Hand Off Auto Switch Contacts

Select an operator prefix from table 1 on page 9.

Hand off auto switch contacts. Draw and label the nema sybols for both a two position off on selector switch and a three position hand off auto selector switch. Select a cam and index code from table 2 on page 9. In hand the motor would run continuously and in auto the motor would start and stop by a plc or other controller. Code kc1 or kc7 would be equally effective.

Identify the following switch symbol. M short style operators are suitable for class i group c d class ii group e f g only. A combination push button station with a hand off automatic switch and pilot lamp is shown in figure 27 3. In stock and ready to ship.

The switch is a three position switch that can be used to manually change the direction of rotation of a three phase motor. 2 position marked off on and blank on other side. Consider a second example. 3 position marked hand off auto and blank on other side.

The included legend plate establishes two selections for activating a process and one to turn off all functions. Learn how this truth table illustrates the manual or automatic contact po. Xo x oox xo o 1. A switch contact which changes states when actuated but returns to its initial state when the actuation is removed is called a operator.

Contact hand off auto legend plate. A typical hand off auto control operation typically requires a how many position selector switch with how many contacts. Black selector switch attached to a mounting base 1 n o. Choose from our selection of hand off auto switches including metal 30 mm panel mount lever switches steel enclosed lever switches and more.

L contact blocks are shown in their normal position. Select a maintained 3 position hand off auto selector switch with standard knob and three circuits as shown. The flow switch shown in figure 27 2 employs two separate contacts one normally open and the other normally closed. Selector switch 3 position 30mm knob maintained nema 4 13 selector switch 3 position 30mm knob black with white insert kb7 cam 1 normally open 1 normally closed contact blocks nema 4 13 available in select areas.

Oil tight watertight and dust proof. Use kc1 for this example. In hand the valve can be jogged open or close right at the switch. Contact position on a selector switch can easily be illustrated using truth tables.