Andover Controls SCX 920 Installation Manual page 28

Caution
Although inputs usually function properly with unshielded sensor wire,
you may need shielded wire if you run the wire as follows:
• In the same conduit with other noise-generating conductors such as
• In long runs close to large power-consuming or power-generating
We recommend you run input wiring in a conduit separate from AC
power or output wiring and avoid long wiring runs.
Caution
Follow the rules below when wiring inputs and outputs:
• Never lay wires across the surface of the printed circuit board. You
• Bundle excess wires toward the back of the cabinet to avoid any
• Wires should never be within 1 in. of any component on the printed
• Keep cabinet free of foreign materials (extra power supplies, relays,
• Be careful when stripping wire not to drop small pieces of wire
If you violate any of these rules, the controller could malfunction.
Caution
Never apply a voltage to a thermistor. Doing so alters the thermistor's
accuracy and reliability. You should replace a thermistor that has had
voltage applied to it. Never bring a soldering iron to within 3 inches of
the thermistor's sensing tip.
20
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60 Hz AC power.
equipment that can produce 60 Hz noise.
should bring input wires in from the left and output wires in from the
right.
contact with circuit boards.
circuit board.
and so on).
inside the cabinet.
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Hardware Installation
SCX 920 Installation Guide