Emerson Static Transfer Switch User Manual

The optional Programmable Relay Board (PRB) has eight channels to report events to an external 

device. Up to ten (10) events can be programmed to each channel. See 6.1 - Programmable Relay 

Board for more information on the PRB.
If your Liebert STS2 has the PRB option installed, list the settings below for future reference. If con-

trol power is lost in the Liebert STS2, the settings are not saved.