Rockwell Automation 1503 OEM Starter Frame Components Installation Manual - Manual (Page 44)

3-10 Adjustments
1503-IN050E-EN-P – June 2013
Isolation Switch Auxiliary
Contacts (cont.)
4) Adjust the cam on the shaft so that the gap from the cam follower to
the end of the cam groove is the width of the pin — 0.25 in. (6.35 mm).
5) Move the isolation switch handle to the OFF (open) position and check
that nothing prevents the cam from rotating with the shaft.
6) Tighten the bolt holding the cam to the shaft. Move the isolation switch
handle to the ON position and recheck the gap using the pin.
7) Verity that auxiliary contact ISa is open when the isolation switch is
open. Verify that ISa contact is closed when isolation switch is closed.
Adjusting the Normally Closed (ISb) Contacts
1) Move the isolation switch handle to the OFF (open) position.
2) Loosen the bolt holding the inside cam to the shaft. Do not loosen the
bolt entirely. The cam should not be able to rotate freely on the shaft.
3) Insert a 0.25 in. (6.35 mm) diameter pin into the cam groove between
the cam follower and the end of the cam groove.
4) Adjust the cam on the shaft so that the gap from the cam follower to
the end of the cam groove is the width of the pin — 0.25 in. (6.35 mm).
5) Move the isolation switch handle to the ON (closed) position and
check that nothing prevents the cam from rotating with the shaft.
6) Tighten the bolt that holds the cam to the shaft. Move the isolation
switch handle to the OFF position and recheck the gap using the pin.
7) Operate the handle several times, then recheck the 0.25 in. (6.35 mm)
clearance between the end of the cam groove and the follower pin for
both cams.
8) Verify that auxiliary contact ISb is closed when isolation switch is
open. Verify that ISb contact is open when isolation switch is closed.