Technical Specifications Board Type: I/O Signal Termination Assembly Board Signal Type: Analog and discrete field signal loop Wiring Terminal: Screw‑type field wiring terminals Operating Voltage: 24 VDC signal loop Operating Temperature: 0 °C to +60 °C Storage Temperature: ‑40 °C to +85 °C Relative Humidity: 5%‑95%, non‑condensing Mounting: 35 mm DIN‑rail or cabinet base plate mounting Certifications: CE industrial signal termination accessory compliance
Functional Features Realizes signal terminal conversion between FBM module and field instruments. Built‑in over‑voltage and surge protection for field signal loops. Signal filtering circuit suppresses high‑frequency interference from field wiring. Modular wiring structure facilitates field signal loop inspection and maintenance.
Application Scenarios Installed inside Foxboro I/A series DCS control cabinet. Cooperates with FBM series I/O modules to complete field sensor, actuator signal wiring conversion for petrochemical, chemical and power process control projects.
Structural Characteristics Insulating printed circuit board assembly with high‑strength plastic housing. Multi‑group screw terminals arranged for field signal and module cable connection. Internal integrated signal protection and filter components. DIN‑rail locking buckle for quick cabinet installation.
Working Principle Field instrument signals are connected to screw terminals of termination board.
Installation Requirements Mount 685‑069171‑100 termination board on standard DIN‑rail inside control cabinet. Complete field instrument wiring on screw terminals strictly follow wiring drawing. Connect dedicated signal cable between termination board and corresponding FBM module. Check signal loop continuity before system power‑on commissioning.
Usage Notes Distinguish signal positive and negative polarity during field wiring.
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