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6.4 UPS Communications
The Liebert PSI XR is equipped with a Liebert IntelliSlot port to provide advanced communication
and monitoring options.
Liebert MultiLink software continually monitors the UPS and can shut down your computer or server
via USB, contact closure and SNMP (via IS-WEBRT3 card) in the event of an extended power failure.
The Liebert IS-WEBRT3 provides SNMP and Web-based monitoring and control of the UPS across
the network.
6.5 UPS Inverter/Transfer Voltage Configurations
A two-pin DIP switch on the rear of the PSI XR permits setting the UPS to operate at nominal volt-
ages of 110V, 120V or 127V. This feature will change the high and low points at which the UPS
switches to battery power. It also changes the UPS’ output voltage when the UPS is operating in bat-
tery mode. The factory default setting is 120 VAC.
Turn Off the UPS before making any changes to the voltage configuration.
Figure 17 DIP switch settings for 120V system
NOTE
The USB, SNMP and contact closure communications can operate in parallel.
Table 5 Voltage configurations
Setting Input Voltage Range Output Voltage (Battery Mode)
110 83~138 110VAC
120 90~150 120VAC
127 96~159 127VAC
12
ON
FUNCTION 2 1
Voltage = 110V
Voltage = 120V
Voltage = 120V
Voltage = 127V