Spectrum Controls 1769sc-IT6I - Manual (Page 31)

Chapter 3: Installation and Wiring 3-11
User’s Manual Pub. 0300244-01 Rev. A
3.7.5 Wiring the Module
To prevent shock hazard, care should be taken when wiring the module
to analog signal sources. Before wiring any module, disconnect power
from the system power supply and from any other source to the module.
After the module is properly installed, follow the wiring procedure below, using the
proper thermocouple extension cable, or Belden 8761 for non-thermocouple applications.
To wire your module follow these steps.
1) At each end of the cable, strip some casing to expose the individual wires.
2) Trim the signal wires to 2-inch (5 cm) lengths. Strip about 3/16 inch (5 mm) of
insulation away to expose the end of the wire.
Be careful when stripping wires. Wire fragments that fall into a module
could cause damage at power up.
3) At one end of the cable, twist the drain wire and foil shield together, bend them
away from the cable, and apply shrink wrap. Then earth ground at the preferred
location based on the type of sensor you are using. See Grounding on page 3-8.
4) At the other end of the cable, cut the drain wire and foil shield back to the cable
and apply shrink wrap.
5) Connect the signal wires to the terminal block. Connect the other end of the
cable to the analog input device.
6) Repeat steps 1 through 5 for each channel on the module.
Note: See Appendix B Using Thermocouple Junctions for additional information on
wiring grounded, ungrounded, and exposed thermocouple types.
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Attention
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Attention