Rotary Geared Limit Switch The LAWA Rotary gear type Limit switches are used on control / Power circuit of reversing drives so as to limit their rotation/movement within a predetermined position. The function of the Limit Switch is to stop the mechanism of drive at the extreme forward/reverse positions. The contacts of Lawa Limit Switches are 40 amps rated at 500 volts A.C. The Limit Switch can be provided with 2 NC contacts or 4 NC contacts or (2NO + 2NC) contacts as per the requirement.