Description of UCM types
BMTX-SVN01C-EN 71
RTA-RTW chiller interface
RTA-RTW UCMs allow Tracer Summit to monitor, control, and configure
air-cooled chillers and water-cooled chillers. The RTA-RTW interface pro-
vides an isolated Comm3 communication link or a Comm5 communica-
tion link between the BCU and each RTA-RTW chiller. For specific
information about the number of RTA-RTWs allowed per BCU and per
communication link, refer to Table 5 on page 33.
Wiring requirements
To establish wiring connections between the UCM and the BMTX BCU,
refer to the specifications on wire type, topology, and wiring procedures in
“Comm3/Comm4 wiring procedure” on page 36 or in “Comm5 wiring pro-
cedure” on page 44. Attach the communication link wiring to the RTA-
RTW UCM at TB2-1 and TB2-2 on the CSR board.
Device addressing
Each UCM must have a unique address. For RTA-RTW UCMs communi-
cation on Comm3 links, addresses are set from the front panel. Refer to
the RTA/RTW installation, operation, and maintenance manual for
details. For RTA-RTW UCMs communicating on Comm5 links, each CUM
has a Neuron ID that provides a unique address.
19 OFF OFF on on OFF on OFF OFF
20 on on OFF on OFF on OFF OFF
21 OFF on OFF on OFF on OFF OFF
22 on OFF OFF on OFF on OFF OFF
23 OFF OFF OFF on OFF on OFF OFF
24 on on on OFF OFF on OFF OFF
25 OFF on on OFF OFF on OFF OFF
26 on OFF on OFF OFF on OFF OFF
27 OFF OFF on OFF OFF on OFF OFF
28 on on OFF OFF OFF on OFF OFF
29 OFF on OFF OFF OFF on OFF OFF
30 on OFF OFF OFF OFF on OFF OFF
Note:
• DIP switches 7 and 8 must always be off.
• Cycle power off/on after changing settings.
Table 16. PCM address settings (Continued)
UCM
address
PCM DIP switch settings
S2-1 S2-2 S2-3 S2-4 S2-5 S2-6 S2-7 S2-8
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