TECHNICAL DATASHEET
CliQ II DIN Rail Power Supply
24V 480W 1 Phase / DRP024V480W1B
□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2020, Rev. 07)
14
Operating Mode
Redundant Operation
In order to ensure proper redundant operation for the power
supply unit (PSU), the output voltage difference between the
two units must be kept at 0.45~0.50V for 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 V
O
of PSU 1 must be higher than PSU 2. In
order to set the output voltage, individually connect the 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 diagram on the right.
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).
*V
drop
will vary from 0.60V to 0.90V (Typical 0.65V) depending on the load
current and surrounding air temperature.
**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. 4 Redundant Operation Connection Diagram
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. 5 Parallel Operation Connection Diagram
