Limit Switch Draws Tears

[Mike Betts]

Originally Posted by gokul

...Make sure your switch itself is a normally Open type switch Switches come as Normally Open and Normally Closed - closed will always show one unless it is operated in a different way...

Not true. "Normally" only reflects the position of the contacts when the switch is not pressed. A NO switch will close when pressed, a NC switch will open.

There are many times when you want a NC switch. This is particularly true of limit switches. If a wire breaks and the switch is no longer "in the circuit" you want the motor or actuator that you are limiting to stop. This is usually much safer...

Regards,

Mike

[Alan Anderson]

Originally Posted by z2daj

We have wired the two limit switch wires into to the ground and signal connections on input four of the digital sidecar.

Have you verified that the switch works? How?

What are you using as a limit switch? The microswitches I'm familiar with have three connections.