DRC-24V10W1AZ

**TECHNICAL DATASHEET** 

## **Chrome DIN Rail Power Supply** 

24V 10W 1 Phase (Class II & NEC Class 2) / DRC-24V10W1A □ 

**==> picture [182 x 233] intentionally omitted <==**

**----- Start of picture text -----**<br>
%<br>*This picture is for reference to DRC-24V10W series only.<br>**----- End of picture text -----**<br>


- **Highlights & Features** • Class II, Double Isolation (No Earth connection is required) 

- • Universal AC input voltage range and full power up to 55°C • Power will not de-rate for the entire input voltage range • Efficiency > 80.0% @ 115Vac & 230Vac • NEC Class 2 / Limited Power Source (LPS) certified • Overvoltage / Overcurrent / Over Temperature Protections 

- **Safety Standards** CB Certified for worldwide use CE Ads O **Model Number:** DRC-24V10W1A□ **Unit Weight:** 0.065 kg (0.14 lb) **Dimensions (L x W x D):** 91 x 18 x 55.6 mm (3.58 x 0.71 x 2.19 inch) 

- Universal AC input voltage range and full power up to 55°C 

CB Certified for worldwide use 

## **General Description** 

The DRC-24V10W1A□ is part of the Chrome DIN Rail Power Supply series, which is designed for use in compact cabinets for home automations and the food and beverage industry. Delta’s Chrome DIN Rail Power Supply series offers double isolated input. This means that no Earth connection is required thus resulting in low leakage current. This product provides a universal input voltage range of 90264Vac, and a wide temperature range of -25°C to 71°C. The Chrome series is certified to safety standard according to IEC/EN/UL 60950-1 Information Technology Equipment (ITE) and UL 508 Industrial Control Equipment (ICE). The series is also fully compliant with RoHS Directive 2011/65/EU for environmental protection. NEC Class 2 and Limited Power Source (LPS) approvals are available for this product. 

## **Model Information** 

Chrome DIN Rail Power Supply 

|**ModelNumber**|**Input Voltage Range**|**Rated OutputVoltage**|**Rated Output Current**|
|---|---|---|---|
|DRC-24V10W1A□|90-264Vac(125-375Vdc)|24Vdc|0.42A|



## **Model Numbering** 

|**DR**|**C –**|**24V**|**10W**|**1**|**A**|□|
|---|---|---|---|---|---|---|
|DIN Rail|Product Series<br>C – Isolation Class II<br>Power Supply|Output Voltage|Output Power<br>(10W series)|Single Phase|No PFC|Z – Black Plastic Case<br>G – Grey Plastic Case|



All parameters are specified at 25°C ambient and AC input unless otherwise indicated. **www.DeltaPSU.com (December 2018, Rev. 03)** 

1 

**TECHNICAL DATASHEET** 

## **Chrome DIN Rail Power Supply** 

## 24V 10W 1 Phase (Class II & NEC Class 2) / DRC-24V10W1A □ 

## **Specifications** 

Input Ratings / Characteristics 

|**Specifications**<br>Input Ratings / Characteristics||
|---|---|
|Nominal Input Voltage|100-240Vac|
|Input Voltage Range|90-264Vac|
|Nominal Input Frequency|50-60Hz|
|Input FrequencyRange|47-63Hz|
|Nominal DC Input Voltage*|125-375Vdc|
|Input Current|< 0.30A@115Vac, < 0.20A@230Vac|
|Efficiencyat 100% Load|> 80.0%@115Vac & 230Vac|
|Max Inrush Current (Cold Start)|< 15A @ 115Vac, < 30A @ 230Vac|
|Leakage Current|< 0.25mA@240Vac|



* Fulfills test conditions for DC input. Safety approval for DC input can be obtained upon request. 

