1170952

## **STEP3-PS/1AC/12DC/1.3/PT** 

## **Power supply unit** 

Data sheet 109403_en_00 © PHOENIX CONTACT 2021-04-29 

## **1 Description** 

The STEP POWER power supplies with Push-in connection technology are the professional solution for intelligent building automation. The compact devices are economical, space-saving, and flexible in application. 

## **Features** 

- Device design for use in surface-mounted or flushmounted distributors (VDE 0603-1, DIN 43871) 

- Energy savings with the highest level of efficiency in noload and part-load operation (Efficiency Level VI) 

- Space savings in the control cabinet due to the narrow design combined with increased performance (up to 100%) 

- Can be used throughout the world, thanks to the wide range input and comprehensive international approval package 

- Approval for household purposes (DIN EN 60335-1) allows use in domestic applications 

- Quick and easy startup with tool-free Push-in connection technology at a 45° angle with double terminal points 

## **Technical data (short form)** 

|Input voltage range|100 V AC ... 240 V AC -15 % ... +10 %|
|---|---|
||110 V DC ... 250 V DC -20 % ... +10 %|
|Mains buffering|typ. 20 ms (120 V AC)|
||typ. 85 ms (230 V AC)|
|Nominal output voltage (UN)<br>Nominal output current (IN)|12 V DC<br>1.3 A|
|Output power (PN)<br>Efficiency Level|15 W<br>VI|
|Efficiency (for nominal values)<br>Residual ripple<br>MTBF (IEC 61709, SN 29500)|> 85.5 % (120 V AC)<br>> 86 % (230 V AC)<br>typ. 150 mVPP<br>> 5880000 h (25 °C)|
||> 4278000 h (40 °C)|
||> 3039000 h (50 °C)|
|Ambient temperature (operation)|-10 °C ... 70 °C (Derating: > 50 °C; 2 %/K)|
|Startup type tested|-25 °C|
|Dimensions W x H x D|18 x 90 x 61 mm|
|Horizontal pitch ( DIN 43880 )|1 Div.|
|Weight|70 g|



- Flexible assembly - can be snapped onto the DIN rail or screwed onto a level surface 

All technical specifications are nominal and refer to a room temperature of 25 °C and 70% relative humidity at 100 m above sea level. 

**STEP3-PS/1AC/12DC/1.3/PT** 

|**2**|**Table of contents**|**Table of contents**|
|---|---|---|
|1|Description ..................................................................................................................................1||
|2|Table of contents.........................................................................................................................2||
|3|Ordering data ..............................................................................................................................4||
|4|Technical data.............................................................................................................................4||
|5|Safety|and installation notes......................................................................................................11|
|6|High-voltage test (HIPOT) .........................................................................................................12||
||6.1|High-voltage dielectric test (dielectric strength test) .....................................................................................12|
||6.2|High-voltage dielectric test during the manufacturing process......................................................................12|
||6.3|High-voltage dielectric test performed by the customer................................................................................12|
|||6.3.1<br>Performing high-voltage testing.........................................................................................................12|
|7|Design.......................................................................................................................................13||
||7.1|Rating plate ..................................................................................................................................................13|
||7.2|Device connections and functional elements................................................................................................13|
||7.3|Block diagram...............................................................................................................................................14|
||7.4|Device dimensions .......................................................................................................................................15|
|8|Mounting/remove.................................................................................................................................................15||
||8.1|Convection ...................................................................................................................................................15|
||8.2|Mounting position .........................................................................................................................................16|
||8.3|Installation height..........................................................................................................................................16|
||8.4|Keep-out areas.............................................................................................................................................16|
||8.5|Mounting the power supply unit ....................................................................................................................17|
|||8.5.1<br>Mounting on a DIN rail (integrated snap-on foot)...............................................................................17|
|||8.5.2<br>Screw fixing to the mounting surface (mounting flanges) ..................................................................17|
||8.6|Removing the power supply unit...................................................................................................................18|
|||8.6.1<br>DIN rail end mounting (integrated snap-on foot)................................................................................18|
|||8.6.2<br>Removal from the mounting surface (mounting flanges) ...................................................................18|
|9|Device connection terminal blocks.................................................................................................................19||
||9.1|AC input terminal blocks...............................................................................................................................19|
||9.2|Primary side connection and fuse protection ................................................................................................19|
|||9.2.1<br>1AC supply network ..........................................................................................................................19|
|||9.2.2<br>3AC supply network ..........................................................................................................................19|
|||9.2.3<br>DC supply network ............................................................................................................................20|
||9.3|DC output terminal blocks.............................................................................................................................20|
|||9.3.1<br>Wiring principle for DC output terminals ............................................................................................20|
|||9.3.2<br>Protection of the secondary side .......................................................................................................20|
|10|Function elements.....................................................................................................................21||
||10.1|Display element – DC OK LED .....................................................................................................................21|
|11|Output|characteristic curves.............................................................................................................................21|



PHOENIX CONTACT **2/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

||**STEP3-PS/1AC/12DC/1.3/PT**|**STEP3-PS/1AC/12DC/1.3/PT**|
|---|---|---|
|12|Connection versions ..................................................................................................................22||
||12.1|Increasing power.......................................................................................................................................... 22|
|||12.1.1 Series operation................................................................................................................................ 22|
|||12.1.2 Parallel operation .............................................................................................................................. 22|
||12.2|Redundant operation.................................................................................................................................... 22|
||12.3|Fundamental prerequisites for parallel operation (power increase, redundancy operation) ......................... 23|
|13|Derating.....................................................................................................................................23||
||13.1|Ambient temperature.................................................................................................................................... 23|
||13.2|Installation height ......................................................................................................................................... 23|
||13.3|Position-dependent derating ........................................................................................................................ 24|
|||13.3.1 Normal mounting position ................................................................................................................. 24|
|||13.3.2 Rotated mounting position 90° Z-axis ...............................................................................................24|
|||13.3.3 Rotated mounting position 180° Z-axis ............................................................................................. 25|
|||13.3.4 Rotated mounting position 270° Z-axis ............................................................................................. 25|
|||13.3.5 Rotated mounting position 90° X-axis ...............................................................................................26|
|||13.3.6 Rotated mounting position 270° X-axis ............................................................................................. 26|
|14|Application example ..................................................................................................................27||
||14.1|Power supply in a surface-mounted or flush-mounted distributor................................................................. 27|
|15|Disposal and recycling....................................................................................................................................... 27||



PHOENIX CONTACT **3/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

## **3 Ordering data** 

|**Description**|**Type**|**Order No.**|**Pcs./Pkt.**|
|---|---|---|---|
|Primary-switched power supply unit, STEP POWER,|STEP3-PS/1AC/12DC/1.3/PT|1170952|1|
|Push-in connection, DIN rail mounting, input: 1-phase,||||
|output: 12 V DC / 1.3 A||||
|||||
|**Accessories**|**Type**|**Order No.**|**Pcs./Pkt.**|
|Redundancy module, 5 ... 24 V DC, 2x 5 A, 1x 10 A|STEP-DIODE/5-24DC/2X5/|2868606|1|
||1X10|||
|The range of accessories is being continuously extended. The current range of accessories<br>the download area for the product.|||can be found in|



