© Munters AB, 2018
17
•
The final controller in any chain or branch requires a 120 ohm terminator.
Figure 6: Connecting the External Connection box to Controllers via RS-ISO485 Cards
•
The cable between the external connection box and the controllers should be a 4 wire twisted
shielded cable (22 or 24 AWG).
•
Wiring:
o
1
st
pair:
Red wire to the controller's terminal A and the external connection box's
terminal A.
Black wire to the controller's terminal B and the external connection box's
terminal B.
o
2
nd
pair:
Green wire to the controller's COM terminal and the external connection
box's COM terminal.
•
The final controller in any chain or branch requires a 120 ohm terminator.
4.2.4
A
PPROXIMATE
D
ISTANCES AND
B
AUD
R
ATE
•
For one controller:
o
~2000 meters (~6500 feet): 9600 Baud
o
~2500 meters (~8200 feet): 4800 Baud
o
~3000 meters (~9800 feet): 2400 Baud
