Liebert EM User Manual

This section provides instructions for installing, mounting and connecting power and other cables to 

the OpenComms EM.

The OpenComms EM must be installed indoors where electrical service is available. The unit should 

be placed where it can be easily accessed for connecting the unit to a modem, a computer or a network 

hub and, if used, serial devices. 
The unit may either be mounted on a wall or be placed on a surface, depending on the user’s applica-

tion and the location of equipment to be connected and monitored. Consider the length of the sensor 

cable and the distance to the monitored area when deciding where to place the OpenComms EM, 

whether you use the 1-ft. (0.3m) cable provided with the unit or the optional 15-ft. (4.6m) cable that 

may be purchased separately.

• Before unpacking the OpenComms EM, inspect the shipping carton for damage or signs of mis-

handling, such as gashes or holes in the carton or severely flattened corners.

• Open the shipping carton carefully. Use care to avoid puncturing the container with sharp objects 

that might damage the contents.

• Inspect the OpenComms EM and all included components for damage. See Table 3 for a list of 

items that should be included with each model.

• If any damage from shipping or mishandling is observed, immediately file a damage claim with 

the shipping agency and forward a copy to:

Liebert Corporation

Attn: Traffic Department

1050 Dearborn Drive

P.O. Box 29186

Columbus, OH 43229

TMNET

THCMNET

TMPDUNET

THCMPDUNET

vEM-14

• EM Controller - 2 sensor ports

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• EM PDU Controller - 2 sensor ports, 2 serial ports

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• vEM-14 Controller - 4 sensor ports, 2 serial ports

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• CD with software and user manual

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• Power supply

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✔

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• Quick-start guide

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• Temperature sensor, 1 ft. (0.3m)

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• Temperature & humidity combination sensor, 

1 ft. (0.3m)

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• Built-in temperature and humidity sensor

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• Serial cable for MP Advanced Power Strips,

5 ft. (1.5m)

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• Contact closure cable, 15 or 100 ft. (4.6 or 30.5m)

• Humidity sensor, 15 or 60 ft. (4.6 or 18.3m)

• Water detection sensor, 15 or 60 ft. (4.6 or 18.3m)

• Temperature sensor, 15 or 60 ft. (4.6 or 18.3m)

• Serial cable for MP Advanced Power Strips,

10 ft. (3m)

• Temperature & humidity combination sensor, 

15 or 60 ft. (4.6 or 18.3m)