Tunnel Master® wbc Installation Guide
Page 43
Communications Wiring
This chapter describes wiring for RS-232, RS-422 and RS-485 communications.
Installation Requirements
All equipment connected to the RS-232 ports must be Listed, have an Electronics Industrial
Association (EIA) standard RS-232 communications protocol, and not be installed over a
hazardous location.
RS-232 communication must not exceed 100 feet. RS-232 communication wires must be in a
separate PVC conduit away from any AC wire.
Communications equipment signal wires must also be run in separate rigid PVC or metal
conduit, separate from any power conduit.
24/4 Comm Cable (can be purchased from ICS).
RS-232 COMM Terminal Wiring Diagram
Wiring to be done on the main CPU board.
9
1
2
3
4
5
6
7
8
PIN 1
PIN 6
PIN 2
PIN 7
PIN 3
PIN 8
PIN 4
PIN 5
PIN 9
DB-9 CONNECTOR FOR A
LAPTOP OR
PC
COMPUTER CONNECTION
ICS
24/4
COMM CABLE
TWO RS-232 COMM
TIERS LOCATED ON THE MAIN
CPU BOARD
Wiring to be done on
the Main CPU Board
GND
5V
TX
RX
Figure 38. RS-232 Comm Terminal Wiring Diagram (Main CPU Board)
