Rockwell Automation 1512B MV Controllers, 200/400A Two-High Cabinet, Standard and Arc-Resistant Enclosure - Manual (Page 73)

Rockwell Automation Publication 1500-UM055G-EN-P - May 2013 65
Maintenance Chapter 5
4. Insert a 6.35 mm (0.25 in.) diameter pin into the cam groove between the
cam follower and the end of the cam groove.
Figure 66 - Adjusting Auxiliary Contacts (ISa Auxiliary Contact Shown)
5. 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 – 6.35 mm (0.25 in.).
6. Move the isolation switch handle to the OFF (open) position and check
that nothing prevents the cam from rotating with the shaft.
7. 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.
8. Verify 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 6.35 mm (0.25 in.) 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 — 6.35 mm (0.25 in.).
5. 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.
CATA LO G NO .
700-CPM SER. A
20 AMP
Cam
Cam Follower
Auxiliary Contact
Gap: 0.25 in. (6.35 mm)