McQuay IM 743

8 IM 743-1
A. Route the network cable through the third knockout from the left and over to the Modbus
Communication Module.
1. Connect the Modbus Communication Module to the network (see Figure 5 and Figure
6.)
a. Connect one wire of the network cable to Pin 2 of the connector plug.
b. Connect the other wire to Pin 3 of the connector plug.
c. No wire is connected to the remaining pin.
Figure 3. Serial Card Slot Location on Unit Controller
®
Air Conditioni ng
S
erial
C
ard
S
lot
Figure 4. Serial Card Slot Detail
J4
J5
V
G
V
G
0
Y
1
Y
2
Y
3
Y
4
I
D
1
I
D
2
I
D
3
I
D
4
I
D
5
I
D
6
I
D
7
I
D
1
5
H
I
D
1
5
I
D
C
1
5
J19
8-Pin Connector
for Communication
Module