Rockwell-automation 1771-CFM Config. Flowmeter Installation Instructio Manual de usuario descargar pdf (Pagina 11)

Configurable Flowmeter Module 11

Publication 1771ĆIN043B-EN-P - July 2002

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.

For additional grounding information,

see the Industrial Automation Wiring and

Grounding Guidelines,

publication 1770-4.1.

Ground the Module

Use the following diagrams to ground your

I/O chassis and CFM module.

foil shield

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

Twist the foil shield and drain

wire together to form a single strand.

Attach a ground lug.

20104

externalĆtooth

washers

#10 threadĆforming screw

19923

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.

19480

grounding stud

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.

Torque the nut with captive washer to 18(+

3) pound-inches.

ground lug

star

washer

I/O chassis

side plate

nut and captive

washer

shield and drain

twisted together

nut

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Rockwell-automation 1771-CFM Config. Flowmeter Installation Instructio Manual de usuario Pagina 11

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