© Munters AB, 2017
9
3.6
Connecting the Comm-Box to a Controller
The only step in installing a Comm-Box that requires wiring is if the Comm-Box is connected directly to a
controller (instead of a Communicator). In this situation the Comm-Box must be wired to the controller
communication card.
1. Disconnect the power to the controller!
WARNING!
Power must be disconnected before beginning.
2. The Comm-Box's COM port connecter comes pre-wired. Insert the connector into COM 1.
3. In the controller, connect the Comm-Box to the controller's communication card. Refer to the
following illustrations.
1. Connect the wiring as follows:
•
COM to COM
•
The Comm-Box TX port is connected to
Controller's RX port.
•
The Comm-Box RX port is connected to
Controller's TX port.
2. The cable between the Comm-Box and the
controller should be a 3 Wire Shielded Cable
(22 AWG minimum).
3. Connect the cable shield wire to the controller
ground strip.
4. Connect the wiring according to the following
table:
Port
Color Wire
COM
Brown
TX
Green
RX
White
+
Red
-
Black
COM
Shield wire
Figure 1: RS-232 Wiring
