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4–20mA sensor transmitters are very common in industries to measure physical parameters such as pressure, temperature, flow, etc. Based on how they are connected to the process control and automation systems, they are classified into 2-wire, 3-wire, and 4-wire signal transmitters. This article will help you understand the underlying concepts and the difference between 2-wire, … Read more
Sourcing and sinking are the core terms of PLC wiring and can greatly affect the reliability and functionality of your control system. In this article, we will explore these fundamental concepts and ensure the success in design and installation of a PLC system. What is sinking and sourcing? Sinking and sourcing refer to two distinct … Read more
4-20mA Current loops are widely used to transmit process variable data such as temperature, pressure, flow rate, level, consistency, speed, etc between the process controllers and the field devices. Transmitters convert these process signals to 4-20mA DC for the purpose of transmitting the signal. This signal can be transmitted to a long distance with little … Read more
Below is the list of the most important interview questions on Modbus: 1. What is Modbus and how does it work? Modbus is an application protocol that defines rules for organizing and interpreting data and is essentially a messaging structure that is independent of the underlying physical layer. It is an open-source protocol and is … Read more
Distributed Control Systems (DCS) is being used to control a production plant or a process for over 40 years now. They were commercialized with the launch of TDC 2000 by Honeywell and CENTUM systems by Yokohama. Distributed control systems have been evolving since then. Here is the list of the top 10 leading players in … Read more
Industrial automation and robotics enable large-scale manufacturing at a lower cost. It enables an increase in productivity and product quality. There are many industrial automation service providers around the globe. Here is the list of the top 10 industrial automation companies in the world. Top 10 Industrial Automation companies Siemens AG – Germany ABB – … Read more
Here are the most frequently asked Interview questions on PLC. This article aims to cover most of the interview questions on programmable logic controllers so as to prepare you to crack a job interview. List of Interview questions on PLC What is a PLC? PLC stands for ‘Programmable Logic Controller’. It is an industrial computer … Read more
In the world of industrial automation, Programmable logic controllers (PLC) and Distributed Control Systems (DCS) are used to control or automate a process or a machine. They monitor the field signals and operator inputs and make decisions based on how they are programmed. Here you can understand the difference between PLC and DCS. What is … Read more
The bipolar junction transistors exist as NPN and PNP types. This article intents to help you understand the difference between these two types and how to use them in a circuit. Also, this will be helpful to automation engineers and instrumentation engineers in understanding 3 wire sensor connections. Transistors are made by combining two types … Read more
Proximity sensors are used to detect the presence of an object without any direct contact. It is used as an alternative to the limit switches. There are various types of proximity sensors available in the market. Their invention led to a revolution in the field of industrial automation and robotics. Proximity switches were developed by Wilfried … Read more
