How are Omron switch relays wired?

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

One. Before connecting, determine the voltage required for the proximity switch, and in the case of a 3-wire system, determine whether it is PP type or P type. The proximity switch is divided into 2-wire, 3-wire and 4-wire systems.

Two. Wire proximity switches are connected in series when connected to relays. 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 power supply

Negative electrode.

Three. The wire color of the wire 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 NP type is active low, the black output is terminated with the load, and the other end of the load is connected to the positive end of the power supply: the PP type is close to on

OFF is active-high, with the black output terminated to the load and the other end of the load to the negative end of the power supply.

Four. Generally speaking, 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 PN type is connected to the positive pole, and the PNP type is connected to the negative pole.

Five. It can be memorized in such a way that 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.

Six. The load of the proximity switch can be a signal light, a relay coil, a digital input module for the PLC. PLC digital input modules are generally divided into two categories:

1. The common input terminal is the power supply 0V, and the current flows out from the input module. In this case, the NPN type proximity switch should be selected.

2. The common input terminal is the positive pole of the power supply, and the current flows into the module. At this time, PP type proximity switch should be selected.

3. Although the wire system proximity switch has an extra wire, there is no interference of residual current, and the work is more reliable.

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