## Output Ratings / Characteristics** 

|Output Ratings / Characteristics**|Output Ratings / Characteristics**||
|---|---|---|
|Nominal Output Voltage||24Vdc|
|Factory Set Point Tolerance|No potentiometer|24Vdc ± 2%|
|Output Current||0-0.42A(10W max.)|
|Output Power||10W|
|Line Regulation||< 0.5%(@90-264Vac input, 100% load)|
|Load Regulation||< 1%(@90-264Vac input, 0-100% load)|
|PARD***(20MHz)||< 100mVpp|
|Rise Time||< 70ms@nominal input(100% load)|
|Start-up Time||< 2,000ms @ nominal input (100% load)|
|Hold-up Time||> 10ms @ 115Vac (100% load)<br>> 60ms @ 230Vac (100% load)|
|Dynamic Response (Overshoot & Undershoot O/P Voltage)||± 5% @ 90-264Vac input, 10-100% load<br>(Slew Rate: 0.1A/μS, 50% duty cycle @ 5Hz to 100Hz)|
|Start-upwith Capacitive Loads||3,000µF Max|



**For power de-rating from 55°C to 71°C, see power de-rating on page 3. 

***PARD is measured with an AC coupling mode, 5cm wires, and in parallel with 0.1μF ceramic capacitor & 47μF electrolytic capacitor. 

All parameters are specified at 25°C ambient and AC input unless otherwise indicated. **www.DeltaPSU.com (December 2018, Rev. 03)** 

2 

**TECHNICAL DATASHEET** 

24V 10W 1 Phase (Class II & NEC Class 2) / DRC-24V10W1A □ 

## **Chrome DIN Rail Power Supply** 

## Mechanical 

|Mechanical|Mechanical||
|---|---|---|
|Case Cover||Plastic|
|Dimensions (L x W x D)||91 x 18 x 55.6 mm (3.58 x 0.71 x 2.19 inch)|
|Unit Weight||0.065 kg (0.14 lb)|
|Indicator||Green LED(DC OK)|
|CoolingSystem||Convection|
|Terminal|Input|M4 x 2 Pins(Rated 300V/16A)|
||Output|M4 x 2 Pins(Rated 300V/16A)|
|Wire|Input / Output|AWG 26-12|
|MountingRail||Standard TS35 DIN Rail in accordance with EN 60715|
|Noise(1 Meter frompower supply)||Sound Pressure Level(SPL)< 25dBA|



## Environment 

|Environment|||
|---|---|---|
|Surrounding Air Temperature|Operating|-25°C to +71°C|
||Storage|-25°C to +85°C|
|Power De-rating||> 55°C de-rate power by 2.5% / °C|
|OperatingHumidity||5 to 95% RH(Non-Condensing)|
|OperatingAltitude||0 to 2,000 Meters(6,560 ft)|
|Shock Test|Operating|IEC 60068-2-27, Half Sine Wave: 4G for a duration of 22ms, 3<br>shocks for each 3 directions, 9 times in total|
|Vibration|Operating|IEC 60068-2-6, Sine Wave: 10-500Hz @ 19.6m/S² (2G peak);<br>10 min per cycle, 60 min for all X, Y, Z directions|
|Over Voltage Category||II|
|Pollution Degree||2|



## Protections 

|Protections||
|---|---|
|Overvoltage|< 34.8V, SELV Output, Latch Mode|
|Overload / Overcurrent|> 120% of rated load current, Hiccup Mode,<br>Non-Latching (Auto-Recovery)|
|Over Temperature|> 75°C Surrounding Air Temperature @ 100% load,<br>Latch Mode|
|Short Circuit|Hiccup Mode, Non-Latching<br>(Auto-Recovery when the fault is removed)|
|Internal Fuse at L pin|T1AH|
|Degree of Protection|IP20|
|Protection Against Shock|Class II(No PE* connection is required)|



*PE: Primary Earth 

## Reliability Data 

|Reliability Data||
|---|---|
|MTBF|> 500,000 hrs. as per Telcordia SR-332<br>I/P: 100Vac, O/P: 100% load, Ta: 35°C|
|Expected CapLife Time|10years(115Vac & 230Vac, 50% load@40°C)|



All parameters are specified at 25°C ambient and AC input unless otherwise indicated. **www.DeltaPSU.com (December 2018, Rev. 03)** 

