Rockwell Automation 1771-IL INSTL.INSTR.ISOL ANALOG INPUT - Manual (Page 7)

Isolated Analog Input Module 7
Publication 1771Ć5.51 - October 1996
Ground the Chassis and Module
Use the following diagrams to ground your
I/O chassis and isolated analog input module.
Follow these steps to prepare the cable:
Refer to Wiring and Grounding Guidelines,
publication 1770-4.1 for additional
information.
Remove a length of cable
jacket from the Belden 8761 cable.
Pull the foil shield and bare
drain wire from the insulated wires.
Bare drain
wire
Insulated
wires
Foil
shield
Twist the foil shield and drain
wire together to form a single strand.
Attach a ground lug.
Belden 8761 Cable
2
When using shielded cable wire, ground the foil
shield and drain wire only at one end of the cable.
We recommend that you wrap the foil shield and
drain wire together and connect them to a chassis
mounting bolt.
At the opposite end of the cable, tape exposed
shield and drain wire with electrical tape to insulate
it from electrical contact.
1
3
4
ExternalĆtooth
Washers
#10 ThreadĆforming screw
Shield and Drain
twisted together
SingleĆpoint Grounding
Extend shield to termination point.
Expose just enough cable to adequately
terminate inner conductors.
Use heat shrink tubing
or other suitable
insulation where wire
exits cable jacket.
Grounding Stud
1 Use the cup washer if crimpĆon lugs are not used.
Chassis Ground
When you connect grounding conductors to the I/O chassis
grounding stud, place a star washer under the first lug, then
place a nut with captive lock washer on top of each ground lug.
Ground Lug
Ground Lug 1
Star
Washer
I/O Chassis
Side Plate
Nut and Captive
Washer
Shield and Drain
twisted together
Nut