Recommended 4 pin plug/socket type etc

[Neale]

I wouldn't be happy with DIN connectors. They are not particularly robust and they are going to be pushing the limit in current capacity. I use XLR personally. Easily available (although more costly), robust (used a lot for stage equipment which is always being plugged/unplugged and generally abused), connectors latch together so vibration doesn't make them fall apart, and fairly chunky pins which seem to handle the current. Also take CY cable without too much effort. I'm sure there are other more industrial connectors around but I used the ones that I know. I bought from Rapid Online in bags of ten or so, and fitted sockets on both router and control box with a set of leads to match. I'm planning to use them again on my new router, for steppers and for limit/e-stop connections, although as the control box will be attached shall probably have plugs and sockets at the control box end.