Rockwell-automation 1771-A2BSS_A3B1SS Install Instruc Universal I/O Ch Manual de usuario descargar pdf (Pagina 4)

Universal I/O Chassis4

Publication

1771–5.60 – May 1999

If you have this I/O chassis Type of mount

1771-A2BSS panel mount (rear mount)

1771-A3B1SS panel mount (rear mount)

Each enclosure must contain a central ground bus. The ground bus

is the common connection for each chassis within the enclosure and

the enclosure itself. Use either bolts or welded studs to mount the

I/O chassis and central ground bus. If you are mounting a chassis to

the back panel of an enclosure, use 1/4-20 (M6 x 10) mounting bolts.

17666

back-panel

back

wall of enclosure

welded

stud

Use

a wire brush to remove

paint from threads to

provide a ground connection.

star washer

nut

ground bus or

mounting bracket

back-panel

tapped hole

bolt

star washer

flat washer

star washer

17665

nut

ground lug

17664

mounting bracket

or ground bus

back wall of enclosure

welded stud

flat washer

flat

washer

star washer

nut

ground lug

Stud Mounting of the Back-panel to the Back Wall of the Enclousure Bolt Mounting of a Ground Bus or Chassis to the Back-panel

Stud Mounting of a Ground Bus or Chassis to the Back-panel

scrape

paint on panel

scrape

paint on panel

scrape

paint from mounting

bracket or ground bus

scrape

paint from threads

ATTENTION: If the mounting brackets of a chassis

do not lay flat before the nuts are tightened, use

additional washers as shims so that the chassis will not

be warped by tightening the nuts. Warping a chassis

could damage the backplane and cause poor

connections.

Mount the I/O Chassis

and Ground Bus

1 2 3 4 5 6 7 8 9 10 11 12

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Rockwell-automation 1771-A2BSS_A3B1SS Install Instruc Universal I/O Ch Manual de usuario Pagina 4

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