AR-180 Interlock Unit Installation

The AR-180 Interlock Unit works on MC185a ~ 400a contactors. this interlock is used for reversing contactor arrangements.

To install this option the inner auxiliary contact should be removed. Additionally, the circular knockouts need to be removed. this can be accomplished with a screwdriver and small hammer.

Remove the 2 screws and knockout the circular plastic knockouts.

This picture shows the AUX and knockouts removed.

The interlock unit will now slide into place between the 2 contactors.