Unit installation

Electrical Connections

Positioning the 2T Sensor Rack Probes on a Rack

To help ensure proper cooling, use the following guidelines to place the Liebert 2T sensor probes:

• on the top of the perforated rack door.

• in front of the highest-mounted servers in the rack.

• in front of the highest-density area of the rack.

• in the airflow path entering the rack.

• Do not place the probe directly on the metal surface of the perforated door.

To connect the temperature probes, use only cable with the following characteristics:

• 6 wires, 3 couples, shielded twisted pair

• termination: RJ-12

• coupling: according to Liebert iCOM user manual, SL-18835)

Option A:

• 3 x 2 x 0.14 mmq (min), twisted pairs, shielded

• plenum rated

• 300V

• (23/158

°F / -5/+70°C)

•flexible

• characteristic impedance of 108-132 Ohm @50kHz

• conductor resistance < 150 Ohm/km

•flame-retardant

• black jacketing

Option B:

•24AWG

• STP (Shielded Twisted Pair)

• CMP (plenum rated)

• <15pF capacitance per foot

• 300V

•140

°F / 60°C

• black jacketing

• flexibility: must maintain a certain, unspecified flexibility

• UL and CSA approved