Ametek CEM/Humox, User Manual

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3-8 | Thermox CEM/Humox Analyzer
Wiring
Remove AC mains power from the control unit and sensor before per-
forming any work.
Connections to the control unit are made through the wiring card (see Figure 3-9).
The wiring card is located on the front, bottom of the control unit for all weather-
proof 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 wiring card is located on the rear of the control
unit (Figure 3-9 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, un-
screw 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. Remove the three screws on this shield to
gain access to the wiring card.
Figure 3-9.
Wiring card (rack/panel
mount orientation).