Description
Foxboro FBM20 PM700QV
Technical Specifications
- Part Number: PM700QV.
- Type: Fieldbus Module.
- Bus Interface: 2 Mbps Redundant Fieldbus.
- Signal Types: Configurable for analog or discrete I/O.
Functional Features
- High-Precision Acquisition: Built-in high-resolution A/D converters for accurate process measurement.
- Smart Diagnostics: Supports wire-break detection, over-range alarms, and short-circuit protection.
- Rugged Design: Direct field mounting capability to save cabling costs and reduce noise pickup.
- Hot-Swap Support: Allows module replacement without system shutdown (with proper procedures).
Application Scenarios
Used in field control cabinets or remote I/O stations for acquiring temperature, pressure, and flow signals in oil, chemical, and power industries.
Performance Parameters
- Accuracy: ±0.1% F.S. or better.
- Response Time: Configurable digital filtering, <10 ms fastest.
- Environment: -40°C to +85°C operating range.
Material Composition
Die-cast aluminum or high-strength flame-retardant plastic housing. Internal PCBs are conformal-coated for environmental protection.
Structural Characteristics
Compact long-strip design, DIN rail mountable. Side-mounted bus connectors, top/bottom field wiring terminals with clear channel labeling.
Working Principle
Internal microprocessor periodically converts field signals to digital, packages them, and sends via bus to the communication processor. Receives control commands to drive field devices.
Installation Requirements
Use dedicated terminal assemblies (TA). Bus wiring must follow daisy-chain topology; star branching is prohibited. Install terminators at both ends of the bus segment.
Usage Precautions
Distinguish signal ground from shield ground. When replacing, disable the node in software first to prevent bus conflicts. Verify signal configuration before connecting field devices.
