Installation
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7
IM 743-7 • MICROTECH II CHILLER UNIT CONTROLLER
Figure 7: Serial Card Slot Connectors
NOTE:
This operation relies more on fitting the
communication module into the connector than
seeing the connectors mate.
6. Insert the communication module, pointed up, into the
slot. Keeping it
level
, roll the module into position as
you guide it into the slot, feeling the connectors line up
(
Figure 8
, Steps 1 and 2).
7. When you feel the connectors align, press the
communication module into the plug. Verify that the
module is firmly connected (
Figure 8
, Step 3).
8. Mount the plastic cover on the serial card slot. Slip the
cover over the network connector plug (
Figure 9
).
9. Connect the communication module to the network
(
Figure 10
and
Figure 11
):
a. Route the network cable through the knockout and
to the communication module.
b. Connect one wire of the network cable to Pin 2 of
the connector plug.
c. Connect the other wire to Pin 3 of the connector
plug. Note that no wire is connected to Pin 1
(GND).
Figure 8: Inserting the Modbus Communication Module
Step 1
Step 2
Step 3
