DRP024V120W1AA_14 Datasheet, PDF (12/13 Pages) Delta Electronics, Inc. – CliQ DIN Rail Power Supply

TECHNICAL DATASHEET
CliQ DIN Rail Power Supply
24V 120W 1 Phase / DRP024V120W1AA
Operating Mode
Fig. 3 Redundancy / Parallel Operation Connection Diagram
 Redundancy 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 and set the PSU 1 and PSU 2 output voltage.
Step 2.
Connect the right DRR module, 20A as per the system requirement to the power supply units PSU 1 and PSU 2 at Vin 1 & Vin 2
respectively.
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).
 Parallel Operation
These DRR modules can also be used for Parallel function in order to increase the output power by N+1 (e.g. 2.5A + 2.5A = 5A or 2.5A
+ 2.5A + 2.5A = 7.5A) or current sharing, and thus increasing the power supply and system reliability. Though the DRP024V120W1AA
is not designed for current sharing, a good current sharing between two power supplies can be achieved by following simple steps as
below (Refer to Fig. 3 for the Connection Diagram).
Step 1.
Set output load condition for both supplies at 50% and measure
the output voltages.
Step 2.
Adjust output voltages to the same level or within ±25mV
difference.
Step 3.
Connect PSU 1 and PSU 2 with the DRR-20A module and
measure at Vin 1 & Vin 2 to verify the voltage difference. Ensure
the voltages are within ±25mV.
Step 4.
Output voltage from DRR module Vout 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.
12
All parameters are specified at 25°C ambient unless otherwise indicated.
www.DeltaPSU.com (May 2014, Rev. 03)