Owner's manual

Publication GMSI10-UM003D-EN-P - May 2010

Table 2.1 shows the on-board relay connections for the XM-123.

Figures 2.9 and 2.10 illustrate the behavior of the NC and NO terminals when

the relay is wired for failsafe, alarm or nonalarm condition or non-failsafe,

alarm or nonalarm condition.

IMPORTANT

All XM relays are double pole. This means that each relay

has two contacts in which each contact operates

independently but identically. The following information

and illustrations show wiring solutions for both contacts;

although, in many applications it may be necessary to wire

only one contact.

TIP

The Expansion Relay module may be connected to the

module to provide additional relays. Refer the XM-441

Expansion Relay Module User Guide for wiring details.

IMPORTANT

The NC/NO terminal descriptions (page 20) correspond

to a de-energized (unpowered) relay.

When the relay is configured for non-failsafe operation, the

relay is normally de-energized.

When the relay is configured for failsafe operation, the

relay is normally energized, and the behavior of the NC and

NO terminals is inverted.

Table 2.1 Relay Connections for XM-123

Configured for

Failsafe Operation Relay 1 Terminals

Nonalarm Alarm Wire Contacts Contact 1 Contact 2

Closed Opened COM 47 50

NO 48 49

Opened Closed COM 47 50