TECHNICAL DATASHEET
Chrome DIN Rail Power Supply
24V 30W 1 Phase (Class II & NEC Class 2) / DRC-24V30W1A□
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 > 87.0% @ 115Vac & 230Vac
Can be installed in compact cabinets
NEC Class 2 and Limited Power Source (LPS) approvals
Conforms to harmonic current IEC/EN 61000-3-2, Class A
Safety approval according to IEC/EN/UL 60950-1,
IEC/EN/UL 62368-1 and UL508
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Safety Standards
CB Certified for worldwide use
*This picture is for reference to DRC-24V30W series only.
Model Number:
DRC-24V30W1A☐
Unit Weight:
0.14 kg (0.31 lb)
Dimensions (L x W x D): 91 x 53 x 55.6 mm
(3.58 x 2.09 x 2.19 inch)
General Description
The DRC-24V30W1A☐ 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, IEC/EN/UL 62368-1 and UL 508. NEC Class 2 and Limited Power Source (LPS) approvals are available for this
product.
Model Information
Chrome DIN Rail Power Supply
Model Number
Input Voltage Range
Rated Output Voltage
Rated Output Current
DRC-24V30W1A☐
90-264Vac (125-375Vdc)
24Vdc
1.25A
Model Numbering
DR
C–
DIN Rail
Product Series
Output Voltage
C – Isolation Class II
Power Supply
1
24V
30W
1
A
□
Output Power
(30W series)
Single Phase
No PFC
Z – Black Plastic Case
G – Grey Plastic Case
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (April 2021, Rev. 05)
TECHNICAL DATASHEET
Chrome DIN Rail Power Supply
24V 30W 1 Phase (Class II & NEC Class 2) / DRC-24V30W1A□
Specifications
Input Ratings / Characteristics
Nominal Input Voltage
100-240Vac
Input Voltage Range
90-264Vac
Nominal Input Frequency
50-60Hz
Input Frequency Range
47-63Hz
Nominal DC Input Voltage*
125-375Vdc
Input Current
< 0.80A @ 115Vac, < 0.60A @ 230Vac
Efficiency at 100% Load
> 87.0% @ 115Vac & 230Vac
Max Power Dissipation
0% load
100% load
< 0.3W @ 115Vac & 230Vac
< 4.48W @ 115Vac & 230Vac
Max Inrush Current (Cold Start)
< 25A @ 115Vac, < 50A @ 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**
Nominal Output Voltage
24Vdc
Factory Set Point Tolerance
24Vdc ± 2%
Output Voltage Adjustment Range
23.52-24.48Vdc
Output Current
0-1.25A (30W max.)
Output Power
30W
Line Regulation
< 0.5% (@ 90-264Vac input, 100% load)
Load Regulation
< 1.0% (@ 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
> 25ms @ 115Vac,
> 60ms @ 230Vac (100% load)
Dynamic Response
(Overshoot & Undershoot O/P Voltage)
± 5% @ 90-264Vac input, 10-100% load
(Slew Rate: 0.1A/μs, 50% duty cycle @ 5Hz to 100Hz)
Start-up with 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.
