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Unread 22-02-2010, 20:12
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AKA: Ryan Nazaretian
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Re: How to wire Air Compressor's spike relay?

Quote:
Originally Posted by mr_yes View Post
I'm probably the last person to answer this question, so my answer carries all the authority of "something I read on the Internet". But I do have a source: http://robotics.hideho.org/data/firs...Controller.pdf on page 16 states, "The Solenoid Breakout
● Has 8 solenoid outputs.
● Completely eliminates the need for Spikes for pneumatics.
● Can drive 12 Volts at up to 0.75 Amps per output."

So you might not need to use a Spike.
Not quite...

You do have to use a Spike relay for the compressor. The compressor is rated around 20A, so you will need to hook it up to the Spike. GND and 12V are the input lines that go directly to the power distribution board. Use 18AWG wire (preferably 14AWG to handle the compressor startup better). Plug in a 20A breaker into the power distro board, and take out the yellow fuse and replace it with a 20A breaker. Trust me, you'll thank me for that tip.

The compressor hooks directly to the M- and M+ leads just the way you would think. Red goes to M+, Black goes to M-...

Hook a PWM cable to the Spike and plug it into the sidecar. Take note of where you plug it into so you can use it in your programming. There are outputs on the sidecar labeled as Relay. The black end of the PWM cable goes where it says (-) and the red goes on the center, and the white goes where it says A.

If you try to run the compressor with the way mr_yes described, you will burn something up, and it won't be the compressor (yea, it will be something much worse so do not wire it that way).
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