3 

**TECHNICAL DATASHEET** 

## **Chrome DIN Rail Power Supply** 24V 10W 1 Phase (Class II & NEC Class 2) / DRC-24V10W1A □ 

## Safety Standards / Directives 

|SafetyEntryLow Voltage|SafetyEntryLow Voltage||SELV(EN 60950)|
|---|---|---|---|
|Electrical Safety||TUV Bauart|EN 60950-1|
|||UL/cUL recognized|UL 60950-1 and CSA C22.2 No. 60950-1(File No. E131881)|
|||CB scheme|IEC 60950-1,|
||||Limited Power Source (LPS)|
|Industrial Control Equipment||UL/cUL listed|UL 508 and CSA C22.2 No. 107.1-01(File No. E338991)|
|Class 2 Power Supply|Class 2 Power Supply|UL/cUL recognized|UL 60950-1 and CSA C22.2 No. 60950-1 (File No. E131881)|
|CE|||In conformance with EMC Directive 2014/30/EU and Low|
||||Voltage Directive 2014/35/EU|
|Material and Parts|||RoHS Directive 2011/65/EU Compliant|
|Galvanic Isolation||Input to Output|3.0KVac|
|EMC||||
|Emissions(CE & RE)|||CISPR 32, EN 55032, FCC Title 47: Class B|
|Immunity|||EN 55024|
||Electrostatic Discharge|IEC 61000-4-2|Level 3 Criteria A1)|
||||Air Discharge: 8kV|
||||Contact Discharge: 4kV|
||Radiated Field|IEC 61000-4-3|Level 2 Criteria A1)|
||||80MHz-1GHz, 3V/M with 1kHz tone / 80% modulation|
||Electrical Fast Transient / Burst|IEC 61000-4-4|Level 3 Criteria A1)|
||||1kV|
||Surge|IEC 61000-4-5|Level 3 Criteria A1)|
||||Common Mode2): 2kV|
||||Differential Mode3): 1kV|
||Conducted|IEC 61000-4-6|Level 2 Criteria A1)|
||||150kHz-80MHz, 3Vrms|
||Power Frequency Magnetic Fields|IEC 61000-4-8|Criteria A1)|
||||1A/Meter|
||Voltage Dips and Interruptions|IEC 61000-4-11|> 95% dip; 0.5 cycle(10ms)|
|Voltage Fluctuation and Flicker|||IEC/EN 61000-3-3|



- 1) Criteria A: Normal performance within the specification limits 

- 2) Asymmetrical: Common mode (Line to earth) 

- 3) Symmetrical: Differential mode (Line to line) 

All parameters are specified at 25°C ambient and AC input unless otherwise indicated. **www.DeltaPSU.com (December 2018, Rev. 03)** 

4 

**TECHNICAL DATASHEET** 

## **Chrome DIN Rail Power Supply** 

24V 10W 1 Phase (Class II & NEC Class 2) / DRC-24V10W1A □ 

## **Block Diagram** 

**Device Description** 

- 1) Input terminal block connector 2) Output terminal block connector 3) DC OK control LED (Green) 4) Universal mounting system 

All parameters are specified at 25°C ambient and AC input unless otherwise indicated. **www.DeltaPSU.com (December 2018, Rev. 03)** 

5 

**TECHNICAL DATASHEET** 

## **Chrome DIN Rail Power Supply** 

24V 10W 1 Phase (Class II & NEC Class 2) / DRC-24V10W1A □ 

## **Dimensions** 

**L x W x D:** 91 x 18 x 55.6 mm (3.58 x 0.71 x 2.19 inch) 

## **Engineering Data** 

Output Load De-rating VS Surrounding Air Temperature 

## **Note** 

1. Power supply components may degrade, or be damaged, when the power supply is continuously used outside the shaded region, refer to the graph shown in Fig. 1. 

2. If the output capacity is not reduced when the surrounding air temperature exceeds its specification as defined on Page 3 under “Environment”, the device may run into Over Temperature Protection. When activated, the output voltage will go into latch mode and recover when AC power recycles. 

3. In order for the device to function in the manner intended, it is also necessary to keep a safety distance as recommended in the safety instructions while the device is in operation. 

4. Depending on the surrounding air temperature and output load delivered by the power supply, the device can be very hot! 

## **Fig. 1 De-rating for Vertical Mounting Orientation** 

> 55°C de-rate power by 2.5% / °C 

5. If the device has to be mounted in any other orientation, please contact **info@deltapsu.com** for more details. 

All parameters are specified at 25°C ambient and AC input unless otherwise indicated. **www.DeltaPSU.com (December 2018, Rev. 03)** 

6 

**TECHNICAL DATASHEET** 

## **Chrome DIN Rail Power Supply** 

## 24V 10W 1 Phase (Class II & NEC Class 2) / DRC-24V10W1A □ 

## Output Load De-rating VS Input Voltage 

- No output power de-rating across the entire Input voltage range 

## **Assembly & Installation** 

The power supply unit (PSU) can be mounted on 35mm DIN rails in accordance with EN60715. The device should be installed with input terminal block at the bottom. 