## **4 Technical data** 

|**Input data**||
|---|---|
|Unless otherwise stated, all data applies for 25°C ambient temperature, 230 V AC input voltage, and nominal||
|output current (IN).||
|Input voltage range|100 V AC ... 240 V AC -15 % ... +10 %|
||110 V DC ... 250 V DC -20 % ... +10 %|
|Frequency range (fN)|50 Hz ... 60 Hz ±10 %|
|Typical national grid voltage|120 V AC|
||230 V AC|
|Network type|Star network (TN, TT, IT (PE))|
|Current consumption|0.3 A (100 V AC)|
||0.17 A (240 V AC)|
||0.17 A (110 V DC)|
||0.08 A (250 V DC)|
|Discharge current to PE|< 0.25 mA|
|Mains buffering time|typ. 20 ms (120 V AC)|
||typ. 85 ms (230 V AC)|
|Switch-on time|typ. 2 s|
|Inrush current|typ. 27 A (25 °C)|
|Inrush current integral (I2t)|typ. 0.12 A2s|
|Device mains fuse , internal (device protection), slow-blow|1.25 A|
|During the first few microseconds, the current flow into the filter capacitors is excluded.||
|The SCCR (short-circuit current rating) value|of the power supply unit corresponds to the SCCR value of the|
|backup fuse.||



PHOENIX CONTACT **4/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

|**Input protection , AC/DC ( to be connected externally upstream )**|**Input protection , AC/DC ( to be connected externally upstream )**|**Input protection , AC/DC ( to be connected externally upstream )**|**Input protection , AC/DC ( to be connected externally upstream )**|**Input protection , AC/DC ( to be connected externally upstream )**|**Input protection , AC/DC ( to be connected externally upstream )**|**Input protection , AC/DC ( to be connected externally upstream )**|**Input protection , AC/DC ( to be connected externally upstream )**|**Input protection , AC/DC ( to be connected externally upstream )**|**Input protection , AC/DC ( to be connected externally upstream )**||
|---|---|---|---|---|---|---|---|---|---|---|
|**Input current IIn**<br>**Input protection**||||**Circuit breaker**|||||**Neozed fuse**<br>**or equivalent**|**Power switch**|
|**Characteristics**|||**A**|**B**|**C**|**D**|**K**||**gG**|**≤ 13 x IIn**<br>**(maximum magnetic tripping)**|
|||6 A|-||||||-|-|
|||8 A|-||||||-|-|
|||10 A|-||||||-|-|
|||13 A|-||||||-|-|
|||16 A|-||||||-|-|
|||20 A|-||||||-|-|
||||||||||||
|**Protective circuit**|||||||||||
|Type of protection|||||||||Transient surge protection||
|Protective circuit/component|||||||||Varistor||
||||||||||||
|**Electric strength of the insulation**|||||||||||
|||**Housing**|||||||||
||||||||||||
|||**Input**|||**Output**||||||
|||**1.2**<br>**1.1**<br>**L**|||||**2.2**<br>**2.1+**||||
|||**1.3**<br>**1.4**<br>**N**|**A**||||**2.4**<br>**2.3 -**||||
||||||||||||
||||||||||||
|||||||||||**A**|
|Type test (IEC/EN 61010-1:2010, section||||||6.8)|||4|kV AC|
|Production test|||||||||3.75 kV AC||



**==> picture [483 x 345] intentionally omitted <==**

**----- Start of picture text -----**<br>
Electric strength of the insulation<br>Housing<br>Input Output<br>L 1.11.2 2.12.2+<br>N1.31.4 A 2.32.4 -<br>A<br>Type test (IEC/EN 61010-1:2010, section 6.8) 4 kV AC<br>Production test 3.75 kV AC<br>POWER factor<br>0,65<br>0,6<br>0,55<br>�<br>0,5 �<br>0,45<br>0,4<br>0,35 �� == U U In In: 120 V AC/U: 230 V AC/U Out Out: 12 V DC: 12 V DC<br>0,3<br>0 0,25 0,5 0,75 1 1,25 1,5<br>IOut [A]<br>Power Factor<br>**----- End of picture text -----**<br>


**Crest factor 120 V AC 230 V AC** typ. 3.43 typ. 4.5 

PHOENIX CONTACT **5/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

**==> picture [483 x 141] intentionally omitted <==**

**----- Start of picture text -----**<br>
Input current vs. output current<br>0,3<br>0,25<br>0,2 �<br>0,15<br>0,1 �<br>0,05 � = UIn: 120 V AC/UOut: 12 V DC<br>� = UIn: 230 V AC/UOut: 12 V DC<br>0<br>0 0,2 0,4 0,6 0,8 1,0 1,2 1,4<br>IOut [A]<br> [A]<br>IIN<br>**----- End of picture text -----**<br>


|**Connection data input**||
|---|---|
|Connection method|Push-in connection|
|Stripping length|10 mm|
|Conductor cross section solid|0.2 mm² ... 2.5 mm²|
|Conductor cross section flexible|0.2 mm² ... 2.5 mm²|
|Flexible conductor cross section (ferrule with plastic|0.2 mm² ... 1 mm²|
|sleeve)||
|Flexible conductor cross section flexible (ferrule, w/o|0.5 mm² ... 2.5 mm²|
|plastic sleeve)||
|Conductor cross section AWG (Cu)|24 ... 14|
|||
|**Output data**||
|Nominal output voltage (UN)|12 V DC|
|Nominal output current (IN)|1.3 A|
|Control deviation|< 1 % (Static load change 10 % ... 90 %)|
||< 4 % (Dynamic load change 10 % ... 90 %, (10 Hz))|
||< 0.1 % (change in input voltage ±10 %)|
|Short-circuit-proof|yes|
|No-load proof|yes|
|Residual ripple|typ. 150 mVPP|
|Connection in parallel|yes, for increasing power and redundancy with diode|
|Connection in series|yes, for increased efficiency|
|Feedback voltage resistance|≤ 25 V DC|
|Protection against overvoltage at the output (OVP)|< 25 V DC|
|Rise time|typ. 100 ms (UOut= 10 % ... 90 %)|



PHOENIX CONTACT **6/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

|**Connection data output**|||
|---|---|---|
|Connection method|Push-in connection||
|Stripping length|10 mm||
|Conductor cross section solid|0.2 mm² ... 2.5 mm²||
|Conductor cross section flexible|0.2 mm² ... 2.5 mm²||
|Flexible conductor cross section (ferrule with plastic|0.2 mm² ... 1 mm²||
|sleeve)|||
|Flexible conductor cross section flexible (ferrule, w/o|0.5 mm² ... 2.5 mm²||
|plastic sleeve)|||
|Conductor cross section AWG (Cu)|24 ... 14||
||||
|**LED signaling**|||
|UOut> 0.9 x UN(UN= 12 V DC)|LED lights up green||
|UOut< 0.9 x UN(UN= 12 V DC)|LED off||
||||
|**Reliability**||**230 V AC**|
|MTBF (IEC 61709, SN 29500)||> 5880000 h (25 °C)|
|||> 4278000 h (40 °C)|
|||> 3039000 h (50 °C)|



