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RTU--MP control system
The RTU--MP cont roller, see Fig. 47, provides expanded
stand--alone operation of the HVAC system pl us
connec tion and control t hrough communication wit h
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 switche s.
The RTU--MP control is fact ory--mounted in the 50TCQ
unit’s main control box, to the left of t he CTB. See
Fig. 48. Factory wiring is completed through harnesses
connected to the CTB. Field connections for RTU --MP
sensors will be made a t the Phoenix connectors on the
RTU--MP board. The factory--installed RTU--MP control
includes t he supply--air temperature (SAT) sensor. The
outdoor air temperature (OAT) sensor is included in the
FIOP/accessory EconoMi$er2 package.
Refer to Table 8, RTU--MP Controller Inputs and Outputs
for locations of all connections to the RTU--MP board.
C07129
Fig. 47 -- RTU--MP Multi--Protocol Control Board
C08652
Fig. 48 -- 50TCQ Control Box Component Locations
50TCQA
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