Liebert UPS System - Manual (Page 80)

Chapter 6 Maintenance
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2. Monitoring single UPS
UPS support the communication modes through RS232, RS485, MODEM and
SNMP card. These communication modes can’t be used by one same UPS. The
single UPS monitoring theory is shown in Fig.6-1.
Fig. 6-1 Monitoring of Single UPS
3. Monitoring parallel operation system
The communication of parallel operation system is realized through its internal
RS485 bus. Any UPS module can be nominated as a master UPS. The user can
use any communication mode to get the information of any UPS module through
this master UPS. The monitoring method of parallel system is shown in Fig.6-2.
Fig. 6-2 Monitoring of Parallel UPS System