Communicator | 3.05
32
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 two pair
twisted shield cable.
•
This cable is daisy-chained to all controllers and to external connection box.
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.
6.3.2 RS-485 Approximate Distances & Baud Rates
For one controller
For 10 controllers:
•
2000 meters (~6500 feet): 9600 Baud
•
~1200 meter (~4000 feet): 9600 Baud
•
~2500 meters (~8200 feet): 4800 Baud
•
~1800 meter (~6000 feet): 4800 Baud
•
~3000 meters (~9800 feet): 2400 Baud
•
~2400 meter (~7870 feet): 2400 Baud
NOTE:
Baud rate is dependent on cable length and number of controllers.
