The 4-20mA analog current loop is a workhorse of automation, but initial setup and troubleshooting can be challenging, here are some tips to help. For all types of industrial machinery and automation, a basic 4 to 20 milliamp (4-20mA) wiring scheme has been one of the most prominent installation methods for transmitting analog signals. Digital…
Smart vision sensors incorporate on-board machine learning, empowering users to deploy them in common applications, without the cost and complexity of traditional products. Common photoelectric (PE) sensors are the most basic type of “vision” device, but traditionally it has required much more advanced technology to capture and analyze actual images for advanced detection. In an…
It happens more often than we’d like in the material handling industry. During an accumulation conveyor start-up, the photoelectric sensors cannot detect the totes that the conveyor transports. Even worse is when a conveyor system that has worked fine for a long time is suddenly unable to detect new totes introduced into the system. In…
When choosing a photoelectric sensor for an application there are many things to consider. One of these considerations is whether to select a light-operate or dark-operate photoelectric sensor. The terms “light-operate” and “dark-operate” refer to when the sensor activates its output. For a light-operate sensor (also called light-activated, light-on, or simply L.O. sensor), the output…
Using thermocouple sensors to measure temperatures in industrial applications. Thermocouple Definition Temperature measurement is one of the most common requirements for any industrial automation or digitally-monitored system. It is often necessary to detect the temperature of gases, liquids, and physical equipment components. The primary contact-based technologies for doing so are thermocouples (TCs), resistance temperature detectors…
+Tech TopicsDiscrete SensingLearning ResourcesProcess Sensing & ControlProductProgrammable ControlSensors Automation
Basic Sensors - PLC Fundamentals
For a PLC to monitor and in turn control its application variables, there must be a way for it to sense its surroundings. In today’s industrial realm, there are a huge variety of electrical sensors that provide the input data (position, distance, level, flow, etc.) that control systems need. These basic sensors can be broken…
A variety of analog signals must be transmitted to a PLC for monitoring and control, with each processed to ensure correct operation. Winn Paulk, the Automation Controls Group Product Manager at AutomationDirect, wrote an article for the November 2018 issue of Processing magazine titled Configuring analog devices to integrate with PLCs. All programmable logic controllers…
New design improvements have been made to AutomationDirect’s ProSense® line of temperature switches. TSDA25 series temperature switches are a direct replacement for the TSD25 series and provide higher accuracy and a standard sized 6mm diameter probe.
Sensors and transmitters convert a variety of physical properties into discrete and analog signals for use by automation controllers. AutomationDirect offers an assortment of these devices for use in the design and operation of machines and processes to create reliable, robust and consistent automation. It may only take a small change in a physical property…
AutomationDirect’s AcuAmp® line of power products now includes the CTF series 5A secondary current transformers. Designed for applications such as ammeters, wattmeters, panel meters, instrumentation, and energy management systems, these current transformers offer a compact, cost-effective means of measuring primary current.