Installation of limit switches in distribution boxes

This guide covers everything you need to know to select, wire, and maintain a limit switch box correctly: the four sensor types, the right IP rating for your installation environment, step-by-step wiring configurations for PLC and field panel applications, cam adjustment. This guide covers everything you need to know to select, wire, and maintain a limit switch box correctly: the four sensor types, the right IP rating for your installation environment, step-by-step wiring configurations for PLC and field panel applications, cam adjustment. 2. 1 Purpose This installation and operating manual explains how to install, operate, and maintain limit switch boxes. PROVAL A250 Series limit switch boxes are used on rotary valve actuators to generate open/close signals and monitor the valve position. Metal is near one side of head. Electrical connections are duly numbered and s wn in sketch pasted on the cover.