Introduction to the wiring steps of Omron switch relays

Create Date: 2024-8-30 12:03:23|Source: Omron/Omron

1. Before connecting, determine the voltage required for the proximity switch, and if it is a 3-wire system, determine whether it is PNP type or NPN type.  The proximity switch is divided into 2-wire, 3-wire and 4-wire systems.

2. When the wire system proximity switch is connected with the relay, it is in series form. That is, the relay is connected to the proximity switch to supply it with power, and the other end of the proximity switch is connected to the relay, and the coil of the relay is not divided into positive and negative poles. The other end of the coil is connected to the negative terminal of the power supply.

3. The wire color of the wire system proximity switch is generally brown, blue and black. Brown is the positive electrode, blue is the negative electrode, and black is the output. The proximity switch of the NPN type is active-low with the black output terminated with the load, and the proximity switch of the PNP type with the positive end of the power supply at the other end of the load is active-high, and the black output is terminated with the load and the negative end of the power supply at the other end of the load.

Fourth, in general, the brown wire is connected to the positive pole of the power supply, and the black wire is connected to the load, the difference is the connection method at the other end of the load, the NPN type is connected to the positive pole, and the PNP type is connected to the negative pole.

Fifth, you can memorize it in this way, the letter N is in front of the letter P, so the letter N is higher than the letter P. So NPN is connected to the positive pole, and PNP is connected to the negative pole.
Introduction to the wiring steps of Omron switch relays

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