G540 Low voltage for E-stop and limits?

[MrWild]

Will the G540 work using a low voltage source (5v wall wart or 7805 circuit) for less contact arc? I can lower the amps with a low amp fuse, but the 48v of my supply seems high. I "feel" safer with low volts in the control circuit.

If the G540 can do this with a low voltage, I know I'd need to connect the negative to the supply/selinoid negative star hook up point. Or am I just being too cautious?

[resistor]

MrWild,
Hope i understood your questions correctly.
Please refer to the latest G540 manual .pdf at:
http://www.geckodrive.com/upload/G54...3%20MANUAL.pdf
There is a really helpful diagram on the last page.

G540 Low voltage for E-stop and limits?

Inputs 1 through 4 are generally wired to NC (normally closed) switches,
C (common) side of the switch wired to the respected input on the G540 terminal.
NC (normally closed side of the switch wired to the common system ground.
There is no other voltage applied to the switches.

(5v wall wart or 7805 circuit) for less contact arc?

The power supply for the output are generally used to drive external relays.
The power supply for these outputs is determined by the requirement of the relays.
( each output is able to sink a maximum of 1A at 50VDC )
So if using relays with 5VDC coils (less than 1A coils) the 5v wall wart would work well.
res out

[MrWild]

Inputs 1 through 4 are generally wired to NC (normally closed) switches,
C (common) side of the switch wired to the respected input on the G540 terminal.
NC (normally closed side of the switch wired to the common system ground.
There is no other voltage applied to the switches.

Okay, now I feel like a bone head. I'm actually laughing because it is obvious isn't it. While the power supply voltage goes into the G540, the G540 doesn't put out that power and current to the limits and e-stop. I'm usually more on the ball than this, I guess I don't need to fuse the limit switches or E-stop either now. Don't ask me why I was thinking the limits were self powered. I think I'll give it a day then erase this thread out of embarrassement. I have a copy of the latest manual, just did a brain fade is all.

[resistor]

Ok...

Don't ask me why I was thinking the limits were self powered.

IF you don't ask
how i know for a fact that if you use motor voltage for 5VDC relays
it creates very brief exciting but undesirable results.
res out

[TOTALLYRC]

On page 5002 it states 1 caffenated drink before hand will make the thinking go much faster. LOL LOL .It was a honest oversite. That is why this forum exists for everybody to hepl everybody else. And to geive me a place to practice my typing.

Mike.