Each device is delivered ready to install. 

## Mounting 

## Dismounting 

## **Fig. 2.1  Mounting** 

Snap on the DIN rail as shown in Fig. 2.1: 

1. Tilt the unit upwards and insert it onto the DIN rail. 

2. Push downwards until stopped. 

3. Press against the bottom front side for locking. 

**Fig. 2.2  Dismounting** 

To uninstall, pull or slide down the latch with screw driver as shown in Fig. 2.2. Then slide the power supply unit (PSU) in the opposite direction, release the latch and pull out the power supply unit (PSU) from the rail. 

4. Shake the unit slightly to ensure that it is secured. 

All parameters are specified at 25°C ambient and AC input unless otherwise indicated. **www.DeltaPSU.com (December 2018, Rev. 03)** 

7 

**TECHNICAL DATASHEET** 

## **Chrome DIN Rail Power Supply** 24V 10W 1 Phase (Class II & NEC Class 2) / DRC-24V10W1A □ 

## Safety Instructions 

- ALWAYS switch mains of input power OFF before connecting and disconnecting the input voltage to the unit. If mains are not turned OFF, there is risk of explosion / severe damage. 

- **To guarantee sufficient convection cooling, keep a distance of 50mm (1.96 inch) above and below the device as well as a lateral distance of 25mm (0.98 inch) to other units.** 

- Note that the enclosure of the device can become very hot depending on the surrounding air temperature and load of the power supply. Risk of burns! 

- DO NOT insert any objects into the unit. 

- Hazardous voltages may be present for up to 5 minutes after the input mains voltage is disconnected. Do not touch the unit during this time. 

- The power supplies unit should be installed in minimum IP54 rated enclosure. 

- The power supplies are built in units and must be installed in a cabinet or room (condensation free environment and indoor location) that is relatively free of conductive contaminants. 

## **Functions** 

- **Graph illustrating the Start-up Time, Rise Time, and Hold-up Time** 

## Start-up Time 

The time required for the output voltage to reach 90% of its final steady state set value, after the input voltage is applied 

## Rise Time 

The time required for the output voltage to change from 10% to 90% of its final steady state set value. 

## Hold-up Time 

Time between the collapse of the AC input voltage, and the output falling to 95% of its steady state set value. 

All parameters are specified at 25°C ambient and AC input unless otherwise indicated. **www.DeltaPSU.com (December 2018, Rev. 03)** 

8 

**TECHNICAL DATASHEET** 

## **Chrome DIN Rail Power Supply** 24V 10W 1 Phase (Class II & NEC Class 2) / DRC-24V10W1A □ 

## Inrush Current 

Inrush current is the peak, instantaneous, input current measured and, occurs when the input voltage is first applied. For AC input voltages, the maximum peak value of inrush current will occur during the first half cycle of the applied AC voltage. This peak value decreases exponentially during subsequent cycles of AC voltage. 

## Overload & Overcurrent Protections (Auto-Recovery) 

The power supply’s Overload (OLP) and Over current (OCP) Protections will be activated when output current exceeds its specification as defined on Page 3 under “Protections”. In such occurrence, once the power supply has reached its maximum power limit, the protection is activated and the power supply will go into “Hiccup mode” (Auto-Recovery). The power supply will recover once the fault condition of the OLP and OCP is removed and IO is back within the specifications. 

## Over Temperature Protection (Latch Mode) 

## Dynamic Response 

The power supply output voltage will remains within ±5% of its steady state value, when subjected to a dynamic load from 10% to 100% of its rated current. 

##  **50% duty cycle / 5Hz to 100Hz** 

As described in load de-rating section, the power supply also has Over Temperature Protection (OTP). In the event of a higher operating temperature at 100% load; or, when the operating temperature is beyond what is recommended in the de-rating graph, the OTP circuit will be activated. When activated, power supply will latch, until the surrounding air temperature drops to its normal operating temperature or the load is reduced as recommended in the de-rating graph. Removal/re-application of input AC voltage will then be required in order to restart. 

## Short Circuit Protection (Auto-Recovery) 

The power supply’s output OLP/OCP function also provides protection against short circuits. When a short circuit is applied, the output current will operate in “Hiccup mode”, as shown in the illustration in the OLP/OCP section on this page. The power supply will return to normal operation after the short circuit is removed. 

