Extron IN1804 DI/DO four-input 4K /60 4:4:4 scaling switcher with DTP2 input and output is the newest member of the IN1804 family of scalers.

This circuit is a low-cost alternative that provides not only a 4- to 20-mA output, but also a digital feedback signal that indicates an open wire in the current loop (Figure 1 ). One output-port pin ...

Off-the-shelf process controllers often have 4- to 20-mA (sometimes 0- to 20-mA) output options for adjusting speed, pressure, temperature, or some other parameter in a closed-loop control system.

Figure 1: This loop-powered 4-20 mA transmitter features PWM drive and galvanic isolation from the input signal. (Click on image to enlarge) The external PWM-encoded signal is a rectangular waveform ...

600T series signal splitters receive a 4-20 mA current input and provide two identical isolated 4-20 mA output signals.