The active barrier is used for transmitting and isolating 4...20 mA/HART signals. The device has an active or passive current input and can be connected directly to two-wire or four-wire transmitters. The device provides an active or passive output signal. The current signal is available to a PLC or controller, or to downstream devices via pluggable screw terminals or optional push-in terminals.

Advantages
Wide voltage range, 19.2...253 V AC/DC

Push-in terminals for fast and simple wiring

Can be used in SIL 2 (SC3) safety systems complying with IEC 61508

Optional installation for use in Zone 2 explosion-protected areas

Compact housing with a width of only 17.5 mm (0.69 in), making efficient use of space

Optional 180° rotated installation (power terminals facing up or down)

Field of application
Single-channel active barrier with wide voltage range

Transmits and galvanically isolates 0/4...20 mA analog signals

Can connect intrinsically safe [Ex ia] signals from hazardous area outputs

Bidirectional HART® signal transmission

Optional power supply for two-wire or four-wire devices 

Active or passive signal output

Ambient temperature range: -40…60°C (-40…140°F)

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Source:Endress+Hauserpublic information from the website