Dear Sir,HiThanks for sharing your project with us it was helpful.I have a similar project in which i have to connect 4 (up to 6) Load cells to a S7-1200 PLC through a Modbus transducer (made for load cell). UNIVERSAL USE: It is compatible with any load cell or strain gauge sensor, available on the market with mV / V output and standard ¼ GAS connection. If you want to take multiple load cells into a PLC, you have two options. Electronic weighing machine uses load cell to measure the load or pressure produced by the load, here most load cells are follows the method of strain gauge, Which converts the pressure (force) into an electrical signal, these load cells have four strain gauges that are hooked up in a Wheatstone bridge formation. This load cell amplifier and weighing indicator (LCA20) offers options of local or remote LCD displays, isolated 4-20 mA 0-10 V analogue outputs, relay outputs for control or alarm functions and in-flight compensation commonly used in crane overload alarms. The different load cell series cover nominal loads from 0.3kg to 500t. There are many different kinds of load cells. A Load cell used to measure tension will not reflect negative reading if installed upside down and will result in an erroneous reading. Three IP67 M12 connectors. Guidelines for PLC installation, wiring and connection precautions (on photo SIMATIC S7-1500; credit: SIEMENS) A complete set of documents with precise information regarding I/O placement and connections will ensure that the system is organized properly. • Accuracy applicable to high-precision load cells (nonlinearity: ±0.01% (full scale), zero drift: ±0.1 μV/°C RTI, gain drift: ±10 ppm/°C) • Screwless clamping terminal block for easy wiring. Six indicator led of the communication interface. According to the direction of the force, the load cell can be divided into tension load cell, compression load cell and tension & compression load cell. IP67 junction box made of stainless steel AISI 316, suitable for aggressive environments. Now, before I even convert the analogue signalit, I want to amplify it. 6.1.3 High Round Silo on Three or Four Load Cells. Then, you must use a regulated power supply to provide excitation for your sensor. Of course the wiring of your loadcell to your plc … In practice, there are designated "load cell amplifiers" which will provide you with the excitation supply power and then will amplify the millivolt signal to an "analog" standard such as 4-20mA or 0-10vdc; this will provide you a much better signal "granularity". Weight sensors optimize load cell performance for filling, dispensing, and quality co As the force applied to the load cell increases, the electrical signal changes proportionally. Instead of processing each load cell output separately i connected the output together and gave to an ADC input. Connection of a load cell with 10 V supply via the EL9510 Parallel connection of load cells. Load cell amplifier model TLE is the simplest amplifier on the market to calibrate and troubleshoot. I am trying to make a weighing machine using load cells with a maximum capacity of 500 Kg.For this i made a rectangular platform with 4 load cells on each corner and i connected the +ve excitation to +5 v and the -ve excitation to GND. First, determine if your A/D device (your PLC, meter or DAS) can be configured as a differential input. How to connect and configure a load cell using HX711 transmitter with Arduino based PLC Wednesday April 26th, 2017 Technical Service In this post is showed how to use a load cell transductor with our equipment’s for example an Ardbox analog . The integration of strain gauge based load cells into process weighing instruments and control systems has come a long way since the early 1970s, when a typical batch weighing control system could easily fill a cabinet 6 ft high and 8 ft wide. Where to apply weight on load cell? One of Mantracourt’s most popular products is the LCA20. force) and PX401 slot3 (analog signals +/-10V or +/-20mA). The other is to put each load cell on its own PLC channel and add them together in PLC ladder logic. IoT Weighing Scale Project Description: IoT Weighing Scale– In this project, you will learn how to make an IoT Weighing Scale using Hx711 24 bit analog to digital converter, a 5Kg Load Cell or Strain Gauge, Nodemcu ESP8266 WIFI Module, Arduino, and a cell phone application designed in Blynk. A typical weighing system consists of a weight controller, a load cell based platform scale, and a programmable logic controller. We offer resistive load cells and capacitive load cells. plc s7 module connection Connecting load cells must be done with the right material : a load cell is basically an high precision resistor. The arrival of the Internet revolution made communications between PCs and PDAs and mobile phones possible. The transmitters provide excitation and are isolated. You can measure this with a millivoltmeter. One is to get a "summer" box that will "sum" all the voltages together (4 load cells at 50lbs each would put out 4x12mV or 48mV) which can go to one channel on the card. Our range is rounded off by mounting units which supports a optimum alignment of the load cell, protect the load cell against overloads or transverse loads and which greatly simplify assembly. Without amplification, the difference in voltage readouts when applying a range of pressures was tiny. Push-in connections speed up installation This cost-effective design keeps the load cell free of unacceptable effects. A load cell is a force transducer.It converts a force such as tension, compression, pressure, or torque into an electrical signal that can be measured and standardized. Helm weigh modules for Point I/O, ControlLogix, CompactLogix, MicroLogix and SLC Platforms feature built-in gage excitation, 16 to 24-bit A/D Conversion and 4 Millisecond update time.