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Rockwell Automation Publication 1512A-UM101B-EN-P - December 2021
Chapter 5 Maintenance
Figure 54 - Location of ISa and ISb Auxiliary Contacts
ISa and ISb contacts are exactly the same (700 CPM). The cam controls the
normally open or normally closed status of the contacts.
Refer to
Adjusting the Normally Open (ISa) Contacts
1. Move the isolation switch handle to the OFF (open) position.
2. Loosen the bolt holding the outside cam to the shaft. Do not loosen the
bolt entirely. The cam should not be able to rotate freely on the shaft.
3. Move the isolation switch handles to the ON (closed) position and check
that nothing prevents cam from rotating with the shaft.
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.
ISa Auxiliary
Contacts (N.O.)
ISb Auxiliary Contacts (N.C.)
IMPORTANT
The Isolation Switch Ground Adjustment procedure (refer
Isolation Switch Mechanism Grounding Adjustment on page 64
)
must be completed before adjusting the auxiliary contacts to
ensure proper synchronization of the assembly.
ATTENTION:
To avoid shock hazards, lock out incoming power (refer
Power Lock-out Procedure on page 49
) before working on the
equipment. Verify with a hot stick or appropriate voltage measuring
device that all circuits are voltage free. Failure to do so may result in
severe burns, injury, or death.
