Emerson GXT4 User's Guide download pdf (Page 42)

Communication

Liebert

GXT4

™

5.3 RS-232 Port

The RS-232 port uses an Emerson

proprietary protocol that is for use with Liebert MultiLink

. This

port enables a more secure connection instead of the USB cable, to the computer or server that has

Liebert MultiLink installed.

5.4 Terminal Block Communication

The Terminal Block includes eight pins, as shown in Figure 42.

Figure 42 Terminal Block Communication pin layout

5.4.1 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.

NOTE

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

regulations.

WARNING

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.

Low Battery

On Battery Mode

Battery Mode

Shutdown

Any Mode

Shutdown

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Emerson GXT4 User's Guide Page 42