© Munters AB, 2018
15
4.2.2
RS-232
C
ONNECTIONS
The following section details how to set up an RS-232 connection between the Communicator and the
controllers.
Figure 4: Connecting the External Connection Box to Controllers via RS-232 Cards
Figure 4 key
1 Communicator External Box
5 Shield cable
2 Box communication ports
6 Other controllers
3 Connect one end of the cable's shield only. Each
controller should be chain connected to the same wire,
resulting in a long ground cable without ground loop
and Baud Rate, page 17
4 Controller communication card
•
The cable between the external connection box and the controllers should be a shielded cable
(22 AWG).
•
This cable is connected to all controllers and to the communication line of the external
connection box in the following manner:
o
The COM wire is connected to the COM port in the communication terminal of the
controller (green wire).
o
The Communicator External Box TX in the connection box is connected to RX in the
controller (red wire).
o
The Communicator External Box RX in the connection box is connected to TX in the
controller (black wire).
o
The shield should be connected to the earth (safety ground).
CAUTION
Connect the shield (safety ground) only on one side!
