Technical Specifications Module Type: Redundant HART‑capable Analog Output Module Channel Quantity: 8 galvanic‑isolated output channels Output Signal: 4‑20 mA DC with HART protocol superimposed signal HART Version: HART Protocol v6 Communication Interface: Redundant I/A fieldbus Operating Power: 24 VDC Operating Temperature: 0 °C to +60 °C Storage Temperature: −40 °C to +85 °C Relative Humidity: 5%‑95%, non‑condensing Mounting: DIN‑rail baseplate installation Certifications: CE, HART protocol compliance certification
Functional Features Eight independent galvanic‑isolated analog output channels with embedded per‑channel HART modem. Supports module‑pair redundancy for critical control loop uninterrupted operation. Output hold function maintains last valid output value upon fieldbus communication failure. Built‑in channel load fault diagnosis for open‑loop and abnormal load conditions. Supports HART universal commands for remote configuration and diagnostic data acquisition of field instruments. Hot‑swappable module design for on‑site maintenance replacement without field wiring disconnection.
Application Scenarios Applied in petrochemical, chemical and power‑plant DCS control systems. Used for critical regulating loops requiring high‑availability control, matched with HART intelligent valve positioners and analog actuators.
Structural Characteristics Compact 200‑series rugged aluminum housing. Gold‑plated bottom connector for electrical connection with DIN‑rail baseplate. Front‑panel LED indicators display power, bus communication, master‑tracker status and channel fault alarm.
Working Principle Field control processor sends digital control commands and HART instructions to FBM218 via redundant fieldbus. Internal D/A conversion circuit generates 4‑20 mA analog output, and superimposes HART FSK digital signal onto analog loop.
Installation Requirements Mount matched baseplate on standard 35 mm DIN‑rail inside control cabinet. Insert FBM218 onto baseplate and lock mechanical buckle. Complete field HART actuator wiring on matched termination assembly terminals. Connect redundant fieldbus cable between baseplate and field control processor. Configure redundancy mode, HART parameters and fail‑safe hold settings in DCS configuration software after power‑on.
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