IM620-1
17
Figure 7. Typical Field Wiring Schematic: Network Connect MAG
Port
B
MCB
MCB
Network Connect MAG #1
L1
L2
MCB
Network Connect MAG #2
L1
L2
Microprocessor
Microprocessor
Absorption Chiller
Unit Controller
Absorption Chiller
Unit Controller
Level-1 Controller
(eg. OPM, NMP)
Port
A
A+
A-
GND
B+
B-
GND
To Open Protocol BAS Integrator
or Personal Computer
B+
B-
GND
B+ B- GND
A+
A-
GND
A+
A-
GND
ICM Terminal
Board
ICM Terminal
Board
Communications
Interface Cable
Communications
Interface Cable
Hot
Neutral
Hot
Neutral
Legend
Field Wiring
Terminal
Cable: Shielded,
Twisted and
Jacketed Pair
with Drain Wire
Factory Wiring
Field Wiring
Line
Input
Line
Input
WHT
BLK
BLK
WHT
WHT
BLK
See Note
a0167
Wiring Instructions–Direct Connect MAG
The Direct Connect MAG field wiring consists of connecting the MAG to the absorption chiller
controller.
As shown in Figure 8, field wiring to port B can be accomplished by connecting the wires from the
Communications Interface Cable (CIC) to terminals B+, B–, and GND in the MAG.
Port A is used for communications with an Open Protocol BAS or connection to a PC in a MicroTech
network.
