FAC0420-02
3-Channel 4–20 mA Current Sensor
The 3-Channel 4–20 mA Current Sensor from Fidar Electronics reads the standard 4–20 mA output of any industrial transmitter and maps it back to engineering units. It connects to a FIDAQUIRE data logger over a daisy-chained CANopen bus.
Standard 4–20 mA input
Three independent input channels in one unit
Works with any industrial 4–20 mA transmitter
Broken-wire detection below 4 mA
RJ45 output on a CANopen bus
Daisy-chains up to 64 sensors per card
Works with the FBC0232-01 card and FIDAQUIRE logger
Up to 500 m of bus at 125 kbit/s
The 4–20 mA loop is the common language of industrial transmitters: pressure, level, flow, temperature, humidity, pH and dozens of other quantities all travel on it. This sensor reads any 4–20 mA transmitter into the Fidar monitoring chain, with the mA-to-engineering-unit mapping configured in software. The standard's real advantage is that true zero sits at 4 mA: anything below it means a broken wire or a dead transmitter, so the fault announces itself instead of failing silently.
Key features
Standard 4–20 mA input
Three independent input channels in one unit
Works with any industrial 4–20 mA transmitter
Broken-wire detection below 4 mA
RJ45 output on a CANopen bus
Daisy-chains up to 64 sensors per card
Works with the FBC0232-01 card and FIDAQUIRE logger
Up to 500 m of bus at 125 kbit/s
Connectivity
RJ45 CANopen output running at 125 kbit/s
Daisy-chain of up to 64 sensors on one FBC0232-01 card
Automatic input-break detection reported to the logger
Where it is used
Reading pressure, level, flow and temperature transmitters
Tank and pipeline monitoring in oil, gas and petrochemicals
Bringing environmental analysers into a monitoring system
Pumping stations and water/wastewater treatment plants
Retrofitting legacy instruments into a modern monitoring stack
Air-quality and emission-measurement systems
Installation
Run the loop in shielded twisted pair and earth the shield at one end only, so you do not create a ground loop.
