Communications wiring
Unit Ventilator
CARRIER CORPORATION ©2019
Integration Guide
All rights reserved
4
BACnet MS/TP
To set up the Unit Vent for BACnet MS/TP
The Unit Vent’s latest supported function codes and capabilities are listed on the associated Protocol
Implementation Conformance Statement (PICS),
Carrier BACnet PICS website
http://www.bacnetinternational.net/catalog/index.php?m=28
NOTE
This controller counts as a full load on the MS/TP bus.
1
Turn off the power for the Unit Vent by disconnecting power terminals.
2
Using the rotary switches, set a unique address. Set the
Tens
(
10's
) switch to the tens digit of the address,
and set the
Ones
(
1's
) switch to the ones digit.
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
45
2
7
8
9
6
0
1
3
45
2
7
8
9
6
0
NOTE
The Unit Vent recognizes its address only after power has been cycled.
3
Set communications selector for
EIA-485
.
4
Set DIP switches
1
and
2
for the appropriate communications speed. See table below.
NOTE
Use the same baud rate for all devices on the network segment.
Baud Rate
1
2
9,600
bps
Off
Off
19.2
kbps
Off
On
38.4
kbps
On
Off
76.8
kbps
On
On
5
Set the both DIP switches 3 and 4 OFF for BACnet MS/TP.
The following example is set for 38.4 kbps and BACnet MS/TP.
