Emerson GXT3 230V user manual Communication Interface Port, Dry Contact, Any Mode Shutdown

Communication

9.0COMMUNICATION

9.1Communication Interface Port

The Liebert® GXT3™ UPS has a terminal block on the rear of the UPS unit. Several signals are provided on this port and are assigned as follows.

9.2Dry Contact

The Dry Contact includes eight pins, as shown in Figure 14.

Figure 14 Dry contact pin layout

1

2

3

4

(Low Battery	Warning)	(Any Mode	Shutdown)
	(On- Battery	Warning)	(Battery Mode	Shutdown)

9.2.1Any 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 the pins in Set 3.

•Remote Any Mode Shutdown can be performed using a switch connected to the pins in Set 3 and mounted at a remote location.

Activation of the Any Mode Shutdown will be logged as an event in the event history log.

NOTE

Remote Power Off will be performed either by NO or NC contact of Any Mode Shutdown. The current limited source (+12VDC, 50mA) will be available from UPS.

The connection to UPS for remote connection will be via terminal block connector.

Any Mode Shutdown wiring must conform to all national, regional and local wiring codes and laws.

! WARNING

When the Auto-enable output option is selected and the UPS output is disabled using the pins in Set 3, the Liebert GXT3-G’s output can turn On automatically and without warning if the connection of the pins in Set 3 is changed.

9.2.2Battery Mode Shutdown

Battery Mode Shutdown permits shutting down the UPS by turning off the rectifier, inverter and static switch so that there is no power to the load when the UPS is On Battery. The auxiliary power for the UPS will still be active.

Battery Mode Shutdown can be performed locally or remotely:

•Local Battery Mode shutdown can be performed by shorting the pins in Set 4.

•Remote Battery Mode Shutdown can be performed using a switch connected the pins in Set 4 and mounted at remote location.

Activation of the Battery Mode Shutdown will be logged as an event in the event history log.

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