Originally Posted by Jeff-Birt  Pins 5&6 provide the DC 'ground' (common) when that output is turned on. You need to have the +side hooked up to the other side of the relay. If you are using lower voltage relays you need to power them with a lower voltage supply as shown in the gecko docs.
To make it easier on folks using a single 48V supply I just started carry a 48VDC relay kit. It comes with the relay and terminals to hook it up.
http://cnczone.com/cncparts2.aspx |
So the G540 is only acting as a computer controlled switch in this particular circuit. It would have been nice for the G540 to also supply power to the relay as it has 5v available from the host computer and all it would need to do is route that power into that side of he switching operation. But then I know nothing about electronics so there must be a reason that this can't happen or they would have already incorporated it into the design of the G540.
Never the less, I'll order two new relays from your web sight. That seams the easiest route rather then having to install another power supply just to deal with the relays.
Thanks Jeff
Regards
John