2
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (April 2021, Rev. 05)
TECHNICAL DATASHEET
Chrome DIN Rail Power Supply
24V 30W 1 Phase (Class II & NEC Class 2) / DRC-24V30W1A□
Mechanical
Case Cover
Plastic
Dimensions (L x W x D)
91 x 53 x 55.6 mm (3.58 x 2.09 x 2.19 inch)
Unit Weight
0.14 kg (0.31 lb)
Indicator
Green LED
Cooling System
Terminal
Wire
DC OK
Convection
Input
2 Pins (Rated 300V/25A)
Output
4 Pins (Rated 300V/25A)
Input / Output
AWG 24-12
Mounting Rail
Standard TS35 DIN Rail in accordance with EN 60715
Noise (1 Meter from power supply)
Sound Pressure Level (SPL) < 25dBA
Environment
Surrounding Air Temperature
Operating
Storage
-25°C to +71°C
-25°C to +85°C
Power De-rating
> 55°C de-rate power by 2.5% / °C
Operating Humidity
5 to 95% RH (Non-Condensing)
Operating Altitude
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
shocks for each 3 directions, 9 times in total
Vibration
Operating
IEC 60068-2-6, Sine Wave: 10-500Hz @ 19.6m/S² (2G peak);
10 min per cycle, 60 min for all X, Y, Z directions
Over Voltage Category
II
Pollution Degree
2
Protections
Overvoltage
< 34.8V, SELV Output, Latch Mode
Overload / Overcurrent
> 130% of rated load current, Hiccup Mode,
Non-Latching (Auto-Recovery)
Over Temperature
> 75°C Surrounding Air Temperature @ 100% load,
Latch Mode
Short Circuit
Hiccup Mode, Non-Latching
(Auto-Recovery when the fault is removed)
Internal Fuse at L pin
T3.15AH
Degree of Protection
IP20
Protection Against Shock
Class II (No PE* connection is required)
*PE: Primary Earth
Reliability Data
MTBF
> 500,000 hrs. as per Telcordia SR-332
I/P: 100Vac, O/P: 100% load, Ta: 35°C
Expected Cap Life Time
10 years (115Vac & 230Vac, 50% load @ 40°C)
3
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (April 2021, Rev. 05)
TECHNICAL DATASHEET
Chrome DIN Rail Power Supply
24V 30W 1 Phase (Class II & NEC Class 2) / DRC-24V30W1A□
Safety Standards / Directives
Safety Entry Low Voltage
Electrical Safety
SELV (EN 60950)
TUV Bauart
UL/cUL recognized
Industrial Control Equipment
Class 2 Power Supply
EN 60950-1, EN 62368-1
UL 60950-1 and CSA C22.2 No. 60950-1 (File No. E131881)
UL 62368-1 and CSA C22.2 No. 62368-1 (File No. E131881)
CB scheme
IEC 60950-1, IEC 62368-1, Limited Power Source (LPS)
UL/cUL listed
UL 508 and CSA C22.2 No. 107.1-01 (File No. E338991)
UL/cUL recognized
UL 60950-1 and CSA C22.2 No. 60950-1 (File No. E131881)
UL 62368-1 and CSA C22.2 No. 62368-1 (File No. E131881)
CE
In conformance with EMC Directive 2014/30/EU and
Low Voltage Directive 2014/35/EU
UKCA
In conformance with 2016 No. 1101. The Electrical Equipment
(Safety) Regulations 2016 and 2016 No. 1091
The Electromagnetic Compatibility Regulations 2016
3.0KVac
Galvanic Isolation
Input to Output
EMC
Emissions (CE & RE)
Generic Standards: CISPR 32, EN 55032,
FCC Title 47: Class B
Immunity
Generic Standards: 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); Self Recoverable
Harmonic Current Emission
IEC/EN 61000-3-2, Class A
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)
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All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (April 2021, Rev. 05)
TECHNICAL DATASHEET
Chrome DIN Rail Power Supply
24V 30W 1 Phase (Class II & NEC Class 2) / DRC-24V30W1A□
Block Diagram
Device Description
1)
2)
3)
4)
5)
5
Input terminal block connector
Output terminal block connector
DC voltage adjustment potentiometer
DC OK control LED (Green)
Universal mounting system
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (April 2021, Rev. 05)
TECHNICAL DATASHEET
Chrome DIN Rail Power Supply
24V 30W 1 Phase (Class II & NEC Class 2) / DRC-24V30W1A□
Dimensions
L x W x D: 91 x 53 x 55.6 mm (3.58 x 2.09 x 2.19 inch)
Engineering Data
Output Load De-rating VS Surrounding Air Temperature
Note
1.
2.
3.
4.
Fig. 1
6
De-rating for Vertical Mounting Orientation
> 55°C de-rate power by 2.5% / °C
5.
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.
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.
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.
Depending on the surrounding air temperature
and output load delivered by the power
supply, the device can be very hot!
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 (April 2021, Rev. 05)
TECHNICAL DATASHEET
Chrome DIN Rail Power Supply
24V 30W 1 Phase (Class II & NEC Class 2) / DRC-24V30W1A□
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 35 mm 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
Fig. 2.2 Dismounting
Snap on the DIN rail as shown in Fig. 2.1:
1. Pull the unit’s DIN rail latch OUT.
2. Tilt the unit slightly upwards, hook the top end onto the DIN
rail and push downwards until stopped.
