SYNC DRS-24V50W1NZ Instruction Manual

TECHNICAL DATASHEET
Sync DIN Rail Power Supply
24V 50W 1 Phase (NEC Class 2) / DRS-24V50W1N
□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (December 2018, Rev. 03)
1
Highlights & Features
•Ultra-compact size and galvanic isolation up to 3.0KVac
between input to output and input to ground
•Universal AC input voltage and full power from -10°C to
+55°C operation
•Up to 90.0% efficiency
•Low earth leakage current < 0.5mA @ 264Vac
•Built-in DC OK relay contact option available
•Extreme low temperature cold start at -40°C
•NEC Class 2 / Limited Power Source (LPS) certified
•Certified according to IEC/EN/UL 62368-1
Safety Standards
CB Certified for worldwide use
Model Number: DRS-24V50W1N☐
Unit Weight: 0.18 kg (0.40 lb)
Dimensions (L x W x D): 75 x 30 x 89.5 mm
(2.95 x 1.18 x 3.52 inch)
General Description
The ultra-compact and competitively priced Delta Sync DIN Rail DRS-24V50W1N☐power supply is designed for industrial applications
requiring highly reliable power supply that must fit in a small space. The Sync series operates with universal AC input range and offers
full power up to 55°C. The output is adjustable from 24-28 volts, and can support up to 3000 microfarads of load capacitance. A green
LED indicates output is present. The design is certified according to IEC/EN/UL 60950-1, IEC/EN/UL 62368-1 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
Sync DIN Rail Power Supply
Model
Number Input Voltage Range Rated Output V oltage Rated Output Curr ent
DRS-24V50W1N☐ 85-264Vac (120-375Vdc) 24Vdc 2.1A
Model Numbering
DR
S –
24V
50W
1
N
□
DIN Rail Product Series
S – Sync Series
Output Voltage 50W series Single Phase NEC Class 2 Z – Without DC OK Relay
Contact
R – With DC OK Relay
Contact
*This picture is for reference to DRS-24V50W series only.

TECHNICAL DATASHEET
Sync DIN Rail Power Supply
24V 50W 1 Phase (NEC Class 2) / DRS-24V50W1N
□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (December 2018, Rev. 03)
2
Specifications
Input Ratings / Characteristics
Nominal Input Voltage 100-240Vac
Input Voltage Range 85-264Vac
Nominal Input Frequency 50-60Hz
Input Frequency Range 47-63Hz
DC Input Voltage Range* 120-375Vdc
Input Current < 0.95A @ 115Vac, < 0.55A @ 230Vac
Efficiency at 100% Load > 89% @ 115Vac, > 90% @ 230Vac
Max Power Dissipation 0% load
100% load
< 0.3W @ 115Vac , < 0.5W @ 230Vac
< 6W @ 115Vac & 230Vac
Max Inrush Current (Cold Start) < 30A @ 115Vac, < 50A @ 230Vac
Leakage Current IEC/EN 60950-1 < 0.5mA @ 264Vac
(Neutral to PE terminal) IEC/EN 62368-1 < 1.0mA @ 264Vac
*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 24-28Vdc
Output Current 2.1A (50W max.)
Output Power 50W
Line Regulation < 0.5% (@ 85-264Vac, 100% load)
Load Regulation < 1.0% (@ 85-264Vac, 0-100% load)
PARD*** (20MHz) < 70mVpp @ > 0°C to 70°C
< 100mVpp @ 0°C to -20°C
Rise Time < 30ms @ nominal input (100% load)
Start-up Time < 2,000ms @ 115Vac (100% load)
< 1,000ms @ 230Vac (100% load)
Hold-up Time > 20ms @ 115Vac (100% load)
> 100ms @ 230Vac (100% load)
Dynamic Response (Overshoot & Undershoot O/P Voltage) ± 5% @ 85-264Vac input, 0-100% load
(Slew Rate: 0.1A/μs, 50% duty cycle @ 5Hz to 1KHz)
Start-up with Capacitive Loads 3,000µF Max
Functional DC OK Relay Contact
(for DRS-24V50W1NR)
30V / 1A, resistive load
The relay contact are normally “ON” (closed) when the output
(Vout) is greater than 75% of its rated value and “OFF”
(opened) when the output (Vout) is less than 75% typ.
**For power de-rating from < -10°C to -20°C, and 55°C to 70°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.

