, and immediately after power-off. Hot surface may cause burns. Obey the following installation instructions: This device may only be installed and put into operation by qualified personnel. This device does not contain serviceable parts. The tripping of an internal fuse is caused by an internal defect. If damage or malfunction should occur during installation or operation, immediately turn power off and send unit to the factory for inspection. Install device in an enclosure providing protection against electrical, mechanical, and fire hazards. Install the device onto a DIN rail according to EN 60715 with the input terminals on the bottom and the output terminals on the top of the device. Other mounting orientations require a reduction in output current. Make sure that the wiring is correct by following all local and national codes. Use appropriate copper cables that are designed for a minimum operating temperature of 60 °C for ambient temperatures up to +45 °C, 75 °C for ambient temperatures up to +60 °C, and 90 °C for ambient temperatures up to +70 °C. Ensure that all strands of a stranded wire enter the terminal connection. Use ferrules for wires on the input terminals. The device is designed for pollution degree 2 areas in controlled environments. No condensation or frost is allowed. The enclosure of the device provides a degree of protection of IP20. The housing does not provide protection against spilled liquids. The isolation of the device is designed to withstand impulse voltages of overvoltage category III according to IEC 60664-1. The device is designed as “Class of Protection I” equipment according to IEC 61140. Do not use without a proper PE (Protective Earth) connection. The device is suitable to be supplied from TN, TT, or IT mains networks. The continuous voltage between the input terminal and the PE potential must not exceed 300 Vac. The input can also be powered from batteries or similar DC sources. The continuous voltage between the supply voltage and the PE/ground potential must not exceed 360 Vdc. A disconnecting means shall be provided for the input of the device. The device is designed for convection cooling and does not require an external fan. Do not obstruct airflow and do not cover ventilation grid! The device is designed for altitudes up to 5000 m. Above 2000 m, a reduction in output current and over voltage category is required. Keep the following minimum installation clearances: 40 mm on top, 20 mm on the bottom, and 5 mm left and right side. Increase the 5 mm to 15 mm in case the adjacent device is a heat source. When the device is permanently loaded with less than 50%, the 5 mm can be reduced to zero. 25 °C ambient and after a 5 minute run-in time unless otherwise noted. October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load, 3/21 ~~_~~ 

NI PS-25 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

The device is designed, tested, and approved for branch circuits up to 32 A (IEC) and 30 A (UL) without an additional protection device. If an external fuse is utilized, do not use circuit breakers smaller than 6 A B- or C-Characteristic to avoid a nuisance tripping of the circuit breaker. 

The maximum surrounding air temperature is +70 °C. The operational temperature is the same as the ambient or surrounding air temperature and is defined 2 cm below the device. 

The device is designed to operate in areas between 5% and 95% relative humidity. 

## **Installation Instructions for Hazardous Location Areas** 

The device is suitable for use in Class I Division 2 Groups A, B, C, D locations. 

## **WARNING** 

## **EXPLOSION HAZARDS!** 

Installation in standard mounting orientation with the input terminals on the bottom of the unit. For non-standard mounting orientations, a reduction of output current is required. 

Do not disconnect the device or operate the voltage adjustment unless power has been switched off or the area is known to be nonhazardous. 

A suitable enclosure must be provided for the end product. 

## 3. AC-INPUT 

The device is suitable to be supplied from TN, TT, or IT mains networks with AC voltage. For suitable DC supply voltages, see section 4. 

|AC input|Nom.|AC 100–240 V||
|---|---|---|---|
|AC input range||85–264 Vac||
|||264–300 Vac|Occasionallyfor maximal 500 ms|
|Allowed voltage L or N to earth|Max.|300 Vac|Continuous, accordingto IEC 60664-1|
|Input frequency|Nom.|50–60 Hz|±6%|
|Turn-on voltage|Typ.|80 Vac|Steady-state value, see Fig. 3-1|
|Shut-down voltage|Typ.|74 Vac|Steady-state value, see Fig. 3-1|
|External inputprotection|See recommendations in section 2.||See recommendations in section 2.|



|||**AC 100 V**|**AC 120 V**|**AC 230 V**||
|---|---|---|---|---|---|
|Input current|Typ.|1.30 A|1.09 A|0.60 A|At 24 V,5 A,see Fig. 3-3|
|Power factor|Typ.|0.99|0.98|0.91|At 24 V,5 A,see Fig. 3-4|
|Crest factor|Typ.|1.7|1.8|2.2|At 24 V, 5 A, the crest factor is the|
||||||mathematical ratio of the peak value to|
||||||RMS value of the input current|
||||||waveform.|
|Start-up delay|Typ.|420 ms|380 ms|385 ms|See Fig. 3-2|
|Rise time|Typ.|80 ms|80 ms|80 ms|At 24 V, 5 A const. current load, 0 mF|
||||||load capacitance, see Fig. 3-2|
||Typ.|100 ms|100 ms|110 ms|At 24 V, 5 A const. current load, 5 mF|
||||||load capacitance, see Fig. 3-2|
|Turn-on overshoot|Max.|200 mV|200 mV|200 mV|See Fig. 3-2|



October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load, 25 °C ambient and after a 5 minute run-in time unless otherwise noted. 

pS 

4/21 

NI PS-25 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

**==> picture [173 x 252] intentionally omitted <==**

**----- Start of picture text -----**<br>
Fig. 3-1    Input voltage range<br>Rated<br>POUT input range max.<br>500ms<br>Nl<br>| | |<br>VIN<br>|__|<br>85V 264V 300Vac<br>Fig. 3-3    Input current vs. output current at 24 V output<br>voltage<br>Input Current, typ.<br>1.5A (a)<br>1.25 (b)<br>a) 100Vac<br>1.0 b) 120Vac<br>c) 230Vac<br>0.75 ( c)<br>0.5<br>0.25<br>Output Current<br>0<br>0.5 1 2 3 4 5 6A<br>Turn-on<br>Shut-down<br>**----- End of picture text -----**<br>


**==> picture [166 x 254] intentionally omitted <==**

**----- Start of picture text -----**<br>
Fig. 3-2    Turn-on behavior, definitions<br>Input<br>Voltage<br>Output | - 5% “=<br>Voltage<br>Start-up Rise<br>l delay i Time<br>< ><br>Fig. 3-4    Power factor vs. output current at 24 V output<br>voltage<br>Power Factor, typ.<br>1.0<br>0.95<br>(a)<br>(b)<br>0.9<br>0.85<br>(a) 100Vac,<br>(c) (b) 120Vac,<br>0.8 (c) 230Vac<br>Output Current<br>0.75<br>1 2 3 4 5 6A<br>Overshoot<br>**----- End of picture text -----**<br>


## 4. DC-INPUT 

The device is suitable to be supplied from a DC input voltage. Use a battery or a similar DC source. A supply from the intermediate DCbus of a frequency converter is not recommended and can cause a malfunction or damage the unit. 