3. Position the bottom front end against the DIN rail.
4. Push the unit’s latch DIN rail IN to lock.
To uninstall, pull the unit’s DIN rail latch OUT as shown in Fig.
2.2. Tilt the bottom part of the unit out. Push the unit up and pull
out from the DIN rail.
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All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (April 2021, Rev. 05)
TECHNICAL DATASHEET
Chrome DIN Rail Power Supply
24V 30W 1 Phase (Class II & NEC Class 2) / DRC-24V30W1A□
Safety Instructions
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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 50 mm
(1.97 inch) above and below the device as well as a lateral distance of
25 mm (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 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.
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All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (April 2021, Rev. 05)
TECHNICAL DATASHEET
Chrome DIN Rail Power Supply
24V 30W 1 Phase (Class II & NEC Class 2) / DRC-24V30W1A□
Inrush Current
Dynamic Response
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.
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
External Input Protection Device
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 13A B- or 8A C- characteristic breaker
should be used.
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All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (April 2021, Rev. 05)
TECHNICAL DATASHEET
Chrome DIN Rail Power Supply
24V 30W 1 Phase (Class II & NEC Class 2) / DRC-24V30W1A□
Overload & Overcurrent Protections (Auto-Recovery)
Overvoltage Protection (Latch Mode)
The power supply’s Overload (OLP) and Over current (OCP)
Protections will be activated when output current (IO) 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.
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.
Over Temperature Protection (Latch Mode)
It is not recommended to prolong the duration of IO when it is less
than OLP/OCP point, but greater than 100%, since it may cause
damage to the PSU.
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.
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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.
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (April 2021, Rev. 05)
TECHNICAL DATASHEET
Chrome DIN Rail Power Supply
24V 30W 1 Phase (Class II & NEC Class 2) / DRC-24V30W1A□
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% load at any line voltage, 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
Fig. 4
Parallel 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.
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All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (April 2021, Rev. 05)
TECHNICAL DATASHEET
Chrome DIN Rail Power Supply
24V 30W 1 Phase (Class II & NEC Class 2) / DRC-24V30W1A□
Fig. 5
DC Input Operation Connection Diagram
DC Input Operation
Step 1.
Use a battery or similar DC source.
Step 2.
Connect +pole to L and -pole to N.
Step 3.
Connect the PE terminal to an earth wire or to the machine ground.
Fig. 6
2 of 3 Phase System Input Operation Connection Diagram
2 of 3 Phase System Input Operation
Delta's Chrome can use on 2 of 3 phase system. Please refer to the following step.
Step 1.
The input voltage applied from Line to Neutral is below the maximum rated input. The input voltage shall be below 240Vac +10%.
Step 2.
The external protector is needed on N (Neutral) input line to secure a safety. N line does not have internal fuse protection. An appropriate
fuse or circuit breaker should be connected in series with N input line connection like the following.
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All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (April 2021, Rev. 05)
TECHNICAL DATASHEET
Chrome DIN Rail Power Supply
24V 30W 1 Phase (Class II & NEC Class 2) / DRC-24V30W1A□
Others
PFC – Norm EN 61000-3-2
Line Current Harmonic content
Typically, the input current waveform is not sinusoidal due to the periodical peak charging of the input capacitor.
In industrial environment, complying with EN 61000-3-2 is only necessary under special conditions. Complying to
this standard can have some technical drawbacks, such as lower efficiency as well as some commercial aspects
such as higher purchasing costs. Frequently, the user does not profit from fulfilling this standard, therefore, it is
important to know whether it is mandatory to meet this standard for a specific application.
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.
Manufacturer and Authorized Representatives Information
Manufacturer
Thailand
Delta Electronics (Thailand) PCL.
909 Pattana 1 Rd., Muang, Samutprakarn, 10280 Thailand
Taiwan
Delta Electronics, Inc.
3 Tungyuan Road, Chungli Industrial Zone, Taoyuan County
32063, Taiwan
Authorized Representatives
The Netherlands
Delta Greentech (Netherlands) B.V.
Zandsteen 15, 2132 MZ Hoofddorp, The Netherlands
13
United Kingdom
Delta Electronics Europe Limited
1 Redwood Court, Peel Park Campus,
East Kilbride, Glasgow, G74 5PF, United Kingdom
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (April 2021, Rev. 05)