TECHNICAL DATASHEET
Sync DIN Rail Power Supply
24V 50W 1 Phase (NEC Class 2) / DRS-24V50W1N
□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (December 2018, Rev. 03)
3
Mechanical
Case Cover / Chassis
Plastic
Dimensions (L x W x D) 75 x 30 x 89.5 mm (2.95 x 1.18 x 3.52 inch)
Unit Weight 0.18 kg (0.40 lb)
Indicator Green LED (DC OK)
Cooling System Convection
Terminal Input 3 Pins (Rated 300V/16A)
Output 4 Pins (Rated 300V/16A)
Wire
Input / Output
AWG 22-12 / AWG 20-12
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 -20°C to +70°C (Cold start at -40°C @ 40% load)
Storage -40°C to +85°C
Power De-rating -10°C to -20°C de-rate power by 2% / °C
> 55°C de-rate power by 3.33% / °C
Operating Humidity 5 to 95% RH (Non-Condensing)
Operating Altitude 0 to 2,000 Meters (6,560 ft.)
Shock Test Non-Operating IEC60068-2-27, Half Sine Wave: 50G for a duration of 11ms;
3 times per direction, 9 times in total
Operating IEC 60068-2-27, Half Sine Wave: 10G for a duration of 11ms;
1 time in X axis
Vibration Non-Operating IEC 60068-2-6, Random: 5-500Hz; 2.09Grms, 20 min per axis
for all X, Y, Z directions
Operating IEC 60068-2-6, Sine Wave: 10-500Hz; 2G peak;
displacement
of 0.35mm; 1 octave per min; 60 min per axis for all X, Y, Z
directions
Pollution Degree 2
Protections
Overvoltage < 34.8V, SELV Output, Latch Mode
Overload / Overcurrent 105~120% of rated load current,
Foldback Mode (continuous current, voltage drops),
Auto-recovery when the fault is removed
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 T3.15A
Degree of Protection IP20
Protection Against Shock Class I with PE* connection
*PE: Primary Earth

TECHNICAL DATASHEET
Sync DIN Rail Power Supply
24V 50W 1 Phase (NEC Class 2) / DRS-24V50W1N
□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (December 2018, Rev. 03)
4
Reliability Data
MTBF Telcordia SR-332 > 700,000 hrs I/P: 115Vac & 230Vac,
O/P: 100% load, Ta: 25°C
MIL-HDBK-217F 231,000 hrs I/P: 115Vac & 230Vac,
O/P: 100% load, Ta: 25°C
Expected Cap Life Time 10 years (115ac & 230Vac, 50% load @ 40°C)
Safety Standards / Directives
Safety Entry Low Voltage SELV (EN 60950)
Electrical Safety TUV Bauart
UL/cUL recognized
CB Scheme
EN 60950-1, EN 62368-1
UL 60950-1, UL 62368-1, CSA C22.2 No. 60950-1
(File No. E191395)
IEC 60950-1, IEC 62368-1, Limited Power Source (LPS)
Industrial Control Equipment UL/cUL listed UL 508 and CSA C22.2 No. 107.1-01 (File No. E315335)
Class 2 Power Supply UL/cUL recognized UL 60950-1, UL 62368-1, CSA C22.2 No. 60950-1
(File No. E191395)
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
Input to Ground 3.0KVac
Output to Ground 0.5KVac