**==> picture [483 x 357] intentionally omitted <==**

**----- Start of picture text -----**<br>
General data<br>Degree of protection IP20<br>Protection class II (in closed control cabinet)<br>Efficiency Level VI<br>Flammability rating UL 94 V0 (Housing, terminal blocks, base latches)<br>Housing material Polycarbonate<br>Foot latch material Polyamid<br>Dimensions (W x H x D) 18 x 90 x 61 mm<br>Device depth (DIN rail mounting) 55 mm<br>Horizontal pitch 1 Div. (DIN 43880)<br>Weight 70 g<br>Power dissipation 120 V AC 230 V AC<br>No load < 0.1 W < 0.1 W<br>Nominal load < 3.2 W < 3 W<br>Efficiency 120 V AC 230 V AC<br>   88 > 85.5 % (120 V AC) > 86 % (230 V AC)<br>   87 �<br>   86<br>   85<br>   84   83 �<br>   82<br>   81<br>   80 � = UIn: 120 V AC/UOut : 12 V DC<br>   79 � = U In : 230 V AC/U Out : 12 V DC<br>   78<br>0,13 0,38 0,63 0,88 1,13 1,38<br>IOut [A]<br>Eta [%]<br>**----- End of picture text -----**<br>


PHOENIX CONTACT **7/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

|**Ambient conditions**||
|---|---|
|Ambient temperature (operation)|-10 °C ... 70 °C (Derating: > 50 °C; 2 %/K)|
|The ambient temperature (operation) refers to IEC 61010 surrounding air temperature.||
|Ambient temperature (start-up type tested)|-25 °C|
|Ambient temperature (storage/transport)|-40 °C ... 85 °C|
|Max. permissible relative humidity (operation)|≤ 95 % (at 25 °C, non-condensing)|
|Installation height|≤ 4000 m (> 2000 m, Derating: 10 %/1000 m)|
|Vibration (operation)|< 15 Hz, amplitude ±2.5 mm (according to IEC 60068-2-6)|
||15 Hz ... 150 Hz, 2.3g, 90 min.|
|Shock|18 ms, 30g, in each space direction (according to IEC 60068-|
||2-27)|
|Degree of pollution|2|
|Climatic class|3K3 (EN 60721)|
|Overvoltage category||
|EN 61010-1|II (≤ 4000 m)|
|EN 62477-1|III (≤ 2000 m)|
|||
|**Standards/specifications**||
|Electrical safety|IEC 61010-1 (SELV)|
|Safety extra-low voltage|IEC 61010-1 (SELV) IEC 61010-2-201 (PELV)|
|Safe isolation|IEC 61558-2-16|
|Low-voltage power supplies, DC output|EN 61204-3|
|Safety requirements for electrical equipment for|IEC 61010-1|
|measurement, control, and laboratory use||
|Safety of electrical devices for household use and similar|DIN EN 60335-1|
|purposes||
|Electric vehicle conductive charging system - Part 21-2:|IEC 61851-21-2 (Class B)|
|EMC requirements for off board electric vehicle charging||
|systems||



## **Conformance/Approvals** 

|UL|UL 1310 Class 2 Power Units|
|---|---|
||UL/C-UL Listed UL 61010-1|
||UL/C-UL Listed UL 61010-2-201|
||UL/C-UL Listed ANSI/UL 121201 Class I, Division 2, Groups A,|
||B, C, D (Hazardous Location)|



## **Temperature class (ANSI/UL 121201)** 

Temp code T4 (-10...+70 °C; >50 °C, Derating: 2 %/K) 

Current approvals/permissions for the product can be found in the download area under phoenixcontact.net/products 

PHOENIX CONTACT **8/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

|**Electromagnetic compatibility**|||
|---|---|---|
|**Conformance with EMC Directive 2014/30/EU**|||
|**Noise emission according to EN 61000-6-3 (residential and commercial) and EN**||**61000-6-4 (industrial)**|
|**CE basic standard**|**Minimum normative**|**Higher requirements in**|
||**requirements**|**practice (covered)**|
|Conducted noise emission EN 55016|EN 61000-6-4 (Class A)|EN 61000-6-3 (Class B)|
|Noise emission EN 55016|EN 61000-6-4 (Class A)|EN 61000-6-3 (Class B)|
|Harmonic currents EN 61000-3-2|not required|EN 61000-3-2 (Class A)|
|Flicker EN 61000-3-3|not required|0 kHz ... 2 kHz|



|**EN 61000-6-2:2005**|||
|---|---|---|
|**CE basic standard**|**Minimum normative**|**Higher requirements in**|
||**requirements of EN 61000-**|**practice (covered)**|
||**6-2 (CE)**||
||**(immunity for industrial**||
||**environments)**||
|Electrostatic discharge EN 61000-4-2|||
|Housing contact discharge|4 kV (Test Level 2)|6 kV (Test Level 3)|
|Housing air discharge|8 kV (Test Level 3)|8 kV (Test Level 3)|
|Comments|Criterion B|Criterion A|
|Electromagnetic HF field EN 61000-4-3|||
|Frequency range|80 MHz ... 1 GHz|80 MHz ... 1 GHz|
|Test field strength|10 V/m (Test Level 3)|10 V/m (Test Level 3)|
|Frequency range|1.4 GHz ... 6 GHz|1 GHz ... 6 GHz|
|Test field strength|3 V/m (Test Level 2)|10 V/m (Test Level 3)|
|Comments|Criterion A|Criterion A|
|Fast transients (burst) EN 61000-4-4|||
|Input|asymmetrical 2 kV (Test Level|asymmetrical 4 kV (Test Level|
||3)|4)|
|Output|asymmetrical 1 kV (Test Level|asymmetrical 2 kV (Test Level|
||2)|3)|
|Comments|Criterion B|Criterion A|
|Surge voltage load (surge) EN 61000-4-5|||
|Input|symmetrical 1 kV (Test Level|symmetrical 2 kV (Test Level|
||3)|4)|
||asymmetrical 2 kV (Test Level|asymmetrical 4 kV (Test Level|
||3)|4)|
|Output|symmetrical 0.5 kV (Test Level|<br>symmetrical 1 kV (Test Level|
||2)|3)|
||asymmetrical 1 kV (Test Level|asymmetrical 2 kV (Test Level|
||2)|3)|
|Comments|Criterion B|Criterion A|



