Rockwell Automation 1769-IT6 Compact I/O 1769-IT6 Thermocouple/mV Input Module - Manual (Page 34)

34 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010
Chapter 3 Installation and Wiring
Wire 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.
Follow these steps to wire your module.
1. At each end of the cable, strip some casing to expose the individual wires.
2. Trim the signal wires to 2 in. (5 cm) lengths.
3. Strip about 3/16 in. (5 mm) of insulation away to expose the end of the
wire.
4. At one end of the cable, twist the drain wire and foil shield together, bend
them away from the cable, apply shrink wrap, and then earth ground at the
preferred location based on the type of sensor you are using.
See Grounding Guidelines on page 31 .
5. At the other end of the cable, cut the drain wire and foil shield back to the
cable and apply shrink wrap.
6. Connect the signal wires to the terminal block. Connect the other end of
the cable to the analog input device.
7. Repeat steps 1…5 for each channel on the module.
ATTENTION: 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.
ATTENTION: Be careful when stripping wires. Wire fragments
that fall into a module could cause damage at powerup.
TIP See Appendix D , Using Thermocouple Junctions, for additional
information on wiring grounded, ungrounded, and exposed
thermocouple types.
Cable
Signal Wire
Signal Wire
Drain Wire Foil Shield Signal Wire Signal Wire
Cut foil shield
and drain wire.