Bryant 548J A Series Installation Instructions Manual page 17

RTU- -MP control system
The RTU- - MP controller, see Fig. 28, provides expanded
stand- - alone operation of the HVAC system plus
connection and control through communication with
several Building Automation Systems (BAS) through
popular third- - party network systems. The available
network systems are BACnet MP/TP, Modbus and
Johnson J2. Communication with LonWorks is also
possible by adding an accessory interface card to the
RTU- - MP. Selection of the communication protocol and
baud rate are made at on- - board DIP switches.
Fig. 28 - - RTU- - MP Multi- - Protocol Control Board
Fig. 29 - - 548J***A Control Box Component Locations
The RTU- - MP control is factory- - mounted in the
548J***A unit's main control box, to the left of the CTB.
See Fig. 29. Factory wiring is completed through
harnesses connected to the CTB. Field connections for
RTU- - MP sensors will be made at the Phoenix connectors
on the RTU- - MP board. The factory- - installed RTU- - MP
control includes the supply- - air temperature (SAT) sensor.
The outdoor air temperature (OAT) sensor is included in
the FIOP/accessory EconoMi$ert2 package.
Refer to Table 3, RTU- - MP Controller Inputs and Outputs
for locations of all connections to the RTU- - MP board.
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