M124pinout

This sub is dedicated to discussion and questions about Programmable Logic Controllers (PLCs): "an industrial digital computer that has been ruggedized and adapted for the control of manufacturing processes, such as assembly lines, robotic devices, or any activity that requires high reliability, ease of programming, and process fault diagnosis."

M125 pinpinout

Is this a standard? I'm running into a vendor that has the key between pins 1 and 4 and it totally screwing up my system I'm trying to commission.

Running into a funny issue. I'm used to M12 A-code 4-pin with pin 1 being brown, pin 2 being white, pin 3 being blue and pin 4 being black. And with pin 1 being next to pins 2 and 4 with the keyed part of the connector in between pins 1 and 2.