19
R s+ s- c
+ - A B
FRONT SIDE VIEW
+ S
−
S-BUS ON
M3 UNIT CONTROLLER
Shields
+ S
−
S-BUS ON
M2 UNIT CONTROLLER
Shields
Lennox Yellow Jacket (27M19)
Do not connect shield
wire to Central Hub
+ S
−
S-BUS ON
M1-8 UNIT CONTROLLER
+ S
−
S-BUS ON
NTC
S-BUS ON
CS8500
CM+ CM-
S-BUS ON
Comfort Sensor
8
9
Shields
Shields
Shields
Shields
NOTE: For Comfort Sensor and CS8500, the S-Bus address used must match the NTC or Unit Controller S-Bus address in order to control that unit directly.
In addition, allow enough wire length to wire nut shield wires and located inside the wall behind the CS8500 and Comfort Sensor.
Each device on the S-Bus must have a unique S-Bus address
starting with 1 and sequential among the other devices.
Wire Nut
IMPORTANT
: Installation manuals for individual S-Bus devices may
show different configuration of shield wire grounding. The shielding
and termination guidance in this document supercedes all prior documentation.
IMPORTANT
: Do not attach shield wire to the Central Hub. This Central Hub is typically mounted
on drywall or other non-conductive surfaces and is not well grounded. Generally, roof-top unit
controllers will have better grounding and are preferred. Attach shield to ground on only one
roof-top unit controller.
NOTE
:
This figure shows the shield grounded at an M2 unit controller. Grounding to any unit
controller is sufficient. The figure is for illustration only.
Figure 6. iCON Central Hub to S-Bus Devices
