COMMUNICATION
EATON
BladeUPS
®
(12 kVA) User's Guide
S
164201649 Rev 4
www.eaton.com/powerquality
88
If a UPS is shut down and removed from the parallel system, the other UPSs in the
system will not re-identify themselves to compensate for the missing UPS until logic
power to all the UPSs is cycled. For example, if you remove UNIT 2 and rewire
UNIT 3's CAN IN port to UNIT 1's CAN OUT port, UNIT 3 will not re-identify itself as
UNIT 2 until logic power is cycled. The CAN Bridge Cards for UNIT 1 and UNIT 3
continue to function normally without the need to re-identify.
Metering
The Output and Load Receptacle meter readings differ between a parallel system and
a standalone UPS. In a parallel system, one UPS reads the Load Receptacle value for
the total system (the others read zero), but each UPS displays its own Output value.
For example, in a two-unit parallel system with one Anderson load connection for
12 kVA, the Load Receptacle current would read 12 kVA on one UPS and zero on the
other UPS, but the Output measurement would be 6 kVA on each UPS (half the total).
In a standalone UPS, the load can be connected from the outlet cord or the Anderson
load connector. The Output measurement would be the total load on the UPS, and
the Load Receptacle reading would be the portion supplied by the Anderson load
connector.
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