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10
The Room Controller communicates using BACnet on the following types of network
segments:
•
ARC156 communicating at 156 kbps
•
MS/TP communicating at 9600 bps, 19.2 kbps, 38.4 kbps, or 76.8 kbps
NOTE
ARC156 is a unique implementation of the industry standard ARCNET. For a
summary of differences between ARCNET and ARC156, see the
ARC156 Wiring Technical
Instructions
For...
Use...
Maximum Length
ARC156
1
and
MS/TP
2
22 AWG, low-capacitance, twisted,
stranded, shielded copper wire
2000 feet (610 meters)
1
See the
ARC156 Wiring Technical Instructions
See the
MS/TP Networking and Wiring Technical Instructions
1
Remove power from the Room Controller.
2
Check the communications wiring for shorts and grounds.
3
Connect the communications wiring to the Room Controller's screw terminals labeled
Net +
,
Net -
, and
Shield
.
Ne
t +
Ne
t –
Sh
ie
ld
98
7 6 5 4
32
1
0
98
7 6 5 4
32
1
0
1 2 3 4 5 6 7 8
O
N
NOTE
Use the same polarity throughout the network segment.
4
If the Room Controller is at either end of a network segment, connect a BT485 to the
Room Controller.
Wiring for communications with a controller network
Wiring
specifications
To wire the Room
Controller to the
controller
network