PHOENIX CONTACT **9/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

|**EN 61000-6-2:2005**||||
|---|---|---|---|
|**CE basic standard**||**Minimum normative**|**Higher requirements in**|
|||**requirements of EN 61000-**|**practice (covered)**|
|||**6-2 (CE)**||
|||**(immunity for industrial**||
|||**environments)**||
|Conducted interference EN 61000-4-6||||
||Input/output|asymmetrical|asymmetrical|
||Frequency range|0.15 MHz ... 80 MHz|0.15 MHz ... 80 MHz|
||Voltage|10 V (Test Level 3)|10 V (Test Level 3)|
||Comments|Criterion A|Criterion A|
|Voltage dips EN 61000-4-11||||
|Input voltage ( 230 V AC , 50 Hz )||||
||Voltage dip|70 % , 25 periods ( Class 3 )|70 % , 25 periods ( Class 3 )|
||Comments|Criterion C|Criterion A|
||Voltage dip|40 % , 10 periods ( Class 3 )|40 % , 10 periods ( Class 3 )|
||Comments|Criterion C|Criterion A|
||Voltage dip|0 % , 1 period ( Class 3 )|0 % , 1 period ( Class 3 )|
||Comments|Criterion B|Criterion A|
|||||
|**Key**||||
|Criterion A|Normal operating behavior within the specified limits.|||
|Criterion B|Temporary impairment to operational behavior that is corrected by the device itself.|||
|Criterion C|Temporary adverse effects on the operating behavior, which the device corrects|||
||automatically or which can be restored by actuating the operating elements.|||



PHOENIX CONTACT **10/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

## **5 Safety and installation notes** 

## **Symbols used** 

## **Safety notes and warning instructions** 

## **WARNING: Danger to life by electric shock!** 

Instructions and possible hazards are indicated by corresponding symbols in this document. 

This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety measures that follow this symbol to avoid possible personal injuries. 

There are different categories of personal injury that are indicated by a signal word. 

- Only skilled persons may install, start up, and operate the device. 

- Never carry out work when voltage is present. 

- Establish connection correctly and ensure protection against electric shock. 

- Cover termination area after installation in order to avoid accidental contact with live parts (e. g., installation in control cabinet). 

## **WARNING** 

This indicates a hazardous situation which, if not avoided, could result in death or serious injury. 

## **CAUTION** 

This indicates a hazardous situation which, if not avoided, could result in minor or moderate injury. 

The following symbols are used to indicate potential damage, malfunctions, or more detailed sources of information. 

## **NOTE** 

This symbol together with the signal word NOTE and the accompanying text alert the reader to a situation which may cause damage or malfunction to the device, hardware/software, or surrounding property. 

This symbol and the accompanying text provide the reader with additional information or refer to detailed sources of information. 

## **NOTE** 

- Observe the national safety and accident prevention regulations. 

- Assembly and electrical installation must correspond to the state of the art. 

- The power supply is a built-in device and is designed for mounting in a control cabinet. 

- The IP20 degree of protection of the device is intended for use in a clean and dry environment. 

- Observe mechanical and thermal limits. 

- Horizontal mounting position (normal mounting position) 

- Mount the power supply unit in the standard installation position. Position of the L/N connection terminal blocks at bottom. 

- Ensure that the primary-side wiring and secondary-side wiring are the correct size and have sufficient fuse protection. 

- For the connection parameters for wiring the power supply, such as the required stripping length with and without ferrule, refer to the technical data section. 

- Use copper cables for operating temperatures of  75 °C (ambient temperature  55 °C)  90 °C (ambient temperature  75 °C). 

- The power supply is approved for the connection to TN, TT and IT power grids (star networks) with a maximum phase-to-phase voltage of 240 V AC 

- Protect the device against foreign bodies penetrating it, e.g., paper clips or metal parts. 

- The power supply is maintenance-free. Repairs may only be carried out by the manufacturer. The warranty no longer applies if the housing is opened. 

- The power supply may only be used for its intended use. 

PHOENIX CONTACT **11/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

## **6 High-voltage test (HIPOT)** 

This protection class II power supply is subject to the Low Voltage Directive and is factory tested. During the HIPOT test (high-voltage test), the insulation between the input circuit and output circuit is tested for the prescribed electric strength values, for example. The test voltage in the highvoltage range is applied at the input and output terminal blocks of the power supply. The operating voltage used in normal operation is a lot lower than the test voltage used. 

- High-voltage tests can be performed as described. 

The test voltage should rise and fall in ramp form. The relevant rise and fall time of the ramp should be at least two seconds. 

## **6.1 High-voltage dielectric test (dielectric strength test)** 

In order to protect the user, power supplies (as electric components with a direct connection to potentially hazardous voltages) are subject to more stringent safety requirements. For this reason, permanent safe electrical isolation between the hazardous input voltage and the touch-proof output voltage as safety extra-low voltage (SELV) must always be ensured. 

In order to ensure permanent safe isolation of the AC input circuit and DC output circuit, high-voltage testing is performed as part of the safety approval process (type test) and manufacturing (routine test). 

## **6.2 High-voltage dielectric test during the manufacturing process** 

During the power supply manufacturing process, a highvoltage test is performed as part of the dielectric test in accordance with the specifications of IEC/UL/EN 61010-1. Routine manufacturing tests are inspected regularly by a certification authority. 

## **6.3 High-voltage dielectric test performed by the customer** 

Apart from routine and type tests to guarantee electrical safety, the end user does not have to perform another highvoltage test on the power supply as an individual component. According to EN 60204-1 (Safety of machinery - Electrical equipment of machines) the power supply can be disconnected during the high-voltage test and only installed once the high-voltage test has been completed. 

## **6.3.1 Performing high-voltage testing** 

If high-voltage testing of the control cabinet or the power supply as a stand-alone component is planned during final inspection and testing, the following features must be observed. 

- The power supply wiring must be implemented as shown in the wiring diagram. 

- The maximum permissible test voltages must not be exceeded. 

Avoid unnecessary loading or damage to the power supply due to excessive test voltages. 

- For the relevant applicable test voltages and insulation distances, refer to the corresponding table (see technical data: electric strength of the insulation section). 

Figure 1 Potential-related wiring for the high-voltage test 

**==> picture [113 x 170] intentionally omitted <==**

**----- Start of picture text -----**<br>
3<br>2.12.2 ++ 2.32.4 --<br>Output DC<br>12V 1.3A<br>DC OK<br>HV<br>2<br> /=<br>1.1 LInput 1AC1.3 N<br>1.2 L 1.4 N<br>1<br>Ord.No.1170952<br>STEP POWER<br>**----- End of picture text -----**<br>


## **Key** 

|**No.**|**Designation**|**Color coding**|**Potential lev-**<br>**els**|
|---|---|---|---|
|1|AC input circuit|Red|Potential 1|
|2|High-voltage<br>tester|--|--|
|3|DC output circuit|Blue|Potential 2|



PHOENIX CONTACT **12/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

## **7 Design** 

## **7.1 Rating plate** 

In accordance with the German Product Safety Law (ProdSG) it is only permissible to make such products available on the market if they meet certain safety standards. It must be ensured at all times that users are not exposed to hazards. 

In accordance with ProdSG, every device must therefore be fitted with a rating plate. All relevant information on the safe use of the device must also be included. 

The power supply device rating plate is located on the right-hand side of the housing (as viewed from the front). 

