20 Ma: Shema Tokovaja Petlja 4

Can run hundreds of meters without signal loss (unlike voltage, which drops over distance).

Two wires for power (+ and -) and one shared wire for the signal. shema tokovaja petlja 4 20 ma

Converts the sensor signal into the 4-20 mA current. Can run hundreds of meters without signal loss

The 4 mA floor allows the system to distinguish between a "zero" reading and a broken wire (0 mA). 🛠️ Main Components A functional circuit consists of four essential parts: Sensor/Transducer: Measures the physical variable. shema tokovaja petlja 4 20 ma

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)