Rockwell Automation Publication 750-TG100B-EN-P - June 2019 189
Input Bay Components Chapter 8
Install the AC Precharge Control Circuit Board
Install the AC precharge control circuit board in the reverse order of removal.
When installing the fiber-optic cable:
1. Remove the transceiver from the fiber-optic connector port on the circuit
board.
2. Without bending the cable to a radius less than 50 mm (2 in.), fully insert
the fiber-optic cable into the transceiver.
3. Insert the transceiver and fiber-optic cable into the port on the board, until
you hear an audible ‘click.
AC Precharge Time Delay
Relay Replacement
Replace the AC precharge time delay relay with kit catalog number
20-750-MACPC-TDR.
Remove the AC Precharge Time Delay Relay
Follow these steps to remove and replace the AC precharge time delay relay.
1. Review the Product Advisories on page 14
.
2. Remove power from the system. See Remove Power from the System on
page 15
.
3. Open the input bay enclosure door.
4. Remove the guard from the enclosure. See Guard Removal on page 183
.
5. Disconnect the wires from top terminals on the time delay relay.
IMPORTANT
Minimum inside bend radius for fiber-optic cable is 50 mm
(2 in.). Any bends with a shorter inside radius can
permanently damage the fiber-optic cable. Signal
attenuation increases as inside bend radius is decreased.
IMPORTANT Verify that the two pins on the back of the AC precharge module chassis are
properly inserted into the two holes on the circuit board panel before
tightening the panel mounting screws.
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