Description of UCM types
BMTX-SVN01C-EN 65
LCI: LonTalk communication interface
Add-on LonTalk communication interface (LCI) cards enable Comm5
communication between a UCM and a Tracer Summit system. They are
used on various pieces of equipment such as air handlers, rooftop units,
and chillers. See Table 8 on page 57 for a listing of specific LCI interfaces.
If the controller does not come configured from the factory, use the Rover
service tool to configure the control mode.
Some UCMs may require other service tools to install LCI cards. At the
time of printing, the only instance of this is the LCI-C on the Tracer
CH530/531 controller, which requires the TechView service tool.
LCP: Lighting control panel interface
The lighting control panel (LCP) allows Tracer Summit to control build-
ing lighting circuits (typically in accordance with Time of Day schedules)
and monitor physical switch and telephone inputs. The LCP allows coor-
dination of the lighting circuit operation with other building management
functions, like Time of Day scheduling.
The LCP communicates on a isolated Comm3 communication link, via the
LCP Supervisor. The LCP Supervisor provides a communication interface
between the LCP and the BCU. The LCP Supervisor has two serial com-
munication links:
• The first link allows it to communicate with the Tracer Summit BCU
over a twisted, shielded pair of wires.
• The second communication link allows the LCP Supervisor to commu-
nicate with the LCP panels.
The LCP Supervisor is a communication link translator and a pathway
for multiple LCPs. Only one LCP Supervisor can exist on the communica-
tion link. For specific information about the number of LCPs allowed per
BCU and per communication link, see Table 5 on page 33.
Wiring requirements
To establish connections between the UCM and the BMTX BCU, refer to
the specifications on wire type, topology, and wiring procedures in “” on
page 34. For communication wiring terminal locations and wiring proce-
dures for the LCP, refer to lighting control panel literature.
Device addressing
Each LCP supervisor must have a unique address on the LCP communi-
cation link. The LCP supervisor address is set using a DIP switch on the
LCP supervisor. The supervisor is transparent to the BCU. Each LCP
UCM must also have a unique address that is set using a DIP switch on
the LCP.
Assign each LCP a unique address number by setting the DIP switch
labeled Options Select on the logic board. Switch positions are labeled 1
through 8. Valid LCP addresses range from 82 to 126. Press and release
the reset button after setting the address of the LCP.
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