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 ...

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 ...

Many instrumentation and control applications use analogue current loops as the physical links for telemetry measurements and remote actuator control. Most popular is the 4 to 20mA standard, in which ...

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 ...

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 ...