Description
- Model: Foxboro FBM201 (P0914SQ)
- Brand: Foxboro (Schneider Electric / USA)
- Series: I/A Series Distributed Control System (DCS)
- Core Function: Interface between 8-channel analog input signals and the DCS backplane
- Condition: Original New Surplus (New in Box), Factory Sealed
- Type: Fieldbus Module (FBM)
- Key Specs: 8 Channels | 0 to 20 mA DC | 124 Ohm Input Impedance
- Number of Channels: 8 isolated analog input channels
- Input Signal Range: 0 to 20 mA DC (Supports 4-20 mA signals)
- Input Impedance: 124 Ohms nominal
- Accuracy: ±0.03% of span (High precision for process control)
- Resolution: 15-bit A/D converter
- Field Connection: Requires a Termination Assembly (TA) (e.g., P0916AA)
- Isolation: 600 V AC between field channels and logic; 2000 V AC to ground
- Communication: Redundant 2 Mbps Fieldbus (HDLC)
- Power Consumption: 3 Watts (typical) @ 24 V DC
- Operating Temp: -20°C to +70°C (-4°F to +158°F)
- Regulatory: G3 harsh environment rating (optional depending on batch)
FOXBORO FBM201
Installation & Configuration Guide
In my experience, the FBM201 is one of the most reliable modules in the Foxboro I/A Series, but it’s strictly a “passive” listener. It does not provide loop power to your field transmitters. If you plug in a 2-wire transmitter and get a 0 mA reading, you probably forgot to wire in the external 24 V DC power supply.
Phase 1: Preparation (10 minutes)
⚠️ Safety First:
- Confirm the Fieldbus (FCM) is active and the baseplate is powered.
- Check your Termination Assembly (TA) compatibility. The FBM201 typically uses the P0916AA or P0916AB TA.
- Ensure you have the Letterbug (Address) ready for the new module.
Phase 2: Hardware Installation
- The Letterbug: Insert the address screw (Letterbug) into the back of the FBM201 before plugging it in. If you forget this, the DCS won’t recognize the module.
- Seating: Align the module with the baseplate slots. Press firmly until the top and bottom latches click.
- Cable Management: Secure the cable from the FBM to the TA. Ensure the grounding bar on the TA is properly bonded to the cabinet earth.
Phase 3: Configuration (IACC/ICC)
- Open your Foxboro configuration tool (Integrated Control Configurator).
- Add the FBM201 to the correct Fieldbus.
- Define your 8 points. Remember, the FBM201 is 0-20 mA. If you are using 4-20 mA, you must set the “Point Range” to 4-20 mA in the software to avoid “Under-range” alarms at 4 mA.
Phase 4: Loop Check
- Use a process calibrator to source 4 mA, 12 mA, and 20 mA into each channel.
- Verify the value on the FoxView/FoxSelect workstation.
- Check the “Status” LED on the module. It should be solid green (Operational). A flashing green usually means it’s in a “ready” state but not yet configured.
FOXBORO FBM201
Customer Cases & Industry Applications
Case 1: Oil Refinery – Lightning Strike Recovery A refinery in Southeast Asia suffered a nearby lightning strike that took out an entire baseplate of I/O. The FBM201 modules in the crude unit were fried. The local Schneider representative had a 6-week lead time. We provided four Original New Surplus units within 72 hours. Result: The crude unit was restarted 10 days ahead of schedule, saving the refinery millions in potential lost production.
Case 2: Power Plant – Expanding I/O for Emission Monitoring A coal-fired power plant needed to integrate new Continuous Emissions Monitoring (CEMS) analyzers. They had empty slots in an existing I/A Series baseplate but no spare modules. They purchased two FBM201 modules from us to handle the new 4-20 mA signals. Result: Seamless integration into the existing DCS without the need for a system-wide upgrade.
FOXBORO FBM201e P0924TR
Frequently Asked Questions (FAQ)
Q: Is the FBM201 the same as the FBM201b? A: No. The standard FBM201 is for 0-20 mA signals. The FBM201b is typically used for 0-100 mV or other specialized low-level signals. Always check your P-number (e.g., P0914SQ) to be 100% sure.
Q: Can I use this for 2-wire transmitters? A: Yes, but you must provide an external 24 V DC power loop. The FBM201 is a current-sinking input; it does not “source” power to the field device like the FBM217 does.
Q: Does it come with the Termination Assembly (TA)? A: Usually, the FBM201 module and the TA are sold separately. If you need the TA (e.g., P0916AA) or the cables, please let us know so we can quote them as a bundle.
Q: Why is my module status “Failed” in the DCS? A: Check the Letterbug address. If two modules have the same address on the same Fieldbus, they will both fail. Also, check the baseplate fuse—if the fuse for that slot is blown, the module won’t power up.
Q: Is “New Surplus” reliable for a DCS as old as the I/A Series? A: Absolutely. Because these modules were designed for 20+ years of continuous operation, “New Surplus” units that have been stored in climate-controlled environments are essentially as good as the day they were made. We perform a full diagnostic check on our FBM201 stock to ensure the 15-bit A/D conversion is accurate.
