Standard Wiring for M8 and M12 Connectors?

I haven't come across any standards.

We use the Phoenix Contact sensor/actuator boxes & connectors.

The 4-pin types have pins 1,3,4 and 5 with power on 1, 0V on 3, signal on 4 and ground on 5. (Note: no pin 2 - how logical is that?).

The 5-pin types have pins 1 to 5, with the same connections as above and a second signal connection on 2.

Edit - I've just found this:

http://www.erni.com/fileadmin/medien/downloadcenter/m8m12/ERNI-M8M12-e.pdf

which may help.

Hi, thanks for the info, Did you see something specifically interesting in that doc?

I had seen it before but did not see anything that really applied. Maybe i missed what you are seeing?

Thanks in advance

I was a bit rushed at work. Saw the table of standard layouts but didn’t have time to check for standard pin assignments - posted it just in case.

ok thanks

Yea i did not see a standard pin assignment either

There is a semi-standard based on European color codes. A large majority of M12 cables, and instruments connected via M12 receptacles, have brown on pin 1, which is +V, white on pin 2 which is signal, blue on pin 3 which is voltage common, black on pin 4, which can be a second signal, for instance the opposite signal of white in a DP relay output, or an analog output if the white is a discrete one, or what ever, and grey on pin 5, and this is also a "whatever". A majority of the instruments and cables we use on our process skids follow this pattern. That said, I know the first time you try to use this, you'll find a cable or instrument that is different. Definitely most bus system cables are going to violate this. However it is a good guide to start with.

Thanks guys