Connect +pole to L, –pole to N, and the PE terminal to an earth wire or to the machine ground. 

|DC input|Nom.|DC 110-150 V|±20%|
|---|---|---|---|
|DC input range||88-180 Vdc||
|DC input current|Typ.|1.21 A|At 110 Vdc, at 24 V, 5 A|
|Allowed Voltage (+) or (-) input to|Max.|360 Vdc|Continuous, according to IEC 60664-1|
|Earth||||
|Turn-on voltage|Typ.|74 Vdc|Steady state value|
|Shut-down voltage|Typ.|67 Vdc|Steadystate value|



**==> picture [400 x 177] intentionally omitted <==**

**----- Start of picture text -----**<br>
Fig. 4-1    Wiring for DC Input<br>Battery Power Supply<br>AC<br>+<br>L<br>N +<br>Load<br>PE<br>-<br>SF<br>_Tr_ C 1 )<br>-<br>DC<br>ae / t<br>October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load,<br>25 °C ambient and after a 5 minute run-in time unless otherwise noted.<br>**----- End of picture text -----**<br>


5/21 

NI PS-25 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

## 5. INPUT INRUSH CURRENT 

An active inrush limitation circuit (NTCs, which are bypassed by a relay contact) limits the input inrush current after turn-on of the input voltage. 

The charging current into EMI suppression capacitors is disregarded in the first microseconds after switch-on. 

|||**AC 100 V**|**AC 120 V**|**AC 230 V**||
|---|---|---|---|---|---|
|Inrush current|Max.|8 Apeak|7 Apeak|7 Apeak|At 40 °C, cold start|
||Typ.|5 Apeak|4 Apeak|4 Apeak|At 25 °C, cold start|
||Typ.|5 Apeak|5 Apeak|6 Apeak|At 40 °C, cold start|
|Inrush energy|Max.|0.4 A²s|0.5 A²s|1 A²s|At 40 °C, cold start|



Fig. 5-1 **Typical turn-on behaviour at nominal load, 120 Vac input and 25 °C ambient** 

Fig. 5-2 **Typical turn-on behaviour at nominal load, 230 Vac input and 25°C ambient** 

## 6. OUTPUT 

The output provides a SELV/PELV rated voltage, which is galvanically isolated from the input voltage. 

The output is designed to supply any kind of loads, including capacitive and inductive loads. If extreme large capacitors, such as EDLCs (electric double layer capacitors or “UltraCaps”) with a capacitance > 0.3 F are connected to the output, the unit might charge the capacitor in an intermittent mode. 

The output is electronically protected against overload, no-load and short-circuits. In case of a protection event, audible noise may occur. 

|Output voltage|Nom.|24 V||
|---|---|---|---|
|Adjustment range||24-28 V|Guaranteed value|
||Max.|30.0 V|This is the maximum output voltage which can occur at the clockwise end|
||||position of the potentiometer due to tolerances. It is not a guaranteed|
||||value which can be achieved.|
|Factorysettings|Typ.|24.1 V|±0.2%, at full load and cold unit|
|Line regulation|Max.|10 mV|Between 85 and 300 Vac|
|Load regulation|Max.|50 mV|Between 0 A and 6 A, static value, see  Fig. 6-1|
|Ripple and noise voltage|Max.|50 mVpp|Load >0.2 A, Bandwidth 20 Hz to 20 MHz, 50 Ohm|
||Max.|200 mVpp|Load <0.2 A, Bandwidth 20 Hz to 20 MHz, 50 Ohm|
|Output current|Nom.|5 A|At 24 V and up to +60 °C ambient temperature|
||Nom.|3.8 A|At 24 V and +70 °C ambient temperature|
||Nom.|4.3 A|At 28 V and up to +60 °C ambient temperature|
||Nom.|3.2 A|At 28 V and +70 °C ambient temperature|
||Derate linearly between +60 °C and +70 °C, see section 16|Derate linearly between +60 °C and +70 °C, see section 16||
|PowerBoost1)|Nom.|6 A|At 24 V and up to +45 °C ambient temperature|
||Nom.|5.1 A|At 28 V and up to +45 °C ambient temperature|
||PowerBoost decreases linearly to nominal power between +45 °C and +60 °C, see section 16|||



October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load, 25 °C ambient and after a 5 minute run-in time unless otherwise noted. 

6/21 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

## NI PS-25 

|Fuse breaking current|Typ.|15 A|Up to 12 ms once every five seconds, see Fig. 6-2.|
|---|---|---|---|
||||The fuse braking current is an enhanced transient current which helps to|
||||tripfuses on faultyoutput branches. The output voltage stays above 20 V.|
|Overload behaviour||Continuous|For output voltage above 13 Vdc, see Fig. 6-1|
|||current||
|||Intermittent|For output voltage below 13 Vdc, see Fig. 6-1|
|||current2)||
|Overload/short-circuit current|Max.|7.2 A|Continuous current, see Fig. 6-1|
||Typ.|9 A|Intermitted current peak value for typ. 1 s|
||||Load impedance 50 mOhm, see Fig. 6-3|
||||Discharge current of output capacitors is not included.|
||Max.|3.5 A|Intermitted current average value (R.M.S.)|
||||Load impedance 50 mOhm, see Fig. 6-3|
|Output capacitance|Typ.|1 800µF|Included inside thepower supply|
|Back-feeding loads|Max.|35 V|The unit is resistant and does not show malfunctioning when a load feeds|
||||back voltage to the power supply. It does not matter whether the power|
||||supply is on or off. The absorbing energy can be calculated according to|
||||the built-in large sized output capacitor.|



- 1) **PowerBoost:** This power/current is continuously allowed up to an ambient temperature of +45 °C. Above +45 °C, do not use this power or current longer than a duty cycle of 10% and/ or not longer than 1 minute every 10 minutes. 

- 2)  At heavy overloads (when output voltage falls below 13 V), the power supply delivers continuous output current for 1 s. After this, the output is switched off for approx. 9 s before a new start attempt is automatically performed. This cycle is repeated as long as the overload exists. If the overload has been cleared, the device will operate normally. See Fig. 6-3. 

