BMTX-SVN01C-EN 31
Chapter 5
UCM communication link
wiring and topology
Types of communication links
Unit control module (UCM) communication links are used to connect
UCMs to the BMTX BCU. Each BMTX BCU has four communication
links, which are predefined to support various communication protocols.
They are:
• One isolated Comm3 link
• Two Comm4 links
• One Comm5 link
Figure 16 on page 32 shows a Tracer Summit system with representative
types of supported UCMs wired to the appropriate communication link.
Maximum quantity of UCMs per BMTX
BCU
The quantity of each type of UCMs that BMTX BCUs can accommodate is
shown in Table 5 on page 33. For information on how to determine the
number of BMTX BCUs required to meet the specifications of a Tracer
Summit application, see the Building Control Unit Sizing for Version 17
Tracer Summit Systems engineering bulletin (BAS-SLB005-EN).
Note:
Part numbers listed in this chapter were current at the time of
publication. Contact Trane if more information is needed to
order appropriate parts.
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