Emerson 30-200kVA Manuel D’Utilisation

RS232-1 provides serial data and is intended for direct use with Liebert MultiLink monitoring and 

server shutdown software.
RS232-2 provides serial data and is intended for use by authorized commissioning and service person-

nel.
These serial ports are shared with the optional Web browser, SNMP, ModBus and relay cards. Refer 

to Table 31 regarding compatibility of simultaneous use.

There are three interface slots available for optional Web browser, SNMP, ModBus and Relay cards 

as illustrated in 9.0 - Options—For Assembly Inside the UPS Cabinet.

EXT-Maint X3-1&2 on UPS Parallel Board M3 (leave open if no external bypass switch is used)
Provides external maintenance bypass interlock protection for the UPS. Short circuit means external 

bypass closed.
EXT-Out (X3-3&4) on UPS Parallel Board (leave shorted if no external output switch is used). Pro-

vides external output interlock protection for paralleled UPS modules. Short circuit means external 

output switch closed.

NOTE
UPS Parallel Board M3 is located behind protective covers accessible after opening the UPS 

NOTE
Jumper JP1 (located next to X3) needs to be removed for X3:3&4 to work properly.