L+: DC24V+

1L\2L\3L: The output cable can be DC or AC, and the DC is connected to DC+ (the voltage range is 5-28.8V, 20.4-28.8V depends on the PLC model and Q position), and the AC phase connection cable (up to 250V). If the relay outputs, the range is 5-.

M: DC24V-

1M/2M: input and output are common. Only for DC, then DC. The previous numbers represent different groups, that is, different groups can use different power supplies, and so does 1L/2L/3L.

N: AC 220 volt neutral line