**==> picture [150 x 161] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 2 Rating plate information<br>PHOENIX CONTACT GmbH & Co. KG 1<br>Flachsmarktstraße 8<br>32825 Blomberg<br>Germany<br>www.phoenixcontact.com<br>Order-No.:<br>7 Input:<br>Output: 2<br>6<br>3<br>5<br>Read manual No.xxxxxxx beforeconnecting to mains<br>Lire manualxxxxxxxde raccorder au réseauMade in VietnamavantNo.de 4<br>YYYY/MM/DDX<br>Sno.: AAAAAAARRYYWWXSSSS<br>**----- End of picture text -----**<br>


## **7.2 Device connections and functional elements** 

Device connections are labeled with connection tags to ensure clear and definitive identification. 

The connection tags are split into the following connection levels: 

|**Connection**<br>**level**|<br>**Description**|
|---|---|
|1.x|Input|
|2.x|Output|



Figure 3 Location of functional elements and device connections **1 2** 

**==> picture [74 x 179] intentionally omitted <==**

**----- Start of picture text -----**<br>
2.12.2 ++ 2.32.4--<br>Output DC 3<br>12V 1.3A<br>DC OK 4<br>5<br>Input 1AC<br>1.1 L 1.3 N<br>1.2 L 1.4 N<br>6 2<br>STEP POWER<br>Ord.No.1170952<br>**----- End of picture text -----**<br>


## **Key** 

## **Key** 

|**No.**|**Designation**|
|---|---|
|1|Identification of the provider|
|2|Date of manufacture|
|3|Bar code and serial number for device identi-<br>fication|
|4|Designation of product-related device docu-<br>mentation|
|5|Device approvals|
|6|Ambient conditions|
|7|Device connection data|



|**No.**|**Designation**|**Connection**<br>**labeling**|
|---|---|---|
|1|Connection terminal block output<br>voltage: Output DC +/-|2.1 ... 2.4|
|2|Mounting flange for wall mounting<br>(back of device)|--|
|3|Signaling DC OK LED|--|
|4|Integrated snap-on foot for DIN rail<br>mounting (back of device)|--|
|5|QR code web link|--|
|6|Connection terminal block input volt-<br>age: Input L/N|1.1 ... 1.4|



PHOENIX CONTACT **13/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

## **7.3 Block diagram** 

**==> picture [231 x 134] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 4 Block diagram<br>Input AC Output DC<br>L 1.11.2 2.12.2 +<br>Filter Filter<br>N 1.31.4 2.32.4 -<br>Functions User Interface<br>UVP OVP OTP OCP SCP<br>DC OK<br>**----- End of picture text -----**<br>


## **Key** 

**==> picture [234 x 238] intentionally omitted <==**

**----- Start of picture text -----**<br>
Symbol Designation – Input AC, Output DC<br>Input fuse, internal device protection<br>EMC filter<br>Filter<br>Rectification<br>Switching transistor<br>Transmitter with electrical isolation<br>Smoothing capacitor<br>Control equipment<br>**----- End of picture text -----**<br>


**==> picture [234 x 269] intentionally omitted <==**

**----- Start of picture text -----**<br>
Symbol Designation – Functions<br>Undervoltage protection protects the AC<br>UVP input of the power supply against damage in<br>the event of an AC undervoltage.<br>Overvoltage protection protects the DC out-<br>OVP put of the power supply and the connected<br>load against damage in the event of an over-<br>voltage<br>Overtemperature protection protects the<br>OTP power supply against damage in the event of<br>impermissibly high intrinsic external heating.<br>Overcurrent protection protects the DC out-<br>OCP put of the power supply against damage in<br>the event of an impermissibly high current<br>load.<br>Short-circuit protection protects the DC out-<br>SCP put of the power supply against damage in<br>the vent of an output-side short circuit.<br>Symbol Designation – User interface<br>DC OK LED, indicates the operating status of<br>the power supply<br>DC OK<br>**----- End of picture text -----**<br>


PHOENIX CONTACT **14/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

## **7.4 Device dimensions** 

Figure 5 Device dimensions (dimensions in mm) 

**==> picture [103 x 180] intentionally omitted <==**

**----- Start of picture text -----**<br>
18<br>2.1 + 2.3 -<br>2.2 + 2.4 -<br>Output DC<br>12V 1.3A<br>DC OK<br>Input 1AC<br>1.1 L 1.3 N<br>1.2 L 1.4 N<br>45<br>Ord.No.1170952<br>90<br>STEP POWER<br>**----- End of picture text -----**<br>


Figure 6 Device dimensions (dimensions in mm) 

**==> picture [87 x 181] intentionally omitted <==**

**----- Start of picture text -----**<br>
61<br>50<br>44<br>55<br>**----- End of picture text -----**<br>


## **8 Mounting/remove** 

The fanless convection-cooled power supply can be snapped onto 35 mm DIN rails with a top hat profile (TH 357.5 / TH 35-15) in accordance with EN 60715. 

## **8.1 Convection** 

To ensure sufficient convection, a minimum clearance is necessary between the power supply and above/below the installed devices. The minimum clearances are rated based on the standard mounting position with nominal power supply operation (see section: Restricted areas). 

Figure 7 Schematic diagram of the convection cooling 

**==> picture [36 x 63] intentionally omitted <==**

**==> picture [28 x 81] intentionally omitted <==**

**----- Start of picture text -----**<br>
DC OK<br>2.1+   2.3 –<br>   12V 1.3A<br>Output DC2.2+  2.4 –<br>.4 N<br>OEWRdN11r7o0952..<br>OP<br>PETS<br>**----- End of picture text -----**<br>


PHOENIX CONTACT **15/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

## **8.2 Mounting position** 

## **8.4 Keep-out areas** 

The specified technical data for the power supply is based on nominal operation in the standard mounting position. Any different technical data based on deviating mounting positions or other ambient conditions is labeled accordingly (see section: Derating). 

Figure 9 Device dimensions and minimum keep-out areas (in mm) 

**==> picture [283 x 239] intentionally omitted <==**

**----- Start of picture text -----**<br>
18<br>Power supply installed in the normal mounting<br>2.12.2 ++ 2.32.4 --<br>Output DC<br>12V 1.3A<br>DC OK<br>1.1 LInput 1AC1.3 N<br>1.2 L 1.4 N<br>DC OK<br>2.1+   2.3 –<br>   12V 1.3A<br>Output DC2.2+  2.4 –<br>.4 N<br>OERdN11r7o0952..<br>30<br>75<br>Ord.No.1170952<br>150<br>STEP POWER<br>W<br>OP<br>PETS<br>**----- End of picture text -----**<br>


Figure 8 Power supply installed in the normal mounting position 

## **8.3 Installation height** 

You can operate the power supply without power limitations up to an installation altitude of 2000 m. For altitudes higher than 2000 m, different specifications apply due to the differing air pressure and the reduced convection cooling associated with this (see section: Derating). 

PHOENIX CONTACT **16/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

## **8.5 Mounting the power supply unit** 

## **8.5.1 Mounting on a DIN rail (integrated snap-on foot)** 

- To mount the power supply on a DIN rail, proceed as follows: 

1. In the standard mounting position, the power supply is mounted on the DIN rail from the front. When doing so, ensure that the snap-on foot rests completely on the DIN rail (A). 

