PIRD20.241 Datasheet, PDF (13/15 Pages) PULS GmbH – DC 12-28V, 20A, DUAL INPUT REDUNDANCY MODULE

PIANO-Series
PIRD20.241
DC 12-28V, 20A, DUAL INPUT REDUNDANCY MODULE
17. APPLICATION NOTES
17.1. USING ONLY ONE INPUT INSTEAD OF BOTH CHANNELS
Using only one input instead of both is allowed up to a nominal input current of 20A at max. +55°C ambient
temperature.
However, it is always recommended to connect both input path in parallel for reduced power losses and voltage drop.
In cases when this is not possible, the following values can be expected:
Voltage drop, input to output typ.
typ.
Power losses
typ.
typ.
585mV
645mV
0W
5.85W
12.9W
at 1x10A, 25°C, see Fig. 17-1
at 1x20A, 25°C, see Fig. 17-1
at 0A, 25°C
at 10A, 25°C
at 20A, 25°C
Fig. 17-1 Input to output voltage drop
when only one input is used
Voltage Drop, typ.
700mV
A
600mV
B
500mV
400mV
300mV
200mV
0
A... 25°C
B... 60°C
Input, Output Current
5A 10A 15A 20A
Fig. 17-2 Test setup for voltage drop measurements
PIC480.241
24V, 20A
+
-
I1
A
V _U1
PIRD20.241
Input 1
Output
Output
IOUT
A
UOUT ^V
Variable
Load,
0-20A
Input 2
must not
used
Input 2
Voltage Drop = U1 - UOUT
17.2. RECOMMENDATIONS FOR REDUNDANCY
Recommendations for the configuration of redundant power systems:
- Use three-phase power supplies to gain functional safety if one phase fails.
- When single-phase power supplies are utilized connect them to different phases or mains circuits if possible.
- Use separate input fuses for each power supply.
- Set the power supply in “Parallel-Use” mode if this feature is available
- It is desirable to set the output voltages of all power supplies to the same value.
Sep. 2016 / Rev. 1.0 DS-PIRD20.241
All parameters are specified at 24V, 20A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
www.pulspower.com Phone [phone] Germany
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