26
IM620-1
Figure 13. AMP Connector - CIC Connection
Signal
Pin
AMP Plug
–
6
GND
5
RD
3
–
2
TD
1
White
Black
Shield
Uncased end
of CIC
2.
Connect the CIC to the absorption chillers unit controller display processor port.
3.
Verify communications have begun between the MAG Panel and the absorption chiller unit
controller.
Note:
There are two ways to verify communications between the MAG and the absorption unit
controller. (1) two LEDs on the unit controller display processor cycle on and off or (2) the amber
LED on the MAG controller stays on for 1 second and goes off for 1 second if communications
exists (see Table 4, “Amber Status LED Indication
”
, in the “Component Data” section of this
manual).
If communications does not exist between the MAG and the absorption chiller unit controller,
check the following:
§
Check the CIC wiring
§
Check the field wiring to the MAG Panel or connection to port A if an AMP connector was
used.
§
Check to see if the MAG Panel and the absorption chiller unit controller are energized.
Direct Connect MAG Controller Connection
The Direct Connect MAG is a level-1 controller that connects directly to the absorption chiller unit
controller via a communications interface cable (CIC).
1.
Set the network address of the MAG controller to 00 (level 1). See “Addressing the Controllers”
above for more information.
2.
Push the circuit breaker (CB1) button to power up the MAG controller and verify that there is
power to the MCB by observing the LEDs.
3.
Connect the uncased end of the CIC to the MAG controllers field wiring terminals as follows:
Table 12. Direct MAG Controller - CIC Connection
Wire Color
MAG Controller Terminal
White
T11–B+
Black
T11–B–
Shield
T11–GND
or
1b. Connect an AMP-type connector to the uncased end of the CIC for direct connecting to the
MAG controllers port A (see Figure 13).
2.
Connect the CIC to the absorption chillers unit controller display processor port.