TECHNICAL DATASHEET
Sync DIN Rail Power Supply
24V 50W 1 Phase (NEC Class 2) / DRS-24V50W1N
□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (December 2018, Rev. 03)
5
EMC
Emissions (CE & RE) Generic Standards: EN 61000-6-3, EN 61000-6-4
CISPR 32, EN 55032 EN 55011, FCC Title 47: Class B
Component Power Supply for General Use EN 61204-3
Immunity Generic Standards: EN 55024, EN 61000-6-1, EN 61000-6-2
Electrostatic Discharge IEC 61000-4-2 Level 3 Criteria A1)
Air Discharge: 8kV
Contact Discharge: 6kV
Radiated Field IEC 61000-4-3 Level 3 Criteria A1)
80MHz-1GHz, 10V/M with 1kHz tone / 80% modulation
1.4GHz-2GHz, 3V/M with 1kHz tone / 80% modulation
2GHz-2.7GHz, 1V/M with 1kHz tone / 80% modulation
Electrical Fast Transient / Burst IEC 61000-4-4 Level 3 Criteria A1)
2kV
Surge IEC 61000-4-5 Level 3 Criteria A1)
Common Mode3): 2kV
Differential Mode4): 1kV
Conducted IEC 61000-4-6 Level 3 Criteria A1)
150kHz-80MHz, 10Vrms
Power Frequency Magnetic Fields IEC 61000-4-8 Criteria A1)
30A/Meter
Voltage Dips and Interruptions IEC 61000-4-11 0% of 100Vac, 20ms
0% of 100Vac, 5000ms
40% of 100Vac, 200ms
70% of 100Vac, 10ms
70% of 100Vac, 500ms
0% of 240Vac, 20ms
0% of 240Vac, 5000ms
40% of 240Vac, 200ms
70% of 240Vac, 500ms
Criteria A1)
Criteria B2)
Criteria B2)
Criteria A1)
Criteria B2)
Criteria A1)
Criteria B2)
Criteria A1)
Criteria A1)
Low Energy Pulse Test (Ring Wave) IEC 61000-4-12 Level 3 Criteria A1)
Common Mode3): 2kV
Differential Mode4): 1kV
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) Criteria B: Temporary degradation or loss of function which is self-recoverable
3) Asymmetrical: Common mode (Line to earth)
4) Symmetrical: Differential mode (Line to line)

TECHNICAL DATASHEET
Sync DIN Rail Power Supply
24V 50W 1 Phase (NEC Class 2) / DRS-24V50W1N
□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (December 2018, Rev. 03)
6
Block Diagram
DRS-24V50W1NZ
DRS-24V50W1NR

TECHNICAL DATASHEET
Sync DIN Rail Power Supply
24V 50W 1 Phase (NEC Class 2) / DRS-24V50W1N
□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (December 2018, Rev. 03)
7
Device Description
DRS-24V50W1NZ
1) Input terminal block connector
2) Output terminal block connector
3) DC voltage adjustment potentiometer
4) DC OK LED (Green)
5) Universal mounting system
DRS-24V50W1NR
1) Input terminal block connector
2) Output terminal block connector
3) DC OK relay contact
4) DC voltage adjustment potentiometer
5) DC OK LED (Green)
6) Universal mounting system

TECHNICAL DATASHEET
Sync DIN Rail Power Supply
24V 50W 1 Phase (NEC Class 2) / DRS-24V50W1N
□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (December 2018, Rev. 03)
8
Dimensions
DRS-24V50W1NZ
L x W x D: 75 x 30 x 89.5 mm [2.95 x 1.18 x 3.52 inch]
DRS-24V50W1NR
L x W x D: 75 x 30 x 89.5 mm [2.95 x 1.18 x 3.52 inch]

TECHNICAL DATASHEET
Sync DIN Rail Power Supply
24V 50W 1 Phase (NEC Class 2) / DRS-24V50W1N
□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (December 2018, Rev. 03)
9
Engineering Data
Output Load De-rating VS Surrounding Air Temperature
Output Load De-rating VS Input Voltage
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 >55
°C, the
device will
run into Over Temperature
Protection. When activated, power supply will
latch off, until the surrounding air temperature
is lowered or the load is reduced as far as
necessary to keep the device in working
condition, and require removal/re-application
of input AC voltage in order to restart.
3. In order for the device to function in the
manner intended, it is also necessary to keep
a safety distance of 80mm (3.14 inch) above
and below the device as well as a lateral
distance of 25mm (0.98 inch) to other units
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!
5. If the device has to be mounted in any other
orientation, please contact
[email protected]om for more details.
Fig. 1 De-rating for Vertical Mounting Orientation
-10°C to -20°C de-rate power by 2% / °C
> 55°C de-rate power by 3.33% / °C
No output power de-rating across the entire
input voltage range

