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Main Functions

1. Field Signal Interface & Isolation Processing It serves as the input/output interface sub‑board for flow transmitter. It isolates, conditions and routes analog signals, pulse signals and status signals between the transmitter main board and external field equipment. It provides galvanic isolation to protect measurement circuits from ground loop interference and surge noise.
2. Standard Industrial Signal Conversion Processes outgoing 4‑20 mA analog output, pulse / frequency output for flow rate and totalizer value. It also handles status alarm output. Converts internal digital measurement data into standardized hardware signals for external automation systems.
3. Digital Communication Physical Layer Processing Provides hardware interface for fieldbus communication. Realizes physical‑level signal transceiving for HART or PROFIBUS protocol, completes signal filtering and impedance matching for bus communication between flow meter and PLC / DCS host system.
4. External Wiring Termination & Signal Routing Works with terminal connectors to receive external loop power and output measurement signals. Distributes signals between transmitter main board, power supply board and field wiring terminals inside instrument housing.
5. Circuit Protection & Diagnostic Feedback Equipped with surge‑suppression components for over‑voltage and electrostatic protection. Cooperates with transmitter main CPU for channel fault diagnosis, reports short‑circuit, open‑loop and communication failure status, supports instrument alarm code output for on‑site troubleshooting.

Note: 322106‑0200 A is EOL (End‑of‑Life) obsolete spare part. It cannot work independently. It must be assembled inside matching FLOWTEC flow transmitter together with main board and power board. Original mass‑production has been discontinued, only used as aftermarket replacement spare component.

E+H FLOWTEC 322106-0200 A

Applications

This interface sub‑board is dedicated replacement spare part for old‑generation Endress+Hauser FLOWTEC electromagnetic flow transmitters:

• Process industry flow measurement: signal transmission for flow meters in water‑wastewater, chemical, pulp‑paper, utility and metallurgical plants.
• Pipeline flow monitoring: transmits flow, totalizer and alarm signals to DCS / PLC for flow monitoring, dosing control and data logging.
• Instrument maintenance & on‑site retrofit: direct replacement for defective original I/O communication board on existing FLOWTEC flow transmitters, restores analog output, pulse output and digital bus communication functions.
• Industrial automation system integration: ensures reliable data exchange between flow measuring instrument and upper‑level control system for closed‑loop process regulation.

E+H FLOWTEC 322106-0200 A

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