Plug-in Housings
Plug-in housings were developed to ease replacement of the switch if needed. In contrast to the box-and-cover concept, the plug-in housing splits in half to allow access to the terminal block for wiring. A set of stabs in the switch body “plugs” into sockets in the base to make electrical connections between the contact block and the terminal block.
The base of the plug-in houses the electrical wiring and is mounted at the initial installation. With no moving parts to break or wear, the base rarely needs to be replaced. If the switch is damaged or wears out, the switch body with head is removed, a new switch body with head is plugged into the base, and the switch is ready for operation. No rewiring is needed.
An O-ring provides the seal between the operating head and the switch cover while a custom-cut gasket guards the switch body against entry of oil, dust, water, and coolants.
Plug-in Housing
Article source form :
Rockwell Automation/Allen-Bradley
Training Manual
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