TECHNICAL DATASHEET
Sync DIN Rail Power Supply
24V 50W 1 Phase (NEC Class 2) / DRS-24V50W1N
□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (December 2018, Rev. 03)
10
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
Safety Instructions
Dismounting
Fig. 2.1 Mounting
Snap on the DIN rail as shown in Fig. 2.1:
1. Tilt the unit slightly upwards and put it onto the DIN rail.
2. Push downwards until stopped.
3. Press against the bottom front side for locking.
4. Shake the unit slightly to ensure that it is secured.
•ALWAYS switch mains of input power OFF before connecting and
disconnecting the input voltage to the device. If mains are not turned
OFF, there is risk of explosion / severe damage.
•To guarantee sufficient convection cooling, keep a distance of
> 40mm (1.57 inch) above and > 20mm (0.79 inch) below the
device as well as a lateral distance of > 15mm (0.59 inch) to other
units. In case the adjacent device is a heat source, the lateral
distance will be > 25mm (0.98 inch).
•Note that the enclosure of the device can become very hot depending
on the surrounding air temperature and output load connected to the
device. Risk of burns!
•The main power must be turned off before connecting or disconnecting
the wires to the terminals!
•DO NOT insert any objects into the device.
•Dangerous voltages present for at least 5 minutes after disconnecting
all sources of power.
•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.
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.

TECHNICAL DATASHEET
Sync DIN Rail Power Supply
24V 50W 1 Phase (NEC Class 2) / DRS-24V50W1N
□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (December 2018, Rev. 03)
11
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.
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.
Dynamic Response
The power supply output voltage will remains within ±5% of its
steady state value, when subjected to a dynamic load from 0% to
100% of its rated current.
50% duty cycle / 5Hz to 1KHz

TECHNICAL DATASHEET
Sync DIN Rail Power Supply
24V 50W 1 Phase (NEC Class 2) / DRS-24V50W1N
□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (December 2018, Rev. 03)
12
Overload & Overcurrent Protections (Auto-Recovery)
The power supply’s Overload (OLP) and Overcurrent (OCP)
Protections will be activated when output current is about 2.4A
typ. When this occurs, the VOwill start to droop (refer to Ⓐ
below). Once the output voltage is below about 14Vdc typ., the
power supply will start to operate in “Hiccup mode” (Auto-
Recovery mode). The power supply will recover once the fault
condition of the OCP is removed and output current is back within
the specifications.
Short Circuit Protection (Auto-Recovery)
The power supply’s output Short Circuit Protection function also
provides protection against short circuits. When a short circuit is
applied, the output current will operate in “Hiccup mode”. The
power supply will return to normal operation after the short circuit
is removed.
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 off, and require removal/re-application of input
AC voltage in order to restart.
The power supply should be latch.
Over Temperature Protection (Latch Mode)
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 off, 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.
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 20A B- or
13A C- characteristic breaker should be used.

TECHNICAL DATASHEET
Sync DIN Rail Power Supply
24V 50W 1 Phase (NEC Class 2) / DRS-24V50W1N
□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (December 2018, Rev. 03)
13
Operating Mode
Redundant Operation
Parallel Operation
**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
In order to ensure proper redundant operation for the
power supply units (PSUs), the output voltage difference
between the two units must be kept at 0.45~0.50V for
these 24V supplies. Follow simple steps given below to
set them up for the redundant operation:
Step 1.
Measure output voltage of PSU 1 and PSU 2. If PSU 1 is
the master unit, then VOof PSU 1 must be higher than
PSU 2. In order to set the output voltage, individually
connect each power supply to 50% of rated load at any
line voltage from 85-264Vac, 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 to Vout. Please note that output
voltage Vout from DRR module will be = VO(output voltage
of power supply) – Vdrop* (in DRR module).
*Vdrop will vary from 0.60V to 0.90V (Typical 0.65V) depending on the
load current and surrounding air temperature.
Fig. 4 Parallel Operation Connection Diagram
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.

TECHNICAL DATASHEET
Sync DIN Rail Power Supply
24V 50W 1 Phase (NEC Class 2) / DRS-24V50W1N
□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (December 2018, Rev. 03)
14
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.