The 4-20mA current loop is a proven and widely adopted method of industrial data communication, offering a reliable analog signal output from Doran’s scales and indicators to a range of external devices. Ideal for process control environments, this method transmits weight readings as a continuous current signal (ranging from 4 to 20 milliamps) to represent the full weight range of the connected scale.
The simplicity and ruggedness of the 4-20mA signal make it ideal for long-distance communication in environments with electrical noise. It integrates seamlessly with PLCs, chart recorders, data acquisition systems, and other analog control systems, providing a dependable, linear output signal that is proportional to the weight measured by the scale.
KEY PERFORMANCE FEATURES INCLUDE
Rugged, Industry-Standard Output
Doran’s 4-20mA output option provides a dependable analog signal commonly used across industrial automation and process control systems. It delivers a linear current output that corresponds to the weight on the scale, allowing for straightforward integration with analog controllers and monitoring equipment. Because the 4-20mA signal is less susceptible to voltage drops or electrical noise over long cable runs, it remains a trusted standard in harsh manufacturing environments.
Accurate Signal Over Long Distances
With the ability to transmit reliable data over extended distances—often up to several thousand feet—the 4-20mA signal is ideal for plant-wide installations. Unlike voltage signals, which can degrade over long runs, the current-based 4-20mA signal remains stable, ensuring accurate and consistent readings at the receiving end.
Easy Integration with Existing Systems
The 4-20mA signal is natively supported by a wide variety of process controllers, chart recorders, PLCs, and SCADA systems, making it a plug-and-play solution in many industrial settings. Whether used for real-time weight monitoring, batching, or automated control, the analog output ensures smooth compatibility without the need for complex protocols or conversions.
Continuous Weight Monitoring
Because the 4-20mA output continuously transmits weight data in real time, it is well-suited for applications that require live tracking of material weight, tank levels, or load changes. This continuous feedback enables precise process adjustments and helps maintain tight control over production tolerances.