Communications wiring
Unit Ventilator
CARRIER CORPORATION ©2019
Integration Guide
All rights reserved
11
Unique rotary address switches 1 – 99. If controllers have duplicate addresses, network communication can
be lost.
Unique BACnet Device Instance numbers. Default is 16101XX, with the rotary address switches defining XX. If
controllers have duplicate device instance numbers, network communication can be lost.
NOTES
If RX LED is solid, then the terminations are incorrect.
If the network has greater than 32 devices or exceeds 2,000 feet, a Repeater should be installed.
If a controller begins or ends a network segment, a terminating resistor may be needed.
The controller recognizes physical changes (DIP switches, rotary switches, and jumpers) upon power up.
Refer to Appendix A for the Network Points list.
Refer to Appendix D for the Protocol Implementation Conformance Statement.
Software settings
defined through the Equipment Touch device. To confirm settings, obtain a Modstat of the
device. On the Equipment Touch, click the link to the Modstat.
Modbus
To set up the Unit Vent for Modbus RTU
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
.