## External Input Protection Device 

## Overvoltage Protection (Latch Mode) 

The power supply’s overvoltage circuit will be activated when its internal feedback circuit fails. The output voltage shall not exceed its specifications defined on Page 3 under “Protections”. Power supply will latch, and require removal/re-application of input AC voltage in order to restart. 

The unit is protected with internal fuse (not replaceable) at L pin and it has been tested and approved on 20A (UL) and 16A (IEC) branch circuits without additional protection device. An external protection device is only required if the supplying branch has an ampacity greater than above. Thus, if an external protective device is necessary, or, utilized, a minimum value of 8A B- or 4A C- characteristic breaker should be used. 

All parameters are specified at 25°C ambient and AC input unless otherwise indicated. **www.DeltaPSU.com (December 2018, Rev. 03)** 

9 

**TECHNICAL DATASHEET** 

## **Chrome DIN Rail Power Supply** 24V 10W 1 Phase (Class II & NEC Class 2) / DRC-24V10W1A □ 

## Operating Mode 

##  **Redundant Operation** 

In order to ensure proper redundancy operation for the power supply unit (PSU), ensure that the output voltage difference between the two units is kept at 0.45~0.50V for 24V supplies. Follow simple steps given below to verify: 

## **Step 1.** 

Measure output voltage of PSU 1 and PSU 2. If PSU 1 is the master unit, then VO of PSU 1 must be higher than PSU 2. In order to set the output voltage, connect the power supply to 50%% of rated load at any line voltage from 90-264Vac, and set the PSU 1 and PSU 2 output voltage. 

## **Step 2.** 

Connect the power supply units PSU 1 and PSU 2 to Vin 1 & Vin 2, respectively, of the DRR-20N (or 20A) module shown on the right of above diagram. 

## **Step 3.** 

Connect the system load from Vout. Please note that output voltage Vout from DRR module will be = VO (output voltage of power supply) – Vdrop* (in DRR module). 

**The Signal GND in the DRR module is for the built-in LED and DC OK signals. The Output GND terminals from the two PSU’s do not need to be connected to the Signal GND terminal. 

## **Fig. 3 Redundant Operation Connection Diagram** 

*Vdrop will vary from 0.60V to 0.90V (Typical 0.65V) depending on the load current and surrounding air temperature. 

##  **Parallel Operation** 

The power supply units (PSUs) can also be used for parallel operation in order to increase the output power. The difference in output voltage between the two units must be kept to within 25mV of each other. This difference must be verified with the same output load connected independently to each unit. 

Parameters such as EMI, inrush current, leakage current, PARD, start up time will be different from those on the datasheet, when two units are connected in parallel. The user will need to verify that any differences will still allow the two power supplies connected in parallel will work properly in their product/application. 

**Fig. 4 Parallel Operation Connection Diagram** 

All parameters are specified at 25°C ambient and AC input unless otherwise indicated. **www.DeltaPSU.com (December 2018, Rev. 03)** 

10 

**TECHNICAL DATASHEET** 

## **Chrome DIN Rail Power Supply** 

## 24V 10W 1 Phase (Class II & NEC Class 2) / DRC-24V10W1A □ 

## **Others** 

## Delta RoHS Compliant 

## **Restriction of the usage of hazardous substances** 

The European directive 2011/65/EU limits the maximum impurity level of homogeneous materials such as lead, mercury, cadmium, chrome, polybrominated flame retardants PBB and PBDE for the use in electrical and electronic equipment. RoHS is the abbreviation for “Restriction of the use of certain hazardous substances in electrical and electronic equipment”. 

This product conforms to this standard. 

## Attention 

Delta provides all information in the datasheets on an “AS IS” basis and does not offer any kind of warranty through the information for using the product. In the event of any discrepancy between the information in the catalog and datasheets, the datasheets shall prevail (please refer to www.DeltaPSU.com for the latest datasheets information). Delta shall have no liability of indemnification for any claim or action arising from any error for the provided information in the datasheets. Customer shall take its responsibility for evaluation of using the product before placing an order with Delta. 

Delta reserves the right to make changes to the information described in the datasheets without notice. 

All parameters are specified at 25°C ambient and AC input unless otherwise indicated. **www.DeltaPSU.com (December 2018, Rev. 03)** 

11