Limit Switch Working Principle - your electrical guide When striker reaches near REV limit switch, it strikes with limit switch and. R 2 opens, de-energies contactor A, the motor stops. R 1 closes, energies contactor B, the motor starts rotating in reverse direction. Similarly, when striker reaches near FWD limit switch, it strikes with FWD limit switch and. F 2 opens, de-energies contactor B, the motor stops.
Related with motor circuit diagram with limit switches