**==> picture [509 x 257] intentionally omitted <==**

**----- Start of picture text -----**<br>
Fig. 6-1    Output voltage vs. output current, typ.  Fig. 6-2    Dynamic output current capability, typ.<br>Output Voltage Adjustment Output Voltage  (dynamic behavior, < 12ms)<br>28V2420 —l-A-4-4-4+-+ | | | | | | | | | | I | Ran TP]—L_L_i__l | | ge A I F-|—4| | I | | 28V2420 TT - Ad | Rangejustment iy) | to+—-H-F-F | TNT | I a | rr | “TTIH | | |<br>16 isO | 16 es ee es W |<br>12 i nD 12 a (|<br>A: continuous current ' ' ' ' | | ql | I | | | | | | I I | | I<br>8 B: intermittent current B 8<br>\ \ ' ' So | | yeO | | —|I-| 4—-4—+4—+4—+}}—- | | | | | | | —|-—H| |<br>4 i ee Output Current | eee eee | 4 i a Output Current |<br>0 0<br>0 1 2 3 4 5 6 7 8 9 10A 0 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25A<br>Fig. 6-3    Short-circuit on output, Hiccup [PLUS]  mode, typ.<br>Output<br>Current<br>oNormalperation i Short -circuit operationNormal<br>9A a oe ee — a<br>|<br>|<br>|<br>|<br>| t<br>0<br>1s 9s 1s 9s 1s 9s<br>**----- End of picture text -----**<br>


## - 7. HOLD UP TIME 

The hold-up time is the time during which a power supply’s output voltage remains within specification following the loss of input power. The hold-up time is output load dependent. At no load, the hold-up time can be up to several seconds. The green DC OK LED is also on during this time. 

October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load, 25 °C ambient and after a 5 minute run-in time unless otherwise noted. 

7/21 

NI PS-25 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

**AC 100 V AC 120 V AC 230 V** Hold-up Time Typ. 70 ms 70 ms 70 ms At 24 V, 2.5 A, see Fig. 7-1 Min. 55 ms 55 ms 55 ms At 24 V, 2.5 A, see Fig. 7-1 Typ. 35 ms 35 ms 35 ms At 24 V, 5 A, see Fig. 7-1 Min. 27 ms 27 ms 27 ms At 24 V, 5 A, see Fig. 7-1 

**==> picture [418 x 127] intentionally omitted <==**

**----- Start of picture text -----**<br>
Fig. 7-1    Hold-up time vs. input voltage  Fig. 7-2    Shut-down behavior, definitions<br>Hold-up Time<br>90ms a) 24V 2.5A typ. c) 24V 5A typ. Zero Transition<br>oor b) 24V 2.5A min. . d) 24V 5A min. Input<br>75 a Voltage<br>60 ——~~~ ~~~}  o—o—~~~} ~~~ ~~ b \ \\<—_ |<br>45 a |<br>c ~ - 5%<br>30 —— fF d Output |<br>15 Voltage<br>Input Voltage Hold-up Time<br>0 + +<br>90 120 155 190 230Vac<br>**----- End of picture text -----**<br>


## 8. DC OK RELAY CONTACT 

This feature monitors the output voltage on the output terminals of a running power supply. 

Contact closes As soon as the output voltage reaches typ. 90% of the adjusted output voltage level. Contact opens As soon as the output voltage dips more than 10% below the adjusted output voltage. Short dips will be extended to a signal length of 100 ms. Dips shorter than 1 ms will be ignored. Switching hysteresis Typically 0.7 V Contact ratings Maximal 60 Vdc 0.3 A, 30 Vdc 1 A, 30 Vac 0.5 A, resistive load Minimal permissible load: 1 mA at 5 Vdc Isolation voltage See dielectric strength table in section 18. 

**==> picture [165 x 122] intentionally omitted <==**

**----- Start of picture text -----**<br>
Fig. 8-1    DC OK relay contact behavior<br>VOUT = VADJ<br>10%<br>0.9* VADJ<br>7”  -<br>< ><br>1ms 1...4ms 100ms<br>| NM | | oO<br>| Ht +<br>— —> |<br>poop open T closed H ro open oy 1T closed H<br>**----- End of picture text -----**<br>


October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load, 25 °C ambient and after a 5 minute run-in time unless otherwise noted. 

8/21 

NI PS-25 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

## 9. EFFICIENCY AND POWER LOSSES 

|9. EFFICIENCY AND POWER LOSSESFFICIENCY AND POWER LOSSES|EFFICIENCY AND POWER LOSSESFFICIENCY AND POWER LOSSESPOWER LOSSESOWER LOSSESLOSSESOSSES|EFFICIENCY AND POWER LOSSESFFICIENCY AND POWER LOSSESPOWER LOSSESOWER LOSSESLOSSESOSSES||||
|---|---|---|---|---|---|
|||**AC 100 V**|**AC 120 V**|**AC 230 V**||
|Efficiency|Typ.|92.9%|93.6%|94.3%|At 24 V, 5 A|
||Typ.|92.7%|93.5%|94.5%|At 24 V, 6 A(PowerBoost)|
|Average efficiency*)|Typ.|91.3%|91.7%|92.0%|25% at 1.25 A, 25% at 2.5 A,|
||||||25% at 3.75 A. 25% at 5 A|
|Power losses|Typ.|1.3 W|1.3 W|1.4 W|At 24 V, 0 A|
||Typ.|4.6 W|4.4 W|4.1 W|At 24 V, 2.5 A|
||Typ.|9.2 W|8.2 W|7.3 W|At 24 V, 5 A|
||Typ.|11.3 W|9.8 W|8.4 W|At 24 V, 6 A(PowerBoost)|



- *) The average efficiency is an assumption for a typical application where the power supply is loaded with 25% of the nominal load for 25% of the time, 50% of the nominal load for another 25% of the time, 75% of the nominal load for another 25% of the time and with 100% of the nominal load for the rest of the time. 

**==> picture [474 x 126] intentionally omitted <==**

**----- Start of picture text -----**<br>
Fig. 9-1    Efficiency vs. output current at 24 V, typ.  Fig. 9-2    Losses vs. output current at 24 V, typ.<br>Efficiency Power Losses<br>95%9493 eenaa|nnn ee ee — 12W10 eeLoot.ne eens  (a) 100Vac  (b) 120Vac  (c)  230Vac eeenAee a<br>8<br>92 —e rs a oe ee ~_-<br>—— re |<br>91 _Jf 1b td 6 — Ete a1 __<br>f | |  (a) 100Vac | | | | |<br>90  (b) 120Vac<br>89 4---4+---+|||  (c)  230Vac --+| 4 a — ei<br>| | | | | 2 og<br>88 Satta poh | | | | !<br>Output Current Output Current<br>87 0<br>1 2 3 4 5 6A 0 1 2 3 4 5 6A<br>(c)<br>(b)<br>(a)<br>(a)<br>(b)<br>(c)<br>**----- End of picture text -----**<br>


Fig. 9-3 **Efficiency vs. input voltage at 24 V, 5 A, typ.** 

**==> picture [175 x 111] intentionally omitted <==**

**----- Start of picture text -----**<br>
Efficiency<br>95%<br>TOT TTT<br>|<br>9493 eei ee | ee<br>92 a<br>rT |<br>91 Jobort | | |<br>90 Jobe<br>I Input Voltage | Nl<br>89<br>100 120 180 230 264Vac<br>**----- End of picture text -----**<br>


Fig. 9-4 **Losses vs. input voltage at 24 V, 5 A, typ.** 

**==> picture [174 x 111] intentionally omitted <==**

**----- Start of picture text -----**<br>
Power Losses<br>11W<br>TOT TTT<br>| | |<br>10 ee [es]<br>9 NGaeees |<br>8 Ne<br>rT |<br>7 5 rT ee | ee | eee<br>6 1-1—~---4----4---1<br>Input Voltage<br>5<br>100 120 180 230 264Vac<br>**----- End of picture text -----**<br>


October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load, 25 °C ambient and after a 5 minute run-in time unless otherwise noted. 

