Lennox PRODIGY2.0 - 1.3. M3 Unit Controller Layout and Connections

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1.3. M3 Unit Controller Layout and Connections
L CONNECTION
(optional connec
tion method for unit
controller software)
USB CONNECTION
(for unit controller
software)
OR
BACnet or
LonTalk
SmartWire
connections
To disconnect
TSTAT.COM from
COM cut jumper.
To disconnect
HMD.COM from
COM cut jumper.
EXPANSION
PORT
EXPANSION
PORT
Connection for
C3 Control
(A178)
cv
Connection for
GP3 Control
(A178)
Connection for
additional
daughter-board
MODBUS
connector
Only on
104661-xx)
Figure 1. Original M3 Unit Controller (A55) and Expansion Port Locations