2. Then push the power supply onto the DIN rail until the snap-on foot audibly snaps into place (B). 

3. Check that the power supply is securely attached to the DIN rail. 

Figure 10 Snapping the power supply onto the DIN rail 

## **8.5.2 Screw fixing to the mounting surface (mounting flanges)** 

To mount the power supply with screws directly on the mounting surface, proceed as follows: 

1. Two M4 cylinder screws (DIN EN ISO 1207) are needed to screw-mount the power supply. 

2. Drill two fixing holes with M4 threads and a hole clearance of 98 mm in the mounting location. 

3. Push the mounting flanges (orange base latch) for fixing to the mounting surface upwards and downwards out of the housing base. 

4. Screw the power supply onto the mounting surface using the two M4 cylinder screws. 

5. Check that the power supply is securely attached to the mounting surface. 

**==> picture [61 x 96] intentionally omitted <==**

**==> picture [122 x 124] intentionally omitted <==**

**----- Start of picture text -----**<br>
A<br>PUSH<br>B<br>Click<br>**----- End of picture text -----**<br>


Figure 11 Screw fixing of the power supply to the mounting surface 

**==> picture [195 x 133] intentionally omitted <==**

**----- Start of picture text -----**<br>
M4<br>B<br>M4<br>A<br>PUSH<br>98<br>**----- End of picture text -----**<br>


- The power supply housing has been designed so that it can also be mounted and operated in a surface-mounted or flush-mounted distributor in accordance with VDE 0603-1 or DIN 43871. The power supply is mounted via the integrated snapon foot directly onto the DIN rail of the surfacemounted or flush-mounted distributor (see section: Application example). 

PHOENIX CONTACT **17/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

## **8.6 Removing the power supply unit** 

## **8.6.2 Removal from the mounting surface (mounting flanges)** 

## **8.6.1 DIN rail end mounting (integrated snap-on foot)** 

To remove the power supply from the DIN rail, proceed as follows: 

1. Take a suitable screwdriver and insert it into the interlock opening on the snap-on foot. 

2. Release the latch by levering the screwdriver downwards (A). 

3. Carefully swivel the power supply downwards (B) and let the interlock slide back into the starting position. 

4. Then lift the power supply from the DIN rail. 

- Figure 12 Removing the power supply from the DIN rail 

**==> picture [120 x 138] intentionally omitted <==**

**----- Start of picture text -----**<br>
A<br>B<br>**----- End of picture text -----**<br>


WARNING: Danger due to short circuit 

When unscrewing and removing the M4 cylinder screws, ensure that none fall into your application. 

To remove the power supply from the mounting surface, proceed as follows: 

1. Unscrew one of the two M4 cylinder screws used to attach the power supply. 

2. Remove the M4 cylinder screw. 

3. Unscrew the second M4 cylinder screw and then remove the power supply. 

Figure 13 Loosening the screw fixing of the power supply 

**==> picture [81 x 60] intentionally omitted <==**

PHOENIX CONTACT **18/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

## **9 Device connection terminal blocks** 

The front-mounted AC input terminal blocks and DC output terminal blocks of the power supply feature Push-in connection technology. No tools are necessary for wiring the primary and secondary side connection terminal blocks. 

For the necessary connection parameters for the connection terminal blocks, refer to the technical data section. 

## **9.1 AC input terminal blocks** 

The power supply is designed such that it can be operated on single-phase AC supply systems or on two phase conductors of three-phase systems. Here, the star supply system supports various supply system configurations, for example TT, TN, and IT systems. 

The power supply is connected on the primary side via the Input AC connection terminal blocks (connection level 1.x, input). 

The AC input terminal points and DC output terminal points of the Push-in connection terminal blocks are aligned at a 45° angle. This increases the number of non-isolated terminal points. No tools are necessary for wiring the primary and secondary side connection terminal blocks. 

The power supply is approved for connection to TN, TT, and IT power grids with a maximum phase-to-phase voltage of 240 V AC. 

Figure 14 Position of the AC input terminal blocks 

## **9.2 Primary side connection and fuse protection** 

The installation of the power supply must conform to the regulations of EN 61010. It must be possible to switch the power supply off using a suitable disconnection device outside of the power supply. The line protection on the primary side is suitable for this (see section: Technical data). 

## **9.2.1 1AC supply network** 

Figure 15 Schematic diagram, single-phase fuse protection 

**==> picture [170 x 117] intentionally omitted <==**

**----- Start of picture text -----**<br>
TT / TN / IT (PE) TN-C<br>Input 1AC Input 1AC<br>1.1L 1.3N 1.1L 1.3N<br>1.2L 1.4N 1.2L 1.4N<br>L1 L1<br>L2 L2<br>L3 L3<br>N N<br>PE PEN PE<br>**----- End of picture text -----**<br>


## **9.2.2 3AC supply network** 

## **DANGER: Hazardous voltage** 

When operating the power supply on a threephase system, observe the maximum permissible phase-to-phase voltage (see section: Technical data). 

The primary-side fuse protection in two-phase operation must be cover all poles. 

Figure 16 Schematic diagram, two-phase fuse protection 

**==> picture [50 x 122] intentionally omitted <==**

**----- Start of picture text -----**<br>
Output DC2.12.2 ++ 2.32.4 --<br>12V 1.3A<br>DC OK<br>1.1 L1.2 LInput 1AC1.3 N1.4 N<br>Ord.No.1170952<br>STEP POWER<br>**----- End of picture text -----**<br>


**==> picture [170 x 117] intentionally omitted <==**

**----- Start of picture text -----**<br>
TT / TN / IT (PE) TN-C<br>Input 2AC Input 2AC<br>1.1L 1.3N 1.1L 1.3N<br>1.2L 1.4N 1.2L 1.4N<br>L1 L1<br>L2 L2<br>L3 L3<br>N N<br>PE PEN PE<br>**----- End of picture text -----**<br>


PHOENIX CONTACT **19/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

## **9.2.3 DC supply network** 

## **DANGER: Hazardous voltage** 

When operating the power supply on a DC voltage system, observe the maximum permissible input voltage (see section: Technical data). 

The primary-side fuse protection in DC operation must cover all poles. 

## **9.3.1 Wiring principle for DC output terminals** 

The power supply has two separate connection terminal blocks with positive and negative potentials for supplying DC loads. Connect the DC loads to be supplied to these connection terminal blocks. 

Figure 19 Wiring principle for DC output terminal blocks 

**==> picture [23 x 14] intentionally omitted <==**

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


## **NOTE: Damage possible if an incorrect fuse is used** 

In DC operation, only use fuses that are approved for DC voltages. 

Figure 17 Schematic diagram, two-phase fuse protection 

**==> picture [64 x 80] intentionally omitted <==**

**----- Start of picture text -----**<br>
Input DC<br>1.1L 1.3L<br>1.2L 1.4L<br>+<br>**----- End of picture text -----**<br>


## **9.3 DC output terminal blocks** 

Connect the DC load to be supplied to the Output DC connection terminal blocks (connection level 2.x, output). By default, the power supply is preset to a nominal output voltage of 12 V DC. The level of the DC output voltage cannot be changed. 

