6 Chromalox 2104 Technical Manual
Good Wiring Practices
1. When planning the system wiring, separate wiring
into functionally similar bundles - i.e., power leads,
sensor leads, output signal lines, etc. If the power leads
and sensor leads must cross, they should cross at a 90°
angle to each other (perpendicular).
2. Locate all sources of electrical noise in your system,
and separate these sources from the control systems—
motors, contacts, solenoids, etc. Electrical noise can
affect the function of any control system. When
driving a contactor coil or other inductive load, an
appropriately rated AC snubber circuit is
recommended (Chromalox Part. No. 0149-01305), as
described on page 11, “Relay Output Wiring.”
3. For sensor wiring practices, see Sensor Wiring
Notes, next page.
4. Additional information on good wiring practices is
available from IEEE, 345 East 47th St., NY, NY
10017. Request IEEE Standard No. 518-1982.
Wiring
Instructions
Make all electrical wiring connections to the back of
the controller before power is applied to the unit.
All wiring must comply with local codes, regulations
and ordinances. This instrument is intended for panel
mounting and the terminals must be enclosed within
a panel. Use National Electric Code (NEC) Class 1
wiring for all terminals except the sensor terminals.
Check the wiring decal on the side of the unit to
verify the model number. The wiring decal shows the
wiring terminations. All wires will be connected to the
terminals on the back of the instrument case. Specific
wiring instructions for different input and output types
are given in this section.
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