Universal Programmable Control Module (UPCM) Interface
BMTW-SVN01F-EN 117
Universal Programmable Control
Module (UPCM) Interface
Description
Universal programmable control modules (UPCMs) allow a Tracer Sum-
mit system to monitor and control HVAC equipment such as air handlers,
chillers, pumps, and generic loads. You can also use UPCMs to add
generic analog and binary inputs and outputs to Tracer Summit.
You can connect UPCMs to any Comm4 UCM communication link in the
BCU on TB2. The link provides a serial communication interface between
the BCU and each UPCM. For specific information about the number of
UPCMs allowed per BCU and per communication link, refer to Table 7 on
page 46. Make certain that the polarity is observed throughout the link.
For polarity information, refer to Figure 16 on page 47.
Type of Communication Card: Comm4
Refer to “Comm4 Card” on page 51.
Wiring Notes
To establish wiring connections between the UCM and the BCU, Trane
requires that you use the communication-link wiring specified in this-
manual. For wire selection specifications, see “UCM Communication-
Wire Characteristics” on page 55.
Use fiber-optic modems for building-to-building communication. If fiber
optics are not used, building-to-building communication wiring requires a
Transtector transient protector at each building. You can purchase Tran-
stector protectors through Trane. Contact your local Trane sales office for
details.
In a daisy chain configuration, use one pair of wires that start at the BCU
and go to all UCMs in a continuous loop. A branch configuration is possi-
ble if you need to tap into a daisy chain. Limit the total aggregate length
of the wiring for each communication link to 5,000 ft (1,524 m).
To connect communication wiring:
1. Attach one end of the communication-link wiring to TB2 on the BCU.
For the location of TB2, refer to Figure 16 on page 47.
2. Attach the other end of the communication-link wiring to the UPCM
at the ICS terminal. Refer to the UPCM installation literature for
connection points.
To connect shield:
Connect the shield at the BCU (TB2) to provide a drain for RFI/EMI, and
then splice it with other UPCM shields at the UPCM end. Tape the shield
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