Grounding – Rockwell Automation 1771-IFE , D17716.5.90 USER MNL. ANALOG INPUT Module User Manual

Page 20

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Installing the Input Module

Chapter 2

2-8

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
(Figure 2.6). At the opposite end of the cable, tape exposed shield and
drain wire with electrical tape to insulate it from electrical contact.

Figure 2.6

Cable Grounding

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.

20104

Belden 8761 Cable

19480

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.

Grounding Stud

1

Use the cup washer if crimpĆon lugs are not used.

Chassis Ground

SingleĆpoint Grounding

Ground Lug

Nut

Ground Lug

1

Star

Washer

I/O Chassis Side Plate

Nut and Captive

Washer

ExternalĆtooth Washers

#10 ThreadĆforming screw

19923

Shield and Drain

twisted together

Shield and Drain

twisted together

Refer to Wiring and Grounding Guidelines, publication 1770Ć4.1 for additional information.

Grounding

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