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This month we discuss solutions for isolating and splitting 4-20mA signals to ensure accurate and reliable measurements.
To discuss your application with our team of experienced I/O experts or get a quote, call us at 877-295-7035 or email us at email@example.com.
Eliminating 4-20mA Errors and Extending Loops with Signal Isolators and Splitters
The primary function of a signal isolator is to eliminate ground loops that may exist between two or more instruments. A classical application isolates the control room equipment (computers, PLC, DCS etc.) from field devices which may have different ground potentials. In addition to breaking up ground loops, the isolators protect control room equipment from damaging transient spikes and noise generated in the field.
Signal splitters take a 4-20mA signal and provide two identical isolated 4-20mA outputs for routing to different instruments, such as a recorder and a controller. Each channel operates independently and is isolated from the other to prevent interaction.
Choosing the proper and most cost-effective isolator requires an understanding of the application and consideration of future expansion requirements. This is why Acromag offers dozens of isolator and splitter models to cover all the possible system configurations. Should you use two-, three-, or four-wire electrical connections? Will the isolator operate off AC, DC, or loop power? Do you need input, output, or 3-way (input, output, power) isolators? Then there are the mounting, calibration, and load resistance issues. For help selecting the best unit for your situation, call us or download our application notes below.
Download 4-20mA Isolator and Splitter Application Notes and learn:
• How to isolate input and output signals to and from a controller.
• How to use a 4-wire isolator "splitter" to excite a field device and re-transmit the 4-20mA signal to two different locations.
• How to re-transmit a 4-20mA signal to three locations.
• How to re-transmit from a 2-wire loop to a second location.
For more information, download White Paper Introduction to 4-20mA Loops.
New Acromag Distributors in Australia & Turkey
Metromatics with offices in Brisbane, Melbourne, Sydney, and Adelaide are able to provide a solution for your I/O needs. You can reach Metromatics at firstname.lastname@example.org or visit their website for more information.
Areskom headquarters is in Istanbul and their primary goal is to provide telecommunications, network, or industrial data communication solutions to institutions and companies to enforce their competition advantage by first analyzing the present situation of their infrastructures with site surveys and then implanting cost effective custom made technology solutions. You can reach Areskom by email at email@example.com or visit their website for more information.