9/21 

NI PS-25 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

## 10.FUNCTIONAL DIAGRAM 

**==> picture [335 x 125] intentionally omitted <==**

**----- Start of picture text -----**<br>
Fig. 10-1    Functional diagram<br>a<br>L Input Fuse | ++<br>N Input FilterInput RectifierInrush Current Limiter ConverterPFC ConverterPower OutputFilter -<br>© -<br>:<br>Output<br>RegulatorVoltage VOUT<br>!<br>|| Temper-downatureShut- ManagerOutputPower ProtectionVoltageOutputOver- MonitorVoltageOutput | DC-ok H &e) DC-okLEDDC-ok<br>ee Relay | Contact<br>**----- End of picture text -----**<br>


## 11.FRONT SIDE AND USER ELEMENTS 

## **A Output Terminals** 

**==> picture [86 x 38] intentionally omitted <==**

**----- Start of picture text -----**<br>
po e<br>**----- End of picture text -----**<br>


**T** wo identical + poles and two identical – poles 

Spring-clamp terminals 

      - **+** Positive output 

      - Negative (return) output 

- **B Output Voltage Potentiometer** 

- **C DC OK LED** (green) 

   - On when the output voltage is > 90% of the adjusted output voltage 

## **D DC OK Relay Contact** 

- The DC OK relay contact is synchronized with the DC OK LED. See section 8 for details. 

## **E Input Terminals** 

   - **N, L** Line input 

- PE (Protective 

- Earth) input 

October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load, 25 °C ambient and after a 5 minute run-in time unless otherwise noted. 

10/21 

NI PS-25 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

## 12.CONNECTION TERMINALS 

The terminals are IP20 finger safe constructed and suitable for field- and factory wiring. 

|**NI PS-25**|**Input**|**Output**|**DC OK-Signal**|
|---|---|---|---|
|Type|Quick-connect spring-|Quick-connect spring-|Push-in terminal|
||clampterminal|clampterminal||
|Solid wire|Max. 6 mm2|Max. 6 mm2|Max. 1.5 mm2|
|Stranded wire|Max. 4 mm2|Max. 4 mm2|Max. 1.5 mm2|
|American Wire Gauge|AWG 20-10|AWG 20-10|AWG 24-16|
|Max. wire diameter(includingferrules)|2.8 mm|2.8 mm|1.6 mm|
|Wire strippinglength|10 mm|10 mm|7 mm|
|Screwdriver|—|—|3 mm slotted to open the spring|



## **Daisy chaining:** 

Daisy chaining (jumping from one power supply output to the next) is allowed as long as the average output current through one terminal pin does not exceed 25 A. If the current is higher, use a separate distribution terminal block as shown in Fig. 12-2. 

**==> picture [378 x 82] intentionally omitted <==**

**----- Start of picture text -----**<br>
Fig. 12-1    Daisy chaining of outputs  Fig. 12-2    Using distribution terminals<br>Distribution<br>Power Terminals<br>aupply Power Power<br>Supply Supply<br>w+-- Load l e} lo<br>+  + -  - +  + -  - Load<br>Output Output + -<br>fT aL[I | | | 2 fo<br>**----- End of picture text -----**<br>


## 13.LIFETIME EXPECTANCY 

The lifetime expectancy shown in the table indicates the minimum operating hours (service life) and is determined by the lifetime expectancy of the built-in electrolytic capacitors. Lifetime expectancy is specified in operational hours and is calculated according to the capacitor’s manufacturer specification. The manufacturer of the electrolytic capacitors only guarantees a maximum life of up to 15 years (131,400 h). Any number exceeding this value is a calculated theoretical lifetime which can be used to compare devices. 

||**AC 100 V**|**AC 120 V**|**AC 230 V**||
|---|---|---|---|---|
|Lifetime expectancy|265,000 h|270,000 h|274,000 h|At 24 V, 2.5 A and 40 °C|
||748,000 h|764,000 h|775,000 h|At 24 V, 2.5 A and 25 °C|
||128,000 h|143,000 h|166,000 h|At 24 V, 5 A and 40 °C|
||363,000 h|405,000 h|469,000 h|At 24 V, 5 A and 25 °C|
||81,000 h|96,000 h|119,000 h|At 24 V, 6 A and 40 °C|
||228,000 h|271,000 h|336,000 h|At 24 V,6 A and 25 °C|



## 14.MTBF 

MTBF stands for **M** ean **T** ime **B** etween **F** ailure, which is calculated according to statistical device failures, and indicates reliability of a device. It is the statistical representation of the likelihood of a unit to fail and does not necessarily represent the life of a product. The MTBF figure is a statistical representation of the likelihood of a device to fail. A MTBF figure of, for example, 1,000,000 h means that statistically one unit will fail every 100 hours if 10,000 units are installed in the field. However, it cannot be determined if the failed unit has been running for 50,000 h or only for 100 h. 

For these types of units, the MTTF ( **M** ean **T** ime **T** o **F** ailure) value is the same value as the MTBF value. 

October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load, 25 °C ambient and after a 5 minute run-in time unless otherwise noted. 

