There is no industry-universal special cable for M9 connectors, the key is to ensure the cable outer diameter is within the range of 3~6mm to match the locking part of the connector.
It is recommended to use multi-strand copper core cables with wire diameter of 0.2~0.5mm², which can effectively improve wiring stability and bending resistance of the cable.
Technical Note: The outer diameter of the cable is the core matching parameter, and the wire diameter selection needs to be combined with the rated current of the M9 connector; multi-strand copper core cables are more suitable for frequent bending scenarios in industrial sites than single-strand cables.