[?]: WAGO 750-920 Communications Cable pinout/signal levels

[Velund]

Hello everyone!

I'm looking for any information concerning WAGO 750-920 Communications Cable - schematic or pinout + signal levels would be ideal (plan to build one).

Just got 750-816 unit with a handful of i/o modules from some dismantled equipment and like to use it to advance my PLC programming skills litle bit.

BTW: Is it the same cable as used with Beckhoff KS-2000 software?

[lonzo]

hello,
it is nearly the same cabel as beckhoff.

[Velund]

hello,
it is nearly the same cabel as beckhoff.

Glad to hear this... But does anyone know enough about it to be able to build one from junkbox parts?

My junkbox is pretty rich, of course, I can pull something starting from vintage military low inductance high power RF load resistor (with berillium oxide warning sign on top, brrr) to modern ARM-based microcontroller from there. And for sure, there is a lot of various RS-232 buffer chips and connectors.

[Velund]

Well. It was easy. Figured it out using multimeter in a minutes, once opened PLC case and found microcontroller datasheet. Used handy RS-232-TTL converted board to build programming cable, works perfectly.

[gecoautomazione]

Can you please give us the pinout?
I suppose (from top to bottom) +5V, tx, rx, Gnd.
But i can't burn my fieldbus coupler trying...

Thanks,

GA

[Dennis2004]

Found another pinout in my old notes:

TOP
--TxD
--RxD
--+5VDC
--GND
BOTTOM

Signal levels are TTL (0VDC/5VDC).