Shema Tokovaja Petlja 4 20 Ma May 2026

A is the gold standard for analog signaling in industrial automation. It uses a constant current to transmit data from sensors to controllers (PLCs), offering high reliability over long distances. 💡 How It Works

The system translates a physical measurement (like pressure or temperature) into a current signal between 4 mA and 20 mA. Represents the 0% or minimum value of the range. 20 mA: Represents the 100% or maximum value of the range. shema tokovaja petlja 4 20 ma

The sensor has its own dedicated power source (often AC or high-voltage DC). A is the gold standard for analog signaling

Typically 24V DC to drive the current through the loop. Represents the 0% or minimum value of the range

Handles power-hungry sensors (e.g., gas detectors). 4-Wire Connection (Fully Isolated)

The most common setup where the transmitter is powered by the loop itself. Two wires carry both power and the signal. Benefit: Saves cable costs and simplifies installation. 3-Wire Connection (Active)