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.
Hand off auto switch contacts.
3 position marked hand off auto and blank on other side.
Contact position on a selector switch can easily be illustrated using truth tables.
Contact hand off auto legend plate.
A combination push button station with a hand off automatic switch and pilot lamp is shown in figure 27 3.
4 position is blank.
Learn how this truth table illustrates the manual or automatic contact po.
Xo x oox xo o 1.
Use kc1 for this example.
Select an operator prefix from table 1 on page 9.
In hand the valve can be jogged open or close right at the switch.
A modulating valve has a control switch labeled hand off auto located near the valve.
The flow switch shown in figure 27 2 employs two separate contacts one normally open and the other normally closed.
M short style operators are suitable for class i group c d class ii group e f g only.
Select a cam and index code from table 2 on page 9.
L contact blocks are shown in their normal position.
Oil tight watertight and dust proof.
A switch contact which changes states when actuated but returns to its initial state when the actuation is removed is called a operator.
Consider a second example.
In stock and ready to ship.
Code kc1 or kc7 would be equally effective.
Heavy duty selector switch for industrial applications.
Identify the following switch symbol.
Draw and label the nema sybols for both a two position off on selector switch and a three position hand off auto selector switch.
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.
Choose from our selection of hand off auto switches including metal 30 mm panel mount lever switches steel enclosed lever switches and more.
In hand the motor would run continuously and in auto the motor would start and stop by a plc or other controller.
The included legend plate establishes two selections for activating a process and one to turn off all functions.
