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Xi Advanced Electronics
6-8
Instruction Manual
IM-106-910Xi, Original Issue
November 2010
AC Relay Board
Replacement
Use the procedure that follows to replace and set up the AC Relay board in
the Xi.
Replacing an Existing AC ReIay Board
1. Loosen the four screws securing the Xi cover. The screws are captive
and do not need to be completely removed.
2. Swing the Xi cover down to expose the inner components.
3. Tag and disconnect wiring for the Relay In.
4. Slide the AC Relay Board part way out of the Xi enclosure.
5. Tag and disconnect the two 3-position plugs for the AC input and
transmitter probe heater wiring. Remove the AC Relay Board
completely from the Xi enclosure.
6. Partially slide the new AC Relay Board into the Xi enclosure. Ensure the
board is correctly aligned within the slots in the enclosure.
7. Connect the two 3-position plugs for the AC input and transmitter probe
heater wiring. Slide the AC Relay Board fully into the Xi enclosure.
Figure 6-7. I/O & AC Relay Board Flame Safety Interlock Wiring
Disconnect and lock out power before working on any electrical components.