AB 1761-L20BWB-5A MicroLogix 1000 Series

The digital output port controls the start-stop and speed of the motor to achieve the machining operation of the workpiece.

Industrial automation control system: In the process of chemical production, many complex chemical reactions and physical processes are involved, which require precise control of temperature, pressure, flow rate and other parameters. 1761-L20BWB-5A controller's analogue input port is connected to the temperature, pressure and flow rate transmitters, which collects analogue signals of these parameters in real time and converts them into digital quantities for processing. According to the preset control strategy, the controller controls the opening of the regulating valve through the analogue output port to regulate the flow of materials and the reaction conditions to ensure the safe and stable operation of the production process and to improve the quality of the products and the output. In the wastewater treatment plant, the digital input port of the controller receives signals from liquid level sensors, water quality detection sensors, etc. to judge the liquid level and water quality of the wastewater. 

The analogue input ports collect data from pH sensors, dissolved oxygen sensors, etc., to monitor the effect of sewage treatment. The digital output port controls the starting and stopping of pumps, fans and other equipment, and the analogue output port controls the dosage of dosing device, which realizes the automated control of the sewage treatment process, reduces the cost of labour and improves the treatment efficiency.

Building automation system: In the lighting system of intelligent buildings, the digital input port of 1761-L20BWB-5A controller is connected to the light sensor and human body infrared sensor, when the light sensor detects the ambient light intensity is low and the human body infrared sensor detects the human body activity, the controller will control the relay through the digital output port to turn on the lighting in the corresponding area. The analogue input port can collect the current and voltage signals of the lighting fixtures, monitor the working status of the lighting fixtures, and realize the intelligent control of the lighting system to achieve the purpose of energy saving and improving the user experience. 

For air conditioning system control, the analogue input port of the controller is connected to temperature and humidity sensors to collect real-time indoor temperature and humidity data. According to the preset comfort temperature and humidity range, the controller controls the control valve and frequency converter of the air conditioning unit through the analogue output port to regulate the cooling and heating power as well as the air volume of the air conditioner to provide a comfortable indoor environment for the users and reduce energy consumption at the same time.