**==> picture [44 x 29] intentionally omitted <==**

**----- Start of picture text -----**<br>
2.1+ 2.3 –<br>2.2+ 2.4 –<br>Output DC<br>**----- End of picture text -----**<br>


## **9.3.2 Protection of the secondary side** 

The power supply is electronically short-circuit-proof and no-load-proof. In the event of an error, the output voltage is limited 

If sufficiently long connecting cables are used, fuse protection does not have to be provided for each individual load. 

Figure 18 Position of DC output terminals 

**==> picture [45 x 122] intentionally omitted <==**

**----- Start of picture text -----**<br>
Output DC2.12.2 ++ 2.32.4 --<br>12V 1.3A<br>DC OK<br>1.1 L1.2 LInput 1AC1.3 N1.4 N<br>Ord.No.1170952<br>STEP POWER<br>**----- End of picture text -----**<br>


**==> picture [47 x 59] intentionally omitted <==**

PHOENIX CONTACT **20/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

## **10 Function elements** 

The functional elements of the power supply are located on the front of the housing of the power supply and are categorized as follows: 

- Display element 

## **10.1 Display element – DC OK LED** 

A DC OK LED is available for preventive function monitoring of the power supply. Through various different signals, the DC OK LED provides information on the operating status of the power supply. 

The possible DC OK statuses are to be found in the following table: 

|**DC OK LED**|**Description**|
|---|---|
||Primary-side AC supply is not available<br>or too low.|
||Power supply in overload operation<br>UOUT<0.9 x UN(UN= 12 V DC)|
||Power supply in normal operation UOUT<br>>0.9 x UN(UN= 12 V DC)|



##  = off,  = on (green) 

Figure 20 DC OK LED 

DC OK 

## **11 Output characteristic curves** 

In normal operation, the power supply supplies the output power in accordance with the device nominal data. If the DC output current supplying the loads increases to an impermissibly high level due to a fault, the power supply disconnects the DC output. The power supply remains in operation, despite the functional disturbance. 

The green DC OK LED is deactivated (see section: Function elements, display element – DC OK LED). 

In HICCUP mode, the power supply attempts to return to the conditions present prior to the detected current increase cyclically. This procedure is repeated until the cause of the current increase due to overload or short circuit has been remedied. The power supply then automatically switches back to normal operation. The DC OK LED is reactivated. 

**==> picture [218 x 246] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 21 Schematic diagram, HICCUP mode in the<br>event of overload<br>UN<br>UN 50%<br>2<br>0 I N<br>I Out [A]<br>ISC<br>T1 T2 T1 T2<br>0<br>t [s]<br> [V]<br>Out<br>U<br> [A]<br>IOut<br>**----- End of picture text -----**<br>


|**Marking**|**Value**|**Description**|
|---|---|---|
|ISC||Maximum output current<br>(short-circuit current) in<br>HICCUP mode|
|T1|100 ms|Pulse time (ON) in HIC-<br>CUP mode|
|T2|200 ms|Pause time (OFF) in HIC-<br>CUP mode|



PHOENIX CONTACT **21/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

## **12 Connection versions** 

Depending on how you intend to use your power supply, there are different ways of connecting the DC output side. 

A distinction is made between the following modes of use: 

- Power increase 

- Redundancy operation 

## **12.1 Increasing power** 

Depending on the respective mode of use, the power is increased either via the series- or parallel connection of two power supplies. 

## **12.1.1 Series operation** 

To increase the DC output power in dependence of the output voltage, connect two power supplies in series operation. Only use power supplies of the same type and performance class with identical configurations. 

Depending on the common output-side ground reference point of the power supplies, the following DC output voltage potentials are possible: 

- +24 V DC 

- -24 V DC 

- ±12 V DC 

- Figure 22 Schematic diagram, power increase in series operation 

**==> picture [139 x 233] intentionally omitted <==**

**----- Start of picture text -----**<br>
+24 V DC<br>RLoad<br>+ - + -<br>Output DC Output DC<br>-24 V DC<br>RLoad<br>+ - + -<br>Output DC Output DC<br>+12 V DC -12 V DC<br>RLoad RLoad<br>+ - + -<br>Output DC Output DC<br>**----- End of picture text -----**<br>


## **12.1.2 Parallel operation** 

When n power supply DC outputs are connected in parallel, the output current is increased to n x IN. Parallel connection for increased power is used when extending existing systems. If the individual power supply does not cover the current consumption of the most powerful load, parallel connection of power supplies is recommended. 

Figure 23 Schematic diagram, power increase in parallel operation 

**==> picture [139 x 80] intentionally omitted <==**

**----- Start of picture text -----**<br>
RLoad<br>+ - + -<br>Output DC Output DC<br>**----- End of picture text -----**<br>


## **12.2 Redundant operation** 

Redundant circuits are suitable for the DC supply of systems and system parts which place particularly high demands on operational safety. If the DC load is to be supplied with 1+1 redundancy, two power supplies of the same type and performance class with identical configurations must be used. 

In the event of an error, it must be ensured that one of the power supplies is able to provide the total required output power for the DC load to be supplied. The output power required for normal operation is thus provided by two power supplies connected in parallel on the output side. In normal operation, each of the two power supplies will be utilized by up to 50%. 

- A suitable selection of redundancy modules (active or passive) is to be found in the section: Ordering data, Accessories. 

Figure 24 Schematic diagram, 1+1 redundancy with redundancy module (active or passive) 

**==> picture [149 x 114] intentionally omitted <==**

**----- Start of picture text -----**<br>
R Load<br>+ - + -<br>Output DC Output DC<br>**----- End of picture text -----**<br>


PHOENIX CONTACT **22/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

## **12.3 Fundamental prerequisites for parallel operation (power increase, redundancy operation)** 

In order to ensure correct parallel operation, observe the following rules: 

**DC output voltage:** On each of the power supplies, set the DC voltage in idle mode such that the voltage values are identical. Take any voltage drops occurring due to long cable lengths into consideration. 

**Cable lengths:** To ensure the symmetrical utilization of he power supplies, the connecting cables for supplying the DC load must be identical in length. 

**Cable cross sections:** The connecting cables for supplying the DC load must be rated for the maximum occurring total current of all power supplies. This also applies for redundancy operation, whereby the individual power supply only supplies 50% of the DC load. 

**Ambient conditions:** Select the installation location of the power supplies such that the prevailing ambient conditions are identical. This is of particular importance if the power supplies are installed in different mounting locations. Large temperature differences between the mounting locations have a negative effect on the operating points of the power supplies. This will result in the operating behavior of the power supplies no longer being identical. 

If more than two power supplies are connected in parallel for the required power increase, fusing the DC outputs separately is recommended. Use appropriate miniature circuit breakers (MCBs) for this. As an alternative, the DC outputs can be decoupled from one another using redundancy modules (active or passive). 

## **13 Derating** 

## **13.1 Ambient temperature** 

When mounted in the standard mounting position and operated within the permissible temperature range for nominal operation, the power supply provides full output power. If the power supply is operated beyond the temperature range for nominal values, note the reduced output power for the supply of DC loads. 

