Communications wiring
Fan Coil
CARRIER CORPORATION ©2020
Integration Guide
All rights reserved
11
Modbus
To set up the Fan Coil for Modbus RTU
1
Turn off the power for the Fan Coil 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 a
rrow 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 Fan Coil 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 DIP switch
3
OFF and
4
ON for Modbus.
The following example is set for 38.4 kbps and Modbus.
6
Connect the communications wiring to the
Comm
port in the screw terminals labeled
Net +
,
Net -
, and
Shield
.
Содержание Fan Coil
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