11/21 

## NI PS-25 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

**AC 100 V AC 120 V AC 230 V** MTBF  SN 29500, IEC 61709 800,000 h 807,000 h 867,000 h At 24 V, 5 A, and 40 °C 1,402,000 h 1,414,000 h 1,510,000 h At 24 V, 5 A, and 25 °C MTBF  MIL HDBK 217F 339,000 h 343,000 h 368,000 h At 24 V, 5 A, and 40 °C; Ground Benign GB40 490,000 h 496,000 h 529,000 h At 24 V, 5 A, and 25 °C; Ground Benign GB25 81,000 h 83,000 h 89,000 h At 24 V, 5 A, and 40 °C; Ground Fixed GF40 109,000 h 111,000 h 119,000 h At 24 V, 5 A, and 25 °C; Ground Fixed GF25 15.EMC The EMC behavior of the device is designed for applications in industrial environment as well as in residential, commercial, and light industry environments. The device is investigated according to EN 61000-6-1, EN 61000-6-2, EN 61000-6-3, and EN 61000-6-4. **EMC Immunity** Electrostatic discharge EN 61000-4-2 Contact discharge 8 kV Criterion A Air discharge 15 kV Criterion A Electromagnetic RF field EN 61000-4-3 80 MHz-2.7 GHz 20 V/m Criterion A Fast transients (Burst) EN 61000-4-4 Input lines 4 kV Criterion A Output lines 2 kV Criterion A DC OK signal (coupling clamp) 2 kV Criterion A Surge voltage on input EN 61000-4-5 L  N 2 kV Criterion A L  PE, N  PE 4 kV Criterion A Surge voltage on output EN 61000-4-5 +  - 1 kV Criterion A + / -  PE 2 kV Criterion A Surge voltage on DC OK EN 61000-4-5 DC OK signal  PE 1 kV Criterion A Conducted disturbance EN 61000-4-6 0.15-80 MHz 20 V Criterion A Mains voltage dips EN 61000-4-11 0% of 100 Vac 0 Vac, 20 ms Criterion A 40% of 100 Vac 40 Vac, 200 ms Criterion C 70% of 100 Vac 70 Vac, 500 ms Criterion A 0% of 200 Vac 0 Vac, 20 ms Criterion A 40% of 200 Vac 80 Vac, 200 ms, <4 A Criterion A 40% of 200 Vac 80 Vac, 200 ms, >4 A Criterion C 70% of 200 Vac 140 Vac, 500 ms Criterion A Voltage interruptions EN 61000-4-11 0% of 200 Vac (=0 V) 5000 ms Criterion C Powerful transients VDE 0160 Over entire load range 750 V, 0.3 ms Criterion A **Performance criterions: A:** The device shows normal operation behavior within the defined limits. **C:** Temporary loss of function is possible. The device may shut down and restarts by itself. No damage or hazards for the device will occur. **EMC Emission** Conducted emission EN 55011, EN 55032, FCC Part 15, CISPR 11, CISPR 32 Class B input lines Conducted emission IEC/CISPR 16-1-2, IEC/CISPR 16-2-1 Limits for local DC power networks output lines fulfilled Radiated emission EN 55011, EN 55032 Class B 25 °C ambient and after a 5 minute run-in time unless otherwise noted. October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load, 12/21 ~~_~~ 

NI PS-25 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

Harmonic input current (PFC) EN 61000-3-2 Voltage fluctuations, flicker EN 61000-3-3 

Fulfilled for Class A equipment Fulfilled[,] tested with constant current loads, non-pulsing 

## This device complies with FCC Part 15 rules. 

Operation is subjected to following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. 

|**Switching Frequencies**||||
|---|---|---|---|
|PFC converter|30 kHz to 140 kHz|Input voltage and output load dependent|Input voltage and output load dependent|
|Main converter|60 kHz to 140 kHz|Output load dependent||
|Auxiliaryconverter|30 kHz to 60 kHz|Output load dependent||
|16. ENVIRONMENT||||
|Operational temperature|-25 °C to +70 °C||Operational temperature is the same as the ambient or|
||||surrounding temperature and is defined as the air|
||||temperature 2 cm below the unit.|
|Storage temperature|-40 °C to +85 °C||For storage and transportation|
|Output derating|3 W/K||Between +60 °C and +70 °C|
||0.33 A/1000 m or 5 K/1000 m||For altitudes >2000 m, see Fig. 16-2|
||The derating is not hardware controlled. The user has to take this into consideration to stay below the|||
||derated current limits in order not to overload the unit.|||
|Humidity|5 to 95% r.h.||Accordingto IEC 60068-2-30|
|Atmosphericpressure|110-54 kPa||See Fig. 16-2 for details|
|Altitude|Upto 5000 m||See Fig. 16-2 for details|
|Over-voltage category|III||According to IEC 60664-1 for altitudes up to 2000 m|
||II||Accordingto IEC 60664-1, for altitudes above 2000 m|
|Degree ofpollution|2||Accordingto IEC 62477-1,not conductive|
|Vibration sinusoidal|2-17.8 Hz: ±1.6 mm;||According to IEC 60068-2-6|
||17.8-500 Hz: 2 g|||
||2 hours/axis|||
|Shock|30 g 6 ms, 20 g 11 ms||According to IEC 60068-2-27|
||3 bumps per direction, 18 bumps in total|||



## 16.ENVIRONMENT 

Shock and vibration is tested in combination with DIN rails according to EN 60715 with a height of 15 mm and a thickness of 1.3 mm and standard orientation. Some audible noise may be emitted from the power supply during no load, overload, or short circuit. 

Audible noise 

Fig. 16-1 **Output current vs. ambient temp. (Inom 5A; Iout with PowerBoost = 6A)** 

Fig. 16-2 **Output current vs. altitude** 

**==> picture [427 x 124] intentionally omitted <==**

**----- Start of picture text -----**<br>
Allowed Output Current at 24V Allowed Output Current at 24V<br>6A B 6A<br>5A 5A<br>A<br>4A<br>3.8A<br>ne iis BO<br>|||<br>|||<br>A... 85 to 264Vac, continuous | | | | | |<br>B... short term | | | | | |<br>| I | I | | |<br>0<br>Altitude 0m 2000m 5000m<br>-25 0 45 60 70°C<br>AP [*)] 110kPa 80kPa 54kPa<br>Ambient Temperature *) Atmospheric pressure<br>C<br>B<br>A<br>A... Tamb < 60°C<br>B... Tamb < 45°C<br>C... Short term<br>**----- End of picture text -----**<br>


October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load, 25 °C ambient and after a 5 minute run-in time unless otherwise noted. 

