Technical Specifications

Liebert XD Cooling Modules—Liebert XDCF, Liebert XDH, Liebert XDO, Liebert XDR and Liebert XDV

4.11 Low-Voltage Wiring—Liebert XDO Smart Modules

Low-voltage connections to the Liebert XDO are available only on smart modules.

Viewing the Liebert XDO from the front or from above, the low-voltage terminal block is on the right

side of the module (see Figure 65). Make low-voltage connections on these modules according to site-

specific drawings. The module must be installed in accordance with national and local wiring regula-

tions.

For Liebert XDO smart modules, the low-voltage connections are on the electric box inside the Liebert

XDO. Knockouts for the low-voltage connections are on the front of the Liebert XDO, near the top (see

Figure 65).

Terminal block connections 37, 38 and 82 through 87 can be connected to a monitoring unit, such as

Liebert SiteScan

. The remote shutdown, condensate detection alarm and fan failure alarms operate

independently of each other.

• Contacts 37 and 38 are for remote shutdown.

• Contacts terminals 82, 83 and 84 are activated by the condensate detection alarm.

• T82 is used for normally open contact closure requirements.

• T83 is common.

• T84 is used when normally closed contact closure is required.

• Contacts terminals 85, 86 and 87 are activated by the fan failure alarm.

• T85 is for normally open contact closure requirements.

• T86 is common.

• T87 is used when normally closed contact closure is required. The condensate detection alarm

and the fan failure alarm operate independently of each other.

• P66 and P67 are CAN bus ports.

Figure 65 Low-voltage wiring—Liebert XDO smart modules

TOP

Rear

of Liebert

XDO

DPN000771

Rev. 9

Electric Box

(Access is through

hinged fan tray)

Electric Box

Low-Voltage Terminal Block

Condensate Detection,

Remote Shutdown [37,38] and

Alarm Relay Dry Contacts-low

voltage connections [82 thru 87]