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Old 01-27-2011, 09:14 PM
jankovig jankovig is offline
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This is my first post and I hope it's going to be a helpful one...I'm an electrical engineer and I hope I can be of help to some of you guys.
Oscaryu1, the picture of the solenoid in the ebay link you posted looks exactly like the Cole Hersee made solenoid that I see almost every day in my line of work.

Here's the linke to their product catalog
http://www.colehersee.com/catalog_top/index.htm

Here's what the solenoid looks like inside...
http://www.colehersee.com/pdf/soleno...080%20type.gif

Terminals 2 and 3 refer to the coil of the terminal, which could be 12V or 24V. Polarity is only important if you plan on connecting a suppression diode (highly recommended). You must connect the positive to the cathode (side of the diode with a silver band around it). When terminals 2 and 3 are energized, contact (the upside-down T) is pulled up connecting terminals 1 and 4. I hope this clears it up for you.