Trane Building Automation System, BMTK-SVN01D-EN manual Wire the UCMs, Wire specifications

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Wire the UCMs

Wire the UCMs

The Comm5 communication link connects unit control modules (UCMs) to the Tracker termination module. Each controller has one Comm5 communication link. This topic includes information and procedures for wiring a UCM to a termination module:

Note:

Do not exceed the maximum number of UCMs that can communicate on a Tracker controller (see “UCM maximum capacities for Tracker models 12 and 24” on page 10 for details).

Wire specifications

Tracker Comm5 communication-link and sensor wiring is low-voltage Class 2 wire and must be field-supplied and installed in compliance with NEC and local codes. To prevent electrical noise interference, all wiring must comply with requirements outlined in this topic for wire selection and link-wiring topology.

Trane recommends that you use Level 4 (Echelon) shielded cable for the Tracker communication link wiring between the Tracker and the Comm5 UCMs to which it communicates. Trane also recommends that you use it for communication wiring between the VariTrac CCP and its associated VariTrac or VariTrane UCMs, and for sensor wiring to these devices.

Level 4 cable is available in shielded, plenum and non-plenum versions. Level 4 cable is available from Trane-approved suppliers as well as other suppliers. Table 7 on page 30 shows the Trane approved suppliers; Table 8 on page 31 provides the specifications for Level 4 compliant cables.

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