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Figure 9: Communication Module Inserted
10. Insert the network cable connector into the
communication module
a. Connect one wire of the network cable to Pin A of
the connector plug.
b. Connect the other wire to Pin B of the connector
plug. Note that no wire is connected to the GND
Pin.
11. Attach the ferrite enclosure (optional - see
Replacing a Communication Module
Follow these steps to remove an existing communication
module from unit controller and replace it with a new one.
1. Remove power from the unit controller.
2. Locate the serial card slot on the unit controller
(Figure
3) and pull the network cable connector from the
communication module
3. Remove the cover from the serial card slot. Use a small
screwdriver to carefully pry it off from one end
4. Grasp the communication module, with the network
connector on the underside. The 8-pin header must
mate to the 8-pin plug in the unit controller. The plug has
a guide on each end to direct it into the mating guide
on the communication module header.
the serial card slot with the 8-pin plug that mates to the
header on the communication module.
NOTE: This operation relies more on fitting the
communication module into the connector than
seeing the connectors mate.
5. 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).
6. When you feel the connectors align, press the
communication module into the connector. Verify that
the communication module is firmly connected
Step 3).
7. Replace the cover on the serial card slot. Slip the cover
over the network connector plug
8. Insert the network cable connector into the
communication module
www.DaikinApplied.com
(Figure 10
and
Figure
11):
Figure
12).
(Figure
9).
(Figure
Figure 7
shows
(Figure
(Figure
9).
(Figure 10
and
Figure
11):
a. Connect one wire of the network cable to Pin A of
the connector plug.
b. Connect the other wire to Pin B of the connector
plug. Note that no wire is connected to the GND
Pin.
Figure 10: Network Cable Routing and Connections
Figure 11: Network Connection Detail
4).
9. Attach the ferrite enclosure (optional - see
Figure 12: Ferrite Enclosure
8,
9
IM 735-4 • MICROTECH II CHILLER UNIT CONTROLLER
Installation
Pin A
Pin B
Network Cable
Figure
12).
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