Datasheet

TECHNICAL DATASHEET
CliQ DIN Rail Power Supply
12V 15W 1 Phase / DRP012V015W1A□
All parameters are specified at 25°C ambient unless otherwise noted.
www.DeltaPSU.com (September 2013, Rev. 03)
10
Over Temperature Protection
As mentioned above, the power supply also has Over Temperature
Protection (OTP). This is activated when the overload condition
persists for an extended duration and the output current is below
the overload trigger point but >100% load. In the event of a higher
operating condition at 100% load, the power supply will run into
OTP when the surrounding air temperature is >80°C. When
activated, the output voltage will go into bouncing mode until the
operating surrounding air temperature drops to 50°C or output
capacity is reduced as recommended in the derating graph.
Short Circuit Protection
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.
Operating Mode
 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 0.20~0.25V for 12V 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 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).
Fig. 2.1 Redundancy / Parallel Operation Connection Diagram
*V
drop
will vary from 0.40V to 0.60V (Typical 0.45V) depending on the load current
and surrounding air temperature.
 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 DRP012V015W1AZ
is not desig
ned for current sharing, a good current sharing between two power supplies can be achieved by following simple steps as
below (Refer to Fig. 2.1 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 0.40V to 0.60V (Typical 0.45V) depending on the load current and surrounding air temperature.