13/21 

NI PS-25 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

17.SAFETY AND PROTECTION FEATURES ~~ee~~ 

|17.SAFETY AND PROTECTION FEATURES SAFETY AND PROTECTION FEATURESAFETY AND PROTECTION FEATURESPROTECTION FEATURESROTECTION FEATURES<br>~~ee~~|17.SAFETY AND PROTECTION FEATURESSAFETY AND PROTECTION FEATURESAFETY AND PROTECTION FEATURESPROTECTION FEATURESROTECTION FEATURESFEATURESEATURES<br>~~ee~~|17.SAFETY AND PROTECTION FEATURESSAFETY AND PROTECTION FEATURESAFETY AND PROTECTION FEATURESPROTECTION FEATURESROTECTION FEATURESFEATURESEATURES<br>~~ee~~|~~ee~~|
|---|---|---|---|
|Isolation resistance|Min.|500 MOhm|At delivered condition between input and output, measured|
||||with 500 Vdc|
||Min.|500 MOhm|At delivered condition between input and PE, measured with|
||||500 Vdc|
||Min.|500 MOhm|At delivered condition between output and PE, measured|
||||with 500 Vdc|
||Min.|500 MOhm|At delivered condition between output and DC OK contacts,|
||||measured with 500 Vdc|
|PE resistance|Max.|0.1 Ohm|Resistance between PE terminal and the housing in the area|
||||of the DIN rail mountingbracket.|
|Output over-voltage protection|Typ.|30.5 Vdc||
||Max.|32.0 Vdc||
|||In case of an internal defect, a redundant circuit limits the maximum output voltage.||
|||The output shuts down and performs three restart attempts. If the failure continues, the||
|||output shuts down. Cycle inputpower to reset.||
|Class of protection||I|According to IEC 61140|
||||A PE(Protective Earth)connection is required|
|Degree ofprotection||IP 20|Accordingto EN/IEC 60529|
|Over-temperature protection||Included|Output shut-down with automatic restart.|
||||Temperature sensors are installed on critical components|
||||inside the unit and turn the unit off in safety critical|
||||situations, which can happen, for example, when ambient|
||||temperature is too high, ventilation is obstructed, or the|
||||derating requirements are not followed. There is no|
||||correlation between the operating temperature and turn-off|
||||temperature because this is dependent on input voltage,|
||||load, and installation methods.|
|Input transient protection||MOV (Metal Oxide|For protection values, see section 15 (EMC).|
|||Varistor)||
|Internal input fuse||Included|Not user replaceable slow-blow high-brakingcapacityfuse|
|Touch current (leakage current)|Typ.|0.10 mA/0.27 mA|At 100 Vac, 50 Hz, TN-,TT-mains/IT-mains|
||Typ.|0.13 mA/0.38 mA|At 120 Vac, 60 Hz, TN-,TT-mains/IT-mains|
||Typ.|0.20 mA/0.60 mA|At 230 Vac, 50 Hz, TN-,TT-mains/IT-mains|
||Max.|0.13 mA/0.35 mA|At 110 Vac, 50 Hz, TN-, TT-mains/IT-mains|
||Max.|0.17 mA/0.51 mA|At 132 Vac, 60 Hz, TN-, TT-mains/IT-mains|
||Max.|0.27 mA/0.81 mA|At 264 Vac, 50 Hz, TN-, TT-mains/IT-mains|
|18. DIELECTRICSTRENGTH||||
|14/21<br>October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load,<br>25 °C ambient and after a 5 minute run-in time unless otherwise noted.<br>The output voltage is floating and has no ohmic connection to the ground.<br>The output is insulated to the input by a double or reinforced insulation.<br>Type and routine tests are conducted by the manufacturer. Field tests may be conducted in the field using the appropriate test<br>equipment which applies the voltage with a slow ramp (2 s up and 2 s down). Connect all input-terminals together as well as all output<br>poles before conducting the test. When testing, set the cut-off current settings to the value in the table below.<br>We recommend that either the + pole or the – pole shall be connected to the protective earth system. This helps to avoid situations in<br>which a load starts unexpectedly or cannot be switched off when unnoticed earth faults occur.<br>~~oo~~||||



## NI PS-25 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

|Fig. 18-1<br>**N**<br>**L**<br>Input|Fig. 18-1<br>**N**<br>**L**<br>Input|Fig. 18-1<br>**N**<br>**L**<br>Input|Fig. 18-1**Dielectric strength**|Fig. 18-1**Dielectric strength**|**Dielectric strength**<br>**B*)**<br>DC-ok<br>~~_.~~|**Dielectric strength**<br>**B*)**<br>DC-ok<br>~~_.~~|**Dielectric strength**<br>**B*)**<br>DC-ok<br>~~_.~~|**Dielectric strength**<br>**B*)**<br>DC-ok<br>~~_.~~|**Dielectric strength**<br>**B*)**<br>DC-ok<br>~~_.~~|**Dielectric strength**<br>**B*)**<br>DC-ok<br>~~_.~~|**Dielectric strength**<br>**B*)**<br>DC-ok<br>~~_.~~|**Dielectric strength**<br>**B*)**<br>DC-ok<br>~~_.~~|**Dielectric strength**<br>**B*)**<br>DC-ok<br>~~_.~~|**Dielectric strength**<br>**B*)**<br>DC-ok<br>~~_.~~||||**A**<br>**B**<br>**C**<br>**D**<br>Type test<br>60 s<br>2500 Vac<br>3000 Vac<br>1000 Vac<br>500 Vac<br>Routine test<br>5 s<br>2500 Vac<br>2500 Vac<br>500 Vac<br>500 Vac<br>Field test<br>5 s<br>2000 Vac<br>2000 Vac<br>500 Vac<br>500 Vac<br>~~ee~~<br>~~ee~~<br>~~a~~|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|**A**|||||**B**||||**D**|||||||||Field test cut-off current<br>> 10 mA<br>> 10 mA<br>> 20 mA<br>> 1 mA|
|||||||||||||||||||settings|
|Earth, PE|||||**C**<br>~~—~~|||Output<br>**+**||||||||||B*)<br>When testing input to DC OK, ensure that the maximal voltage between DC OK and the output is<br>not exceeded (column D). We recommend connecting DC OK pins and the output pins together|
||||||||||||||||**-**|||when performing the test.|



## 19.APPROVED, FULFILLED OR TESTED STANDARDS 

|19.APPROVED, APPROVED,PPROVED,,|FULFILLED OR TESTED STANDARDSULFILLED OR TESTED STANDARDSTESTED STANDARDSESTED STANDARDS|FULFILLED OR TESTED STANDARDSULFILLED OR TESTED STANDARDSTESTED STANDARDSESTED STANDARDSSTANDARDSTANDARDS|
|---|---|---|
|UL 61010-2-201||UL Certificate|
||¢U)us LISTED|Listed equipment for category NMTR - Electrical Equipment for Measurement,<br>Control and Laboratory Use - Particular requirements for control equipment<br>Applicable for US and Canada|
|||E-File: E330187|
|Class I Div 2||UL Certificate|
|||Listed equipment for category NRAD - Listed equipment Industrial Control|
||¢U)us LISTED|Equipment for Use in Hazardous Locations<br>Applicable for US and Canada<br>E-File: E536050|
|||Temperature Code: T4|
|||Groups: A, B, C and D|
|IEC 61558-2-16||Test Certificate|
||Safety Isolating|Safety of transformers, reactors, power supply units, and similar products for|
||Transformer|supply voltages up to 1100 V|
||IEC 61558-2-16|Particular requirements and tests for switch mode power supply units and|
|||transformers for switch modepower supplyunits|
|SEMI F47||Test Report|
||SEMI F47|Voltage Sag Immunity for Semiconductor Processing Equipment<br>Tested for AC 208V L-L or L-N mains voltages, nominal output voltage, and|
|||nominal output load|
|VDMA 24364|LABS|Paint Wetting Impairment Substances Test (or LABS-Test)<br>Tested for Zone 2 and test class C1 according to VDMA 24364-C1-L/W for solvents|
||VDMA, 24364-C1-LAY|and water-based paints|



## 20.REGULATORY PRODUCT COMPLIANCE 

|EU Declaration of Conformity||The CE mark indicates conformance with the|
|---|---|---|
|||- EMC directive|
|||- Low-voltage directive|
|||- RoHS directive|
|REACH Regulation (EU)||Manufacturer's Declaration|
||REACHY|EU regulation regarding the Registration, Evaluation, Authorisation, and<br>Restriction of Chemicals (REACH) fulfilled.|
|||EU Regulation(EC)1907/2006.|
|WEEE Regulation||Manufacturer's Declaration|
|||EU Regulation on Waste Electrical and Electronic Equipment|
|||Registered as business to business (B2B) products.|
|||EU Regulation 2012/19/EU|



October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load, 25 °C ambient and after a 5 minute run-in time unless otherwise noted. 

