Description
Foxboro FBM201 RH914SQ
- Technical Specifications:
- Channels: 8 isolated independent input channels
- Input Ranges:
- FBM201: 0–20 mA DC
- FBM201b: 0–100 mV DC
- FBM201c: 0–5 V DC
- FBM201d: 0–10 V DC
- Isolation: Each channel is electrically isolated from other channels and ground (supports 600 V AC per minute test voltage)
- Accuracy: High accuracy via per-channel sigma-delta A/D conversion (typically within ±0.1%)
- Communication: Redundant 2 Mbps module fieldbus to associated FCM or FCP; Ethernet support via integrated network infrastructure (per I/A Series)
- Power: 24 V DC nominal; typical power dissipation under 7 W
- Environment: Operating temperature -40 °C to +70 °C; relative humidity 5% to 95% non-condensing
- Dimensions: Approximately 10.4 cm × 4.5 cm × 11.4 cm; weight about 0.284 kg
- Functional Features:
- Channel isolation eliminates ground loops and enhances noise immunity
- Per-channel sigma-delta A/D conversion for high precision
- Configurable integration time and rate-of-change limits
- Status LEDs for module health and communication
- Hot-swappable with appropriate terminal components for maintenance
- Application Scenarios:
- Analog input from 4–20 mA transmitters (pressure, flow, level) in process control
- Low-voltage measurement points in power and auxiliary systems
- General-purpose analog signal acquisition in DCS I/O subsystems
- Performance Parameters:
- Stable readings and fast updates suitable for closed-loop control
- High reliability in harsh industrial environments
- Material and Structural Characteristics:
- Housing: Sturdy industrial enclosure (often aluminum extrusion) with front-panel indicators
- Terminal block: Pluggable terminal component for field wiring
- Connectors: High-density industrial connectors for module and backplane
- Working Principle:
- Each analog input is conditioned and digitized using per-channel sigma-delta ADCs. Isolation barriers separate channel and ground. Data is transmitted to the controller over the 2 Mbps fieldbus via the FCM.
- Installation Requirements:
- Mount the module on a compatible baseplate and connect the terminal block
- Wire field analog signals per the wiring diagram, respecting polarity and shielding
- Configure range and scaling parameters via Foxboro engineering tools
- Ensure isolation and grounding guidelines are followed
- Usage Notes:
- Use shielded twisted-pair cables for analog inputs
- Verify channel configuration matches field transmitter outputs
- Regularly check connections and inspect module status LEDs
- Replace with the same or compatible variant to maintain system consistency
