The series has two variants, the A (inlet) and B (outlet) types. Both are similar but have different keying to prevent mismating and are different colours. This means it is impossible to produce a short circuit with correctly wired connectors.

Type A is for power inlet, and is colour coded blue (equivalent in function to IEC320 cable female and panel male). Type B is for power outlet and is colour coded grey (equivalent in function to IEC320 panel female and cable male).