Siemens SPS starter kit 6ED1057-3BA10-0AA8 6ED1057-3BA10-0AA8 Data Sheet
Product codes
6ED1057-3BA10-0AA8
Tutorial
3.5 Practical example
LOGO!Soft Comfort Online Help
Operating Instructions, 06/2014
Operating Instructions, 06/2014
171
3.5.4
Solution with LOGO!
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
①
Pump
②
Mains water inlet