Technical Specifications

Liebert XD Cooling Modules—Liebert XDCF, Liebert XDH, Liebert XDO, Liebert XDR and Liebert XDV
56
4.8 Connecting Low-Voltage Wiring—Liebert XDH Smart Modules
Low-voltage connections are available only on the Liebert XD smart module. The low-voltage
connections for Liebert XDH smart modules are in the rear of the modules. There are two connection
locations, one for the lower bank of fans and one for the upper bank of fans. The power connections
are shown in Figure 57; the communication ports are on the rear left side of the Liebert XDH.
These dry contacts can to be connected to a monitoring unit, such as Liebert SiteScan
®
. Make
connections on these modules according to site-specific drawings. The module must be installed in
accordance with national and local wiring regulations.
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 57 Low-voltage connections—Liebert XDH smart module
Condensate Detection,
Remote Shutdown [37,38]
and Alarm Relay Dry
Contacts/Low Voltage
Connections (82 thru 87).
DPN001180
Page 6, Rev 5
Bottom Half of the XDH_S
P66/P67
Top Half of the XDH_S