The RS-232 port uses an Emerson
port enables a more secure connection instead of the USB cable, to the computer or server that has
Liebert MultiLink installed.
Terminal Block Communication
The Terminal Block includes eight pins, as shown in Figure 40.
Figure 40 Terminal Block Communication pin layout
Any Mode Shutdown
The purpose of Any Mode Shutdown is to shut down the UPS output by turning Off the rectifier,
inverter and static switch so that there is no power to the loads.
Any Mode Shutdown can be operated locally or remotely:
• Local Any Mode Shutdown can be performed by shorting Pin 1 and Pin 2.
• Remote Any Mode Shutdown can be performed using a switch connected to Pin 1 and Pin 2 and
mounted at a remote location.
Remote Power Off will be performed either by NO or NC contact of Any Mode Shutdown,
depending on the settings in the configuration program.
A current-limited source for this optocoupler (+12VDC, 50mA) will be available from the UPS.
The connection to the UPS for remote connection will be via terminal block connector.
Any Mode Shutdown wiring must conform to all national, regional and local wiring
When the Auto-Enable output option is selected and the UPS output is disabled using Pin 1
and Pin 2, the Liebert GXT4's output can turn On automatically and without warning if the
Pin 1 and Pin 2 connection is changed.
proprietary protocol that is for use with Liebert MultiLink
On Battery Mode