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Everything posted by PaulKraemer

  1. Thanks Ed, That was a big help. Just to make sure I understand correctly, whey you say... DPST - Just two independent switches like SPST. ...By "independent', you mean that you can switch two separate circuits ON or OFF. They are still controlled by just one controlling coil, right? So, the two circuits are either both ON or both OFF, right? Please excuse my ignorance. I am sort of new to this stuff. Thanks again, Paul
  2. Hi From what I understand, a relay has a control circuit and a power circuit. If you energize the control circuit, the power circuit is closed. I have seen relays advertised as single-pole single-throw (SPST), single-pole double-throw (SPDT), double-pole single-throw (DPST), and double-pole double-throw (DPDT). I am not familiar with these terms. I was wondering if anyone could give me an explanation, or point me towards something I can read to learn more. Thanks, Paul
  3. ???Hi, I work in the industrial automation industry, but I do not have a strong electronics background. Alot of devices I am forced to deal with (drives, tension controllers, temperature controllers) have discrete inputs that you can use to tell the device to perform some action (start, stop, enable, etc.) I've read alot of manuals for these devices, and most of them use either the word "sink" or "source" in the description of these inputs. I do not have a great understanding of these terms. I was wondering if someone could give me an explanation in laymans terms, or point me towards anything I can read that may have a good explanation. Thanks, Paul
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