IronBridgeBrewery

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P-J,

You have done more then you realize, my control panel is 98% your wiring design, just a few small modifications.

I certainly apreciate all you and everyone else does here!

~jake

TriangleIL

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Resurrecting another thread to ask a question on 3 position selector switches.

When a NO contactor is placed under the left side position, that contactor makes a complete circuit when the switch is in the left side position? The NO contactor is opened at all other times (center position and right position)?

When a NC contactor is placed under the left side position, that contactor is not a complete circuit when the switch is in the left side position? The NC contactor is closed at all other times (center position and right position)?

So in theory, if I want to make the center "Off" position, be an "On" position, I would wirte a NC contactor in series from left position to right position? That way, when the switch is on the left or right side, one of the contactors is opened and the circuit is incomplete. When the switch is in the center position they are both closed and the circuit is complete?

Is my theory here correct? Basically, my goal is to use this switch to control "Valve1", "Auto" and "Valve2", where "Auto" is my center position and a Microcontroller will determine which of Valve1 or Valve2 will be opened. So I will use 4 NC contactors, and put my lines from Microcontroller to each valve through 2 of those NC contactors, one on each side.

Thanks! Sorry for the long winded post. I want to make sure to get this right before placing my order for contactors.

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My Ditches Build

bdjohns1

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Depends on the maker of the switch. I got one from Siemens where the contact actuator on the operator is straight-through. If you look at it from the front, when you turn the switch left, it moves the actuator on the left side. I looked at an Allen-Bradley one at work, and it's the same. I got one from AutomationDirect, and it's the opposite.

Your basic idea sounds reasonable - you'd just need to visually verify which way the actuators go.

P-J

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Correct? You can bet on it. And the way you have it sorted out and described - It's right on the money. No theory involved.

Good job.

P-J