Description
Foxboro FBM206 P0916CQ
Technical Specifications
- Input Capacity: 8 independent, isolated pulse input channels
- Signal Type: 2-wire pulse inputs (7 to 27 V DC configurable)
- Input Pulse Rate: 10 Hz to 25 kHz
- Communication: Redundant 2 Mbps Module Fieldbus
Functional Features
- High-Speed Pulse Acquisition: Accepts pulse inputs at maximum rates of 25 kHz with zero missing pulses, ensuring highly accurate flow calculations.
- Advanced Signal Processing: Executes configurable pulse rate accumulation, resolution options, and instrument scaling factors directly on the module.
- Robust Electrical Isolation: Every channel is completely isolated from other channels and ground, effectively preventing ground loops and electromagnetic interference.
- Field Power Provision: Each channel provides up to 24 V DC (±10%, max 30 mA) to power 2-wire field devices.
Application Scenarios
Extensively deployed in oil and gas, petrochemical, and water treatment facilities to interface with turbine flowmeters, vortex flowmeters, solid-state sensors, and electromechanical contacts.
Performance Parameters
- Pulse Count Accuracy: Zero missing pulses at rates from 10 to 25 kHz
- Pulse Rate Accuracy: 0.01% of reading, independent of the rate
- Input Channel Impedance: 10 kΩ
- Power Consumption: 7 W maximum
Material Composition
Housed in a rugged, extruded aluminum enclosure that provides superior physical protection and EMI shielding. Internal circuit boards feature industrial-grade conformal coating for harsh G3-class environments.
Structural Characteristics
Standard 200 Series Fieldbus Module (FBM) form factor with dimensions of 43mm × 43mm × 25mm and a weight of 0.6kg. Connects to the field via a dedicated Terminal Assembly (TA) for local or remote wiring.
Working Principle
The module receives 2-wire pulse signals from field sensors, conditions the electrical signals, and counts the pulses with high precision. It then packages this data and transmits it to the Fieldbus Control Module (FCM) or Control Processor (FCP) over the redundant 2 Mbps Module Fieldbus.
Installation Requirements
Install on a compatible Foxboro 200 Series baseplate. Ensure the maximum distance between the field device and the FBM complies with voltage drop and wire resistance calculations. Connect the TA securely to the module.
Usage Precautions
Verify that the field device’s output voltage falls strictly within the 7 to 27 V DC range. Do not exceed the 30 mA loop power limit per channel. Ensure proper grounding of the TA to maintain channel isolation integrity.
