nextys DCW20 - Parallel Operation

DCW20 User Manual rev. 5
Page 13/34
3.2.1 Parallel operation
When configured as DC/DC converter
multiple DCW20 can be connected with
output in parallel for power increase or
redundancy.
In this mode of operation, the field
“DC/DC output mode” (§4.2.29) must be
set to “Parallel”.
In case of parallel for redundancy an
external ORing module (for example
OR50) is required.
For proper operation between the 2
units the cable length connecting the 2
DCW20 to the load must have the same
length and cross-section.
For optimal current sharing it may be
necessary to slightly adjust one of the 2
devices output voltage until the same
current is delivered by the 2 units.
It is recommended to limit the load
power to 80% of the sum of the
individual output power of the paralleled
units.
Parallel connection for power increase of multiple DCW20 units is not recommended in
UPS mode. Contact factory for details.
Figure 10: DC/DC parallel connection example with
External redundancy module
DCW20_040-02-700-005-EH-1117