RT-SVX36G-EN 17
General Information
Generic Building Automation System Module
(GBAS - Optional 1U51 used with non-Trane building control systems; 0-5 or
0-10 VDC)
The Generic Building Automation System (GBAS) module allows a non-Trane building control
system to communicate with the rooftop unit and accepts external setpoints in form of analog
inputs for cooling, heating, supply air pressure, and a binary Input for demand limit. Refer to the
“Field Installed Control Wiring” section for the input wiring to the GBAS module and the various
desired setpoints with the corresponding DC voltage inputs for both VAV and CV applications.
Phase Monitor (1U3)
Continuously monitors line voltage to protect against phase, loss, imbalance and reversal. If a fault
is found with the supply voltage a LED on the phase monitor will indicate a fault and a unit External
Auto Stop is activated through the controls.
Multipurpose Module
MPM (1U105)
The Multipurpose Module (MPM) receives information from the Return Plenum Pressure sensor
and provides for Return Fan control to maintain this pressure to the Active Return Plenum Pressure
Setpoint and Deadband. The liquid line pressure sensor inputs for the refrigeration circuits are
received through the MPM in support of head pressure control on Evaporative condenser units.
Input Devices & System Functions
The descriptions of the following basic Input Devices used within the UCM network are to acquaint
the operator with their function as they interface with the various modules. Refer to the unit's
electrical schematic for the specific module connections.
Figure 2. Velocity Pressure Transducer/Solenoid Assembly
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