Description
Foxboro FBM17A
Technical Specifications
- Module Model: FBM17A
- Channel Configuration: 4 AI / 2 AO / 4 DI / 4 DO
- Signal Type: 0-10V DC, contacts, and 0-20mA
- Bus Interface: 2 Mbps Redundant HDLC Fieldbus
Functional Features
- Multi-Function Integration: Combines analog and discrete I/O in a single module, maximizing cabinet space efficiency.
- High-Precision Conversion: Built-in high-resolution A/D and D/A converters for accurate signal processing.
- Complete Electrical Isolation: Full isolation between channels and system bus prevents ground loops.
- Smart Diagnostics: Wire break detection and short circuit protection for proactive maintenance.
Application Scenarios
Used for complex control loops requiring simultaneous analog monitoring, analog control output, and discrete status/command signals.
Performance Parameters
- Output Load: Drives up to 600Ω loop impedance.
- Signal Accuracy: ±0.1% of full scale typical.
- Response Time: Software-configurable digital filtering, <10ms fastest.
Material Composition
Industrial-grade flame-retardant housing with conformal-coated PCBs. High-quality screw or crimp terminals ensure reliable connections.
Structural Characteristics
Standard FBM form factor with clear channel identification and status LEDs. High-density backplane connector supports hot-swapping.
Working Principle
Input side samples analog and discrete signals via precision circuits. Output side receives digital commands, converts via D/A and V/I circuits or relay isolation to drive field devices.
Installation Requirements
Use shielded twisted pair for analog signals. Shields grounded at cabinet side only. Separate analog and discrete wiring to prevent interference.
Precautions for Use
Verify signal types and terminal definitions. Never short-circuit output loops. Place node in “Maintenance Mode” before replacement.
