Chapter 4 UCM Communication-Link Wiring
50 BMTW-SVN01F-EN
Non-Isolated Comm3 Card
This card is used for Trane VAV I and TRS communication. This is the
same link that was previously provided from the VAV command unit to
the Trane VAV I UCM. VAV command units are not required nor are they
supported for Tracer Summit installations. A maximum of two of these
cards per BCU can be used for VAV applications; one per BCU for Tracer
1000 TRS panels.
Note the color of the card (red), the numbers on the label, and the physi-
cal characteristics of the card as shown in Figure 19.
Figure 19. Non-Isolated Comm3 Communication Card
Figure Note:
Trane Part Number 4020 0907
Card identification tag: 50100738
Service part number: BRD0934
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