Liebert POWER PROTECTION STATIC TRANSFER SWITCH User Manual

An optional RS-422 port, contained in the Comms Board, can be installed in the static transfer switch 

to provide communications with Liebert’s SiteScan. SiteScan is Liebert’s system monitoring software 

that allows you to utilize a PC to monitor the static transfer switch’s status and check alarms. See 

6.5 - Comms Board for more information on this board. 
If the STS2 will be connected to SiteScan:

• Select YES for the SiteScan choice in the Comm Options dialog box to activate the card.

To save you communications configuration settings:
1. When you have completed the Comm Options configurations, ensure you have selected YES for all 

the settings that you want activated.

2. Select SAVE to keep the settings.
Whenever you make modifications to the any of the Comm Options, select SAVE to keep the changes.

Most System Options are configured at the factory. However, you may need to set two of the choices 

after the unit is installed: Wye Output Transformer and Remote Source Selection.

• Select SYSTEM OPTIONS from the System Settings Menu.

The System Options dialog box is displayed. 

• An option is enabled by selecting YES.
• An option is disabled by selecting NO.

This selection is set at the factory. The choice is set to YES to enable both output breakers (CB3 and 

CB3A) when two are installed in the unit. If only one output breaker (CB3) is installed, the setting is 

set to NO.

This selection is set at the factory. This setting allows the LCD to draw the Mimic accordingly and 

display PDU specific metering and alarm information.