Ametek Thermox CEM O2/TM, User Manual

Page: 35 / 168

Installation
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3-13
Wiring
Remove AC mains power from the controller and sensor before per-
forming wiring.
Connections to the control unit are made through the wiring card (see
Figure 3-14). The wiring card is located on the front, bottom of the control
unit for all weatherproof versions and for the general purpose wall mount
version (see the “Control Unit Mounting” Section earlier in this chapter
for help). For the general purpose rack and panel mount versions, the wir-
ing card is located on the rear of the control unit (Figure 3-14 shows the
orientation of the wiring card for general purpose rack and panel mount
versions - for all other versions, the wiring card is 180 degrees from this
view).
To access the wiring card for all general purpose versions of the control
unit, unscrew the four screws on the wiring card chassis cover plate. For
the weatherproof versions of the control unit, first open the front door of
the weatherproof enclosure to gain access to the wiring card shield. Re-
move the three screws on this shield to gain access to the wiring card.
Any screw terminals on the wiring card not described in this section
are reserved for future use.
Figure 3-14.
Wiring Card (rack/panel
mount orientation).
NOTE
