Solution with LOGO!

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Connecting field devices

In addition to the LOGO! device, all you need is the pressure switch and the float switches to control the pump. If you are using a 3-phase AC motor, a contactor relay is required for switching the pump. In systems with single-phase AC pumps, you must install a contactor relay if the current of the AC pump exceeds the switching capacity of the output relay Q1. A solenoid valve can usually be controlled directly, due to its low power consumption.

Connection diagram

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Block diagram

The block diagram shows you how to interconnect the pump controls and the solenoid valve. Its layout corresponds with the structure of the circuit diagram.

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Options

For specific applications, you also have the choice of integrating additional functions which could otherwise only be realized with additional switchgear:

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