What’s the difference between LJ12A3-4-Z/BY/BX/AY/AX


The LJ12A3-4-Z series sensor is a 12mm diameter 60mm length with a 1.2 meters cable sensor.
It can input a DC 6-36v voltage. It has 3 cables, the brown is power+, the blue is power-, the black is the signal.
The detect distance is 4mm.
Meaning of AX/AY/BX/BY:
A: Normal Close
B: Normal Open
X: NPN
Y: PNP
So,
AX is normal close, NPN
AY is normal close, PNP
BX is normal open, NPN
BY is normal open, PNP
More details click here: LJ12A3-4-Z/BY 

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