77
18. L Connection Network
A network control panel and Network Control Panel PC software can be used to schedule building operation for any M2 or
M3 unit controller on the same daisy-chained L Connection
®
network.
18.1. Controllers
Up to 31 controllers can be daisy chained on a single L Connection network. Any combination of M1, M2, M3, NTC, and
BC controllers can be used (see figure 22).
Network Manager
Network Control
Panel
NON M3
BASED HVAC
Up to 31
Controllers
PC CONVERTER
ETHERNET
CONVERTER
PC
LAN
M2
M3
Signs
Fans
Lights
BC
NTC
M1
M1
Figure 22. L Connection Network
The network control panel is an L Connection direct digital controller used on units which are not equipped with an M3 unit
controller. The Building Controller (BC) is used to control building functions such as lights and signs. Use L connection
specific network cable and daisy chain as shown in figure 23.
SYS BUS TERMINAL BLOCK
ON LENNOX CONTROLLERS
IMC (M1-1 TO M1-6 L SERIES)
S-BUS TERMINAL BLOCK ON LENNOX
PRODIGY M2 OR M3 CONTROLLER
ENERGENCE SERIES
SYS BUS TERMINAL BLOCK ON LENNOX
CONTROLLERS IMC (M1-7, M1-8, NTC, BC
AND ZONE CONTROLLERS)
DO NOT CONNECT THE CABLE SHIELD TO THE ”G” TERMINAL ON M1-6 AND OLDER
C TERMINAL OF NCP TO + TERMINALS ON ALL CONTROLLERS.
CONNECT - TERMINAL OF NCP TO - TERMINALS ON ALL CONTROLLERS.
3
2
1
SHIELD
SHIELD
SHIELD
- S +
- S +
- G +
SHIELD
Cable type - twisted pair
with shield, 22 awg minim
um, Belden #88761 or
#8761 (Lennox 27M19,
94L63, 68M35).
CONTINUE WIRING TYP.
TO LAST CONTROLLER
ON NETWORK
Figure 23. L Connection
®
Network Daisy-Chain Communication Wiring
