Over long cable runs, an isolated 4-to-20-mA current loop ... pulse-width modulation to implement a cheap but accurate current-loop transmitter. A dual-channel isolator (E1-E2-Q1-Q2) provides ...

The current-loop transmitter in the figure employs an unusual trick to inexpensively implement an optically isolated 4- to 20-mA transmitter: operation of the quad-channel LED/transistor ...

In current loop systems, a transducer monitoring some process variable — temperature, pressure, flow, etc. — is connected to a transmitter. The transmitter is wired in series with a DC power ...

The accuracy of a 4-20 mA transmitter depends on the integrity of its current-loop path, which must be free of shunt paths and ground loops, both within the transmitter and external to it. External to ...

Current loop has a low sensitivity to electrical noise and is not affected by signal loss over cable runs or interconnections. Offering eight 4-20 mA transmitter channels, the 6520 board is perfect ...

High-Accuracy 4-20mA Current-Loop Transmitter Meets Toughest Industrial Requirements.” This includes a full circuit diagram of the interface (left), A hardware development kit is available which fits ...

Tucson, Ariz. – A programmable 4- to 20-milliamp current loop transmitter from Texas Instruments Inc.'s BurrBrown product line provides for digital calibration of sensor and transmitter errors, thus ...