Trane Tracer Summit Hardware And Software Installation Manual page 115

Chapter 5 UCM Wiring and Addressing
100
the last UCM in the chain to prevent any connection between the shield
and ground (see Figure 49 on page 102).
Note:
Observe the polarity throughout communication links.
IMPORTANT
UCM ground loops will cause a malfunction.
Figure 47. Location of the Address DIP Switches on the CGA/CGW
UCM
BMTW-SVN01F-EN