Shema Tokovaja Petlja 4 20 Ma May 2026

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)

Complete electrical isolation between power and signal. ✅ Why Use 4-20 mA? shema tokovaja petlja 4 20 ma

If the wire snaps, the current hits 0 mA, immediately triggering a "fault" alarm. The most common setup where the transmitter is

If you need a for a specific microcontroller like an Arduino or PLC. If you need a for a specific microcontroller

Easy to troubleshoot with a standard multimeter. 📊 Conversion Math To calculate the current ( ) for a given percentage of the range (

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

A device like a PLC or indicator that reads the signal, usually by passing the current through a 250 Ohm resistor to create a 1-5V drop for processing. 📐 Connection Types (Wiring Schemes) 2-Wire Connection (Passive)