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)
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
Complete electrical isolation between power and signal. ✅ Why Use 4-20 mA? The most common setup where the transmitter is