15/21 

NI PS-25 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

UKCA 

UKCA Declaration of Conformity Trade conformity assessment for England, Scotland and Wales The UKCA mark indicates conformity with the UK Statutory Instruments 2016 No.1091, 2016 No.1107 2012 No.3032 

## 21.PHYSICAL DIMENSIONS AND WEIGHT 

Width 32 mm Height 124 mm Depth 102 mm The DIN rail depth must be added to the unit depth to calculate the total required installation depth. Weight 440 g DIN rail Use 35 mm DIN rails according to EN 60715 or EN 50022 with a height of 7.5 or 15 mm. Housing material Body: Aluminium alloy Cover: Zinc-plated steel Installation clearances See section 2 Penetration protection Small parts like screws, nuts, etc. with a diameter larger than 3.5 mm 

**==> picture [63 x 7] intentionally omitted <==**

**----- Start of picture text -----**<br>
Fig. 21-1    Front view<br>**----- End of picture text -----**<br>


Fig. 21-2 **Side view** 

All dimensions in mm All dimensions in mm 

October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load, 25 °C ambient and after a 5 minute run-in time unless otherwise noted. 

16/21 

NI PS-25 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

## 22.ACCESSORIES 

## 22.1. SIDE MOUNTING BRACKET 

This bracket is used to mount the power supply sideways with or without using a DIN rail. 

The two aluminum brackets and black plastic slider of the unit must be detached, so that the steel brackets can be mounted. 

For sideways DIN rail mounting, the removed aluminum brackets and the black plastic slider need to be mounted on the steel bracket. 

**==> picture [122 x 7] intentionally omitted <==**

**----- Start of picture text -----**<br>
Fig. 22-1    Side mounting without DIN rail<br>**----- End of picture text -----**<br>


Fig. 22-2 **Side mounting with DIN rail** Fig. 22-3 **Mounting dimensions for side mounting bracket** 

**==> picture [172 x 6] intentionally omitted <==**

**----- Start of picture text -----**<br>
brackets  brackets-<br>**----- End of picture text -----**<br>


## 23.APPLICATION NOTES 

## 23.1. PEAK CURRENT CAPABILITY 

The unit can deliver peak currents (up to several milliseconds) which are higher than the specified short term currents. 

This helps to start current demanding loads. Solenoids, contactors and pneumatic modules often have a steady state coil and a pick-up coil. The inrush current demand of the pick-up coil is several times higher than the steady-state current and usually exceeds the nominal output current. The same situation applies when starting a capacitive load. 

The peak current capability also ensures the safe operation of subsequent circuit breakers of load circuits. The load branches are often individually protected with circuit breakers or fuses. In case of a short or an overload in one branch circuit, the fuse or circuit breaker need a certain amount of over-current to open in a timely manner. This avoids voltage loss in adjacent circuits. 

The extra current (peak current) is supplied by the power converter and the built-in large sized output capacitors of the power supply. The capacitors get discharged during such an event, which causes a voltage dip on the output. The following three examples show typical voltage dips for resistive loads: 

October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load, 25 °C ambient and after a 5 minute run-in time unless otherwise noted. 

17/21 

NI PS-25 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

**==> picture [120 x 16] intentionally omitted <==**

**----- Start of picture text -----**<br>
Fig. 23-1    10Apeak current for 50 ms , typ.<br>(2x the nominal current)<br>**----- End of picture text -----**<br>


**==> picture [117 x 16] intentionally omitted <==**

**----- Start of picture text -----**<br>
Fig. 23-2    25Apeak current for 5 ms , typ.<br>(5x the nominal current)<br>**----- End of picture text -----**<br>


Fig. 23-3 **15Apeak current for 12 ms , typ. (3x the nominal current)** 

Please note: The DC OK relay triggers when the voltage dips more than 10% for longer than 1 ms. 

Peak current voltage dips 

Typically from 24 V to 16 V At 10 A for 50 ms and resistive load Typically from 24 V to 16.5 V At 25 A for 2 ms and resistive load Typically from 24 V to 14 V At 25 A for 5 ms and resistive load 

## 23.2. CHARGING OF BATTERIES 

The power supply can be used to charge lead-acid or maintenance free batteries. Two 12 V SLA or VRLA batteries are needed in series connection. 

## **Instructions for charging batteries:** 

- a) Use only matched batteries when putting 12 V types in series. 

- b) Ensure that the ambient temperature of the power supply stays below 40 °C for mains voltage of AC 120 V or higher and 35 °C for a mains voltage of AC 100 V. 

- c) Use a 10 A circuit breaker or a blocking diode between the power supply and the battery. 

- d) Ensure that the output current of the power supply is below the allowed charging current of the battery. 

- e) The return current to the power supply is typically 8 mA. This return current can discharge the battery when the power supply is switched off except in case a blocking diode is utilized. 

- f) Set the output voltage, measured at no load and at the battery end of the cable, very precisely to the end-of-charge voltage. The voltage should be set to 27.8 V at 10 °C, 27.5 V at 20 °C, 27.15 V at 30 °C, and 26.8 V at 40 °C ambient temperature. 

October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load, 25 °C ambient and after a 5 minute run-in time unless otherwise noted. 

18/21 

NI PS-25 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

## 23.3. SERIES OPERATION 

Devices of the same type can be connected in series for higher output voltages. It is possible to connect as many units in series as needed, providing the sum of the output voltage does not exceed 150 Vdc. Voltages with a potential above 60 Vdc must be installed with a protection against touching. 

Avoid return voltage (for example, from a decelerating motor or battery) which is applied to the output terminals. 

Keep an installation clearance of 15 mm (left / right) between two power supplies and avoid installing the power supplies on top of each other. Do not use power supplies in series in mounting orientations other than the standard mounting orientation. 

**==> picture [108 x 105] intentionally omitted <==**

**----- Start of picture text -----**<br>
Unit A<br>Input<br>+<br>-<br>Output<br>+<br>Unit B<br>Load<br>Input<br>+ -<br>-<br>Output<br>**----- End of picture text -----**<br>


Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple devices. 

