Hazardous Area
X-STREAM O
2
Transmitter
6-26
Instruction Manual
IM-106-910C, Rev. 1.0
November 2009
Figure 6-21. I/O and AC Relay
Board Position in Xi Enclosure
8. Connect two wires approximately 6" long each between the "HTR COM"
and the "HTR NC" connections on the I/O Board and the "RELAY IN"
connections on the AC Relay Board; observe polarity. See Figure 6-20
for wiring details.
9. Connect the flame status indicator contact to the "DI+" and "DI-" on the
AC Relay Board. See Figure 6-20 for wiring details.
10. Connect the AC input and output wiring to the Transmitter. See
Figure 6-20 for wiring details.
11. Slide the AC Relay Board completely into the Xi enclosure.
12. Swing the cover up in place and tighten the four screws.
Power Supply Board
Replacement
Use the procedure that follows to replace the Power Supply board in the Xi
Enhanced Interface. Use this procedure to replace an original Linear Power
Supply board or the current configuration Switching Power Supply 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. Refer to the wiring diagram in Figure 6-22. Unplug the AC input wiring
plug from the Power Supply board. A new plug is supplied in the
replacement kit and should be used if the existing plug is damaged.
4. Disconnect the 14-pin ribbon cable from the Power Supply board.
5. Remove the two long screws that secure the bracket (9, Figure 6-14) to
the Xi enclosure.
Disconnect and lock out power before working on any electrical components.