## **NOTE: Damage due to thermal overload** 

If the power supply is operated in a different temperature range, only a reduced amount of power can be drawn. Otherwise, the power supply will be thermally loaded disproportionately and the device service life significantly reduced. This thermal load may even damage the power supply such that it is no longer operational. 

**==> picture [233 x 147] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 25 Output power depending on the ambient<br>temperature<br>����� ����<br>�����������������������<br>���<br>��� �� ��<br>������<br>���<br>�����<br>**----- End of picture text -----**<br>


## **13.2 Installation height** 

The power supply can be operated at an installation height of up to 2000 m without any limitations. Different data applies for installation locations above 2000 m due to the differing air pressure and the reduced convection cooling associated with this. 

Figure 26 Output power depending on the installation height 

**==> picture [226 x 122] intentionally omitted <==**

**----- Start of picture text -----**<br>
120<br>110<br>100<br>90<br>80<br>70<br>60<br>50 P N 100 % � 50 °C<br>0 1000 2000 3000 4000 5000<br>H [m]<br>[%]<br>P<br>Out<br>**----- End of picture text -----**<br>


PHOENIX CONTACT **23/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

## **13.3 Position-dependent derating** 

In order that you can use the nominal power of the power supply without limitation, the power supply should always be mounted in the standard mounting position. Sufficient device-side convection is always assured if the power supply is mounted in the standard mounting position and the necessary restricted areas are observed. 

## **NOTE: Damage due to thermal overload** 

If the supply is mounted in a different mounting position, only a reduced amount of power can be drawn. Otherwise, the power supply will be thermally loaded disproportionately and the device service life significantly reduced. 

## **13.3.1 Normal mounting position** 

**==> picture [430 x 158] intentionally omitted <==**

**----- Start of picture text -----**<br>
IN 100%<br>60%<br>-10 50 70<br>[°C]<br>Z<br>DC OK<br>Output DC2.2+  2.4 –<br>.4 N<br>12V 1.3A<br>2.1+   2.3 –<br>Y<br>X<br>ORdN1170952ro..<br>[A]<br>OEWP<br>PETS<br>**----- End of picture text -----**<br>


## **13.3.2 Rotated mounting position 90° Z-axis** 

**==> picture [430 x 155] intentionally omitted <==**

**----- Start of picture text -----**<br>
IN 100%<br>50%<br>-10 45 70<br>[°C]<br>o.1170952<br>Z<br>Y<br>X<br>WER Ord.N<br>STEP PO<br>Output DC2.2 +2.4 – 2.1 +2.3 –<br>[A]<br>DC OK .3A12V1<br>**----- End of picture text -----**<br>


PHOENIX CONTACT **24/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

## **13.3.3 Rotated mounting position 180° Z-axis** 

**==> picture [430 x 158] intentionally omitted <==**

**----- Start of picture text -----**<br>
IN 100%<br>40%<br>-10 40 70<br>[°C]<br>Z<br>Y<br>X<br>NO.1170952<br>ER<br>ORD.<br>[A]<br>WOTEP PS<br>1.4 N1.3 NInput 1AC1.2 L1.1 L<br>DC OK<br>A12V1 3.<br>2.1+2<br>**----- End of picture text -----**<br>


## **13.3.4 Rotated mounting position 270° Z-axis** 

**==> picture [430 x 155] intentionally omitted <==**

**----- Start of picture text -----**<br>
IN 100%<br>50%<br>-10 45 70<br>[°C]<br>Z<br>Y<br>X<br>[A]<br>.3A2V11 DC OK<br>Input 1AC1.3 N1.1 L 1.4 N1.2 L<br>1170952.o Ord.NREW POPTES<br>**----- End of picture text -----**<br>


PHOENIX CONTACT **25/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

## **13.3.5 Rotated mounting position 90° X-axis** 

**==> picture [430 x 158] intentionally omitted <==**

**----- Start of picture text -----**<br>
IN 100%<br>50%<br>-10 45 70<br>[°C]<br>1170952<br>1.2 L1.1 LInput1.4 N1.31ACN<br>ER Ord.No.<br>DC OK12V1.3A<br>Z<br>Y<br>X<br>STEP POW<br>[A]<br>**----- End of picture text -----**<br>


## **13.3.6 Rotated mounting position 270° X-axis** 

**==> picture [23 x 43] intentionally omitted <==**

**----- Start of picture text -----**<br>
Z<br>Y<br>X<br>**----- End of picture text -----**<br>


**==> picture [131 x 123] intentionally omitted <==**

**==> picture [222 x 132] intentionally omitted <==**

**----- Start of picture text -----**<br>
IN 100%<br>50%<br>-10 45 70<br>[°C]<br>[A]<br>**----- End of picture text -----**<br>


PHOENIX CONTACT **26/27** 

**109403_en_00** 

**STEP3-PS/1AC/12DC/1.3/PT** 

## **14 Application example** 

The individual performance classes of the STEP POWER power supplies have been designed such that the different housing widths are dimensioned in complete horizontal pitches (DIN 43880). Here, one horizontal pitch (1 HP) is 18 mm. 

You can therefore install any possible combination in surface-mounted or flush mounted distributors (VDE 06031, DIN 43871). 

## **15 Disposal and recycling** 

## **Ensure the correct disposal of electronic components** 

- Do not dispose of the power supply as household waste. 

Observe the applicable national standards and regulations. 

## **Ensure correct disposal or recycling** 

- The procedure for mounting the power supply in a surface-mounted or flush-mounted distributor is identical to that for DIN rail mounting (see section: Mounting the power supply). 

- Dispose of or recycle packaging material that is no longer needed as household waste. 

- Observe the applicable national standards and regulations. 

## **14.1 Power supply in a surface-mounted or flushmounted distributor** 

- Figure 27 Schematic diagram, STEP POWER (4 HP) in a flush-mounted distributor (12 HP) 

**==> picture [212 x 262] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.1 L   1.3 N1.2 L   1.4 N Input 1AC<br>22-27V<br>DC OK24V 5A<br>1.1 L   1.3 N1.2 L   1.4 NInput 1AC<br>class 2 output<br>24V 3.75A DC OK<br>1.1 L   1.3 N1.2 L   1.4 N Input 1AC<br>22-27V<br>DC OK24V 4A<br>1<br>2<br>3<br>4<br>5<br>6<br>7<br>8<br>9 10<br>11<br>12<br>           Output DC2.2 + 2.4 + 2.6 – 2.8 –2.1 + 2.3 + 2.5 – 2.7 – –<br>2.2 + 2.4 + 2.6 – 2.8 –2.1 + 2.3 + 2.5 – 2.7 –Output DC<br>        Output DC2.2 + 2.4 + 2.6 – 2.8 –2.1 + 2.3 + 2.5 – 2.7 – –<br>114o0066.<br>108o8478.<br>108o8486.<br>OREdNr.<br>OREdNr.<br>OREdNr.<br>OWP<br>OWP<br>OWP<br>PETS<br>PETS<br>PETS<br>**----- End of picture text -----**<br>


**PHOENIX CONTACT GmbH & Co. KG • 32823 Blomberg • Germany phoenixcontact.com** 

**27/27** 

**109403_en_00**