TTL Output Module
Cat. No. 1771OG
Installation Instructions
5
3.
Separate the shielded cables from wiring that radiates electrical noise.
Refer to category 2, low power dc I/O lines, in publication 1770-4.1,
‘‘Programmable Controller Wiring and Grounding Guidelines”.
4.
Prepare the cable for grounding by doing the following:
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
5.
Ground the single strand (at the ground lug end) to the grounding
stud on the I/O chassis or by using single-point grounding.
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 crimpon lugs are not used.
Chassis Ground
Singlepoint Grounding
Ground Lug
Nut
Ground Lug
1
Star
Washer
I/O Chassis Side Plate
Nut and Captive
Washer
Externaltooth Washers
#10 Threadforming screw
19923