Carrier 30MP - BACnet Network Communications; Wiring for BACnet MS;TP and ARC156

Installing the controller
30MP Multi-chiller CARRIER CORPORATION ©2018
Installation and Start-up Guide All rights reserved
6
EXAMPLE
If the controller’s address is 25, point the arrow on the
Tens
(
10's
) switch to 2 and the arrow on
the
Ones
(
1's
) switch to 5.
10's
1's
1
3
4
5
2
7
8
9
6
0
1
3
4
5
2
7
8
9
6
0
CAUTION
The factory default setting is
00
and must be changed to successfully install your controller.
Wiring for communications
The controller communicates using BACnet on the following types of network segments:
• MS/TP communicating at 9600 bps, 19.2 kbps, 38.4 kbps, or 76.8 kbps
• ARC156 communicating at 156 kbps
NOTE
For more networking details, see the Open Controller Network Wiring Installation Guide.
Wiring specifications for BACnet MS/TP and ARC156
Cable: 22 AWG or 24 AWG, low-capacitance, twisted, stranded, shielded copper wire
Maximum length: 2000 feet (610 meters)
WARNING
Do not apply line voltage (mains voltage) to the controller's ports and terminals.
To wire the controller to the BACnet network
1 Pull the screw terminal connector from the controller's power terminals labeled
24 Vac
and
Gnd
(
Return
).
2 Check the communications wiring for shorts and grounds.
3 Connect the communications wiring to the controller’s screw terminals labeled
Net +
,
Net -
, and
Shield
.
NOTE
Use the same polarity throughout the network segment.