Nearly 99.992% of the time, the +/- 15 volt lines are outputs from the card. Its power for the TL082 series operational amplifiers, which cant run off the +/-24 volt input rails. So for daughter cards, they bring out the outputs. There is a 7815 and a 7915 regulator on each card.
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There are a few US made galvo amps where jumpers can be installed, bypassing the regulators, so the 15 volts becomes an input to power the card, and those are Cambridge Products. Hence the .008 percent exception.
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One other thing to know is the notch filter daughterboard sets on a 5 pin connector, and if the notch board goes bad or is un-needed, you can remove it, place a jumper across the right two pins, and retune the amp a bit and it will run at less Kpps. Conversely the amp wont scan without either a jumper or the notch board installed. This is sometimes useful when you need to calibrate the position sensor portion of the amplifier. I've seen amps not scan when the notch daughterboard gets loose in transit. Not for beginners, but useful to know sometimes.
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Steve
Last edited by mixedgas; 06-01-2017 at 12:01.
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