Reed Switch Plc Wiring
They are most commonly used in conjunction with inlet and outlet valves in a liquid level control system or in a heating and mixing application.
Reed switch plc wiring. An ordinary switch has two electrical contacts in it that join together when you push a button and spring apart when you release it. This module provides an analog as well as digital interface as you can see on the board it has a potentiometer trimmer used as a pull up resistor. Plc basics level limit switch level switches more commonly called level sensors are used to control the height of a liquid inside a container usually a tank. Reed switch the voltage drop across the resistor can be used as an input signal for the mcu to obtain on off information.
Youtube me channel name khatu shyam plc program and shyam plc program all video used in my channel. And a turck 2 wire sensor has an off state leakage current of 0 8 ma or less. Also solid state sensors can carry only low current typically less than 25ma. Youtube me channel name khatu shyam plc program and shyam plc program all video used in my.
Con versely solid state sensors are typically three terminal devices with power supply ground and output pins. A magnetic door switch for example is just a dressed up reed switch and a mating magnet by keeping both parts of the switch separate the door can open and close freely and maintain its regular duties as a door the anemometer in our weather meter combines a. They re perfect for any projects that require non contact control. What is a reed switch.
There are all sorts of creative applications for reed switches. How to full working principal pnp vs npn proximity sensor and reed switch working in relay besics. I just checked that for the typical et200s 24v input module the off state current from the sensor must be max 1 5 ma. And there are 24v plc inputs that are 2 wire compatible.