Rockwell Automation 1512A MV Controllers - 800A One-High Cabinet - Manual (Page 65)

Maintenance 5-17
1512A-UM102B-EN-P – June 2013
To avoid shock hazard, lock out incoming power (see
page 5-3) 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.
1) Complete the Power Lockout Procedure (see page 5-3).
2) 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.
3) To remove the contact, turn both of the D-head fasteners until the
flat sections are aligned with the edge of the contact (See Figure 5.14).
4) Remove the contact from the housing.
5) Disconnect the wires from the auxiliary contact.
6) Reverse the procedure to replace the auxiliary contact.
7) Ensure the contact is correctly positioned into the contact carrier
(See Figure 5.14).
Figure 5.15 – Auxiliary Contact Orientation
A T T E N T I O N A T T E N T I O N
Auxiliary Contacts
Inspection and Replacement