Rockwell Automation Publication 1512A-UM101B-EN-P - December 2021
65
Chapter 5 Maintenance
Auxiliary Contacts
Inspection and
Replacement
1. Inspect the auxiliary contacts for wear, scorching, or heat damage.
Replace any damaged contacts. The contacts have a mean time between
failure (MTBF) rating of 20 million operations if used within the
operating specifications.
2. To remove the contact, turn both of the D-head fasteners until the flat
sections are aligned with the edge of the contact (See
3. Remove the contact from the housing.
4. Disconnect the wires from the auxiliary contact.
5. Reverse the procedure to replace the auxiliary contact.
6. Verify the contact is correctly positioned into the contact carrier (see
).
Figure 53 - Auxiliary Contact Orientation
Auxiliary Contacts
Adjustment
The auxiliary contacts are mounted on the left side of the isolation switch,
slightly below the cams on the isolation switch shaft.
Normally open contacts (Isolation Switch a Contacts - ISa) are on the outside
of the isolation switch housing, and normally closed contacts (Isolation Switch
b Contacts - ISb) are on the inside of the housing.
ATTENTION:
To avoid shock hazard, 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.
CATALOG NO.
700-CPM
SER. A
20
AMP
CATA
LOG NO.
700-CPM
SER. A
20
AMP
CATALOG NO.
700-CPM
SER. A
20
AMP
CATALOG NO.
700-CPM
SER. A
20
AMP
CATA
LOG NO.
700-CPM
SER. A
20
AMP
CATA
LOG NO.
700-CPM
SER. A
20
AMP
D-head Fastener
Correct
Incorrect
