DRP048V240W1BX Datasheet, PDF (14/15 Pages) Delta Electronics, Inc. – Worldwide AC input range without power de-rating

TECHNICAL DATASHEET
CliQ II DIN Rail Power Supply
48V 240W 1 Phase / DRP048V240W1B□
Operating Mode
Fig. 4 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 0.90~1.00V for 48V 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 V_O 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 V_in 1 & V_in 2
respectively.
Step 3.
Connect the system load from V_out. Please note that output voltage V_out from DRR module will be = V_O (output voltage of power
supply) – V_drop* (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 DRP048V240W1B□
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. 4 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 V_in 1 & V_in 2 to verify the voltage difference. Ensure
the voltages are within ±25mV.
Step 4.
Output voltage from DRR module V_out will be = V_O (output
voltage of power supply) – V_drop* (in DRR module).
*V_drop will vary from 0.60V to 0.90V (Typical 0.65V) depending on the load current and surrounding air temperature.
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All parameters are specified at 25°C ambient unless otherwise noted.
www.DeltaPSU.com (September 2013, Rev. 01)