Re: [CAD_CAM_EDM_DRO] Gecko power requirements

From: "Doug Fortune" <pentam@...>

> To quote from the manual (G210 & G340):
>
> -------------
> INPUT OPTION HEADER
>
> The INPUT OPTION HEADER allows the STEP and DIRECTION
> optio-isolators to be configured as either common ground
> or common +5V DC.

This is the beginning of the connundrum.
I understand "common ground", but what is "common +5V DC"?

> If the G210/G340 inputs are driven by a source that has
> only ground available, such as a PC parallel port, move
> the 4 jumpers on the header so that it looks like the
> COMMON GROUND seeting. Connect the input driver ground
> to TERM 12 on the main connector.

That part is where it starts to get really muddy...

> If the G210/G340 inputs are driven by open collector
> transistors or standard TTL gates, move the 4 jumpers
> on the header so that it looks like the COMMON +5V DC
> setting.

Yep, that's the one.
No matter how hard I squint, this part just looks like Chinese to me.
Open collector transistors, standard TTL gates,
and that damned COMMON +5V DC thing again.
Might as well have been lions and tigers and bears, oh my~!
Sorry, lost me.

Remember, I'ma idjit.

Weyland