**==> picture [501 x 107] intentionally omitted <==**

**----- Start of picture text -----**<br>
Unit A<br>23.4. PARALLEL USE TO INCREASE OUTPUT POWER<br>Input<br>+<br>Devises can be paralleled to increase the output power. The output voltage shall be<br>adjusted to the same value (±100 mV) with the same load conditions on all devices, or the  -<br>Output<br>devices can be left with the factory settings.  +<br>Unit B<br>The ambient temperature is not allowed to exceed +40 °C.  Load<br>Input<br>If more than three devices are connected in parallel, a fuse or circuit breaker with a rating  + -<br>of 10 A is required on each output. Alternatively, a diode can also be utilized.  -<br>Energize all devices at the same time. It also might be necessary to cycle the input power  D Output<br>**----- End of picture text -----**<br>


Energize all devices at the same time. It also might be necessary to cycle the input power (turn-off for at least five seconds) if the output was in overload or short circuits and the required output current is higher than the current of one unit. 

Keep an installation clearance of 15 mm (left / right) between two devices and avoid installing devices on top of each other. Do not use devices in parallel in mounting orientations other than the standard mounting orientation or in any other condition where a reduction of the output current is required (for example, altitude). 

Pay attention that leakage current, EMI, and inrush current will increase when using multiple devices. 

## 23.5. PARALLEL USE FOR REDUNDANCY 

## **1+1 Redundancy:** 

Devices can be paralleled for redundancy to gain higher system availability. Redundant systems require a certain amount of extra power to support the load in case one device fails. The simplest way is to put two devices in parallel. This is called a 1+1 redundancy. In case one device fails, the other one is automatically able to support the load current without any interruption. It is possible that the defective unit will become a load of another power supply while configured in parallel usage. 

1+1 redundancy allows ambient temperatures up to +70 °C. 

Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple devices. 

Recommendations for building redundant power systems: 

- Use separate input fuses for each device. 

- Use separate mains systems for each device whenever it is possible. 

- Monitor the individual devices. Therefore, use the DC OK signal of the device. 

- It is desirable to set the output voltages of all devices to the same value (± 100 mV) or leave it at the factory setting. 

## **N+1 Redundancy:** 

Redundant systems for a higher power demand are usually built in a N+1 method. For example, four devices, each rated for 5 A, are paralleled to build a 15 A redundant system. 

Pay attention that leakage current, EMI, inrush current, and harmonics will increase when using multiple devices. 

October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load, 25 °C ambient and after a 5 minute run-in time unless otherwise noted. 

19/21 

NI PS-25 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

Keep an installation clearance of 15 mm (left/right) between two devices and avoid installing the devices on top of each other. 

Do not use devices in parallel in mounting orientations other than the standard mounting orientation or in any other condition, where a reduction of the output current is required. 

For N+1 redundancy, the ambient temperature is not allowed to exceed +40 °C. 

## 23.6. OPERATION ON TWO PHASES 

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Power Supply<br>The power supply can also be used in two phases of a three-phase-system. Such a  L1 AC<br>phase-to-phase connection is allowed as long as the supplying voltage is below<br>240 V [+10%] .   L<br>Ensure that the wire, which is connected to the N-terminal, is appropriately fused.  L3 N<br>The maximum allowed voltage between a phase and the PE must be below 300 Vac.  PE<br>DC<br>C L2 HL<br> max.<br>+10%<br>240V<br>**----- End of picture text -----**<br>


## 23.7. USE IN A TIGHTLY SEALED ENCLOSURE 

When the power supply is installed in a tightly sealed enclosure, the temperature inside the enclosure will be higher than outside. In such situations, the inside temperature defines the ambient temperature for the power supply. 

The following measurement results can be used as a reference to estimate the temperature rise inside the enclosure. 

The power supply is placed in the middle of the box, and no other heat producing items are inside the box. 

The temperature sensor inside the box is placed in the middle of the right side of the power supply with a distance of 1 cm. 

The following measurement results can be used as a reference to estimate the temperature rise inside the enclosure. 

||**Case A**|**Case B**|
|---|---|---|
|Enclosure size|110 x 180 x 165 mm|110 x 180 x 165 mm|
||Rittal Typ IP66 Box|Rittal Typ IP66 Box|
||PK 9516 100,|PK 9516 100,|
||plastic|plastic|
|Input voltage|230 Vac|230 Vac|
|Load|24 V, 4 A;(=**80%**)|24 V, 5 A;(=**100%**)|
|Temperature inside the box|38.3 °C|39.6 °C|
|Temperature outside the box|26.1 °C|25.5 °C|
|Temperature rise|12.2 K|14.1 K|



## 23.8. MOUNTING ORIENTATIONS 

Mounting orientations other than input terminals on the bottom and output on the top require a reduction in continuous output power or a limitation in the maximum allowed ambient temperature. 

The listed lifetime and MTBF values from this datasheet apply only for the standard mounting orientation. 

The following curves give an indication for allowed output currents for altitudes up to 2000 m. 

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Fig. 23-4 Allowed Output Current at 24V<br>Mounting  OUTPUT 6A<br>Orientation  A  5A<br>(Standard<br>orientation) Power 3.8A<br>Supply<br>0<br>INPUT +45 +60 +70°C<br>Ambient Temperature<br>**----- End of picture text -----**<br>


October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load, 25 °C ambient and after a 5 minute run-in time unless otherwise noted. 

20/21 

NI PS-25 

24 V, 5 A, 120 W, SINGLE PHASE INPUT 

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Fig. 23-5 Allowed Output Current at 24V<br>Mounting  6A<br>Orientation  B<br>(Upside down) 4A<br>0<br>+30 +60 +70°C<br>Ambient Temperature<br>Fig. 23-6 Allowed Output Current at 24V<br>Mounting  6A<br>Orientation  C<br>(Table-top<br>3.5A<br>mounting)<br>0<br>+25 +60 +70°C<br>Ambient Temperature<br>Fig. 23-7 Allowed Output Current at 24V<br>Mounting  6A<br>Orientation  D<br>(Horizontal cw)<br>3.5A<br>0<br>+25 +60 +70°C<br>Ambient Temperature<br>Fig. 23-8 Allowed Output Current at 24V<br>Mounting  6A<br>Orientation  E<br>(Horizontal ccw)<br>3.5A<br>0<br>+25 +60 +70°C<br>Ambient Temperature<br>INPUT Supply Power OUTPUT<br>OUTPUT Power Supply INPUT<br>INPUT<br>Supply<br>Power<br>OUTPUT<br>**----- End of picture text -----**<br>


October 2023/Rev. 1.3 NI PS-25    All parameters are typical values specified at 230 Vac, 50 Hz input voltage, 24 V, 5 A output load, 25 °C ambient and after a 5 minute run-in time unless otherwise noted. 

21/21