Description
Product Introduction
The Foxboro FBM241 (Part Number P0914TN) is an 8-channel input / 8-channel output combination discrete Fieldbus Module designed for the Foxboro I/A Series and EcoStruxure DCS platforms. Perfect for skid-based systems and space-constrained enclosures, the FBM241 handles both digital feedback sensing and actuation control in a single module, eliminating the need to install separate input (FBM207) and output (FBM216) cards.
The module inputs monitor dry contact states or external DC voltage levels (limit switches, pushbuttons, motor status feeds), while the output channels switch external power to field loads (solenoids, motor starter coils, indicator lights). Optical isolation between field terminals and the 200 Series baseplate backplane protects system logic from external electrical noise, voltage surges, and inductive load kickback spikes.
Key Technical Specifications
| Parameter | Value |
| Manufacturer | Foxboro (Invensys / Schneider Electric) |
| Part Number | FBM241 / P0914TN (RoHS Equivalent: RH914TN) |
| Series | Foxboro 200 Series Subsystem |
| Channels | 16 Channels total (8 Discrete Inputs / 8 Discrete Outputs) |
| Input/Output Types | Contact Sense/DC Input + External Voltage Switching Output (via TA) |
| Isolation Voltage | 1500V AC channel-to-bus optical isolation |
| Power Dissipation | 3.5W maximum from baseplate power rails |
| Mounting | Foxboro 200 Series DIN-rail baseplate (P0926KE / RH916AQ or equivalent) |
| Operating Temp Range | -20°C to +70°C (-4°F to +158°F) |
Application Scenarios & The “Trench” Experience
The Trench Story
It is 03:05 AM at a water recovery plant. An automated backwash pump skid fails to execute its timed flushing cycle. The DCS console displays a “DI/DO CARD FAULT” on the local remote I/O panel. Field checks reveal that an inductive surge from a faulty 24V DC solenoid coil damaged Channel 3’s output stage and knocked out adjacent input sensing channels on an old combination module. The duty technician retrieved a bench-verified FBM241 (P0914TN) module from emergency stock. Hot-swapping the card on the live rack restored both pump run status sensing and solenoid trigger outputs instantly, resuming automated backwash cycles without overflowing the equalization basin.
Target Application Scenarios
- Compact OEM Skid Integration: Provides complete discrete control (8 inputs / 8 outputs) for packaged chemical dosing units, compressor skids, and valve manifolds.
- Motor Control Centers (MCC): Reads run/stop/trip auxiliary contacts while sending start/stop interlock commands to motor starters from a single slot.
- Safety & Interlock Stations: Monitors local ESD pushbuttons and status switches while actuating local beacon lights and trip solenoids.
Field Case Study
A food processing facility in Wisconsin experienced intermittent input dropping and output latching on a bottle capping line controlled via a Foxboro 200 Series baseplate. Diagnostic traces identified thermal stress on the internal driver stage of the installed card. A pre-tested replacement P0914TN module was shipped overnight. The site electrician bypassed the active interlocks, hot-swapped the FBM241 card on the live baseplate, and restored 100% input sensing and output control in under 10 minutes.
FBM241
FBM241
Transparency SOP: Quality Assurance & Testing
We don’t just ship boxes; we test them on actual Foxboro 200 Series racks. Every FBM241 / P0914TN module undergoes a strict 5-stage workbench validation process prior to dispatch:
- Inbound Visual & Mechanical Inspection: Detailed inspection under high magnification to check PCB trace health, edge-connector gold plating, housing locking tabs, and inspect for thermal degradation on driver transistors and input optocouplers.
- Cold Power Rail Diagnostics: Resistance checks across internal bus rails, power conversion stages, and line drivers to rule out shorted components.
- Live Baseplate Bus Handshake: Module is mounted on a live Foxboro 200 Series baseplate connected to a Control Processor to verify bus address recognition, module handshake, and proper LED status routines.
- 16-Channel Concurrent Input & Output Test: Signal simulators toggle all 8 input channels while test loads (relays and indicator lamps) are wired across all 8 output channels. We execute rapid ON/OFF cycles, verifying fast input logic transitions and clean output switching in Foxboro I/A system software.
- Anti-Static ESD Packaging: Cleared modules receive solvent contact cleaning, thorough drying, and are sealed in heavy-duty anti-static ESD shielding bags prior to custom foam packaging.
The Veteran’s Tech Trap Guide
- ⚠️ Do Not Confuse (8IN / 8OUT) with Single-Purpose Cards (FBM207 or FBM216)!
The is a combination module. Inserting an into a slot configured in the software database for an FBM207 (16 inputs) or FBM216 (8 outputs) will cause system database mismatch errors.
- ❗ Verify Termination Assembly (TA) Compatibility.
Because the splits its channel mapping between inputs and outputs, you must use the corresponding combination Termination Assembly (such as P0916AW / P0916AX or equivalent). Mismatching TAs can lead to unassigned channel lines or damaged optocouplers.
- ⚠️ Install Surge Suppression on Inductive Loads.
When switching inductive field loads (solenoid valves, motor contactors) through the ‘s output channels, ensure flyback diodes (for DC loads) or RC snubbers (for AC loads) are installed across the load terminals to prevent inductive back-EMF spikes from damaging output driver transistors.
- ❗ Bypass Active Loops Before Hot-Swapping.
While Foxboro 200 Series baseplates fully support Live Insertion and Removal (Hot Swap), pulling an card instantly drops drive power to all 8 output channels and sets all 8 input channels to “BAD” status. Always place downstream actuators and interlock logic into manual bypass prior to extraction.
Frequently Asked Questions (FAQ)
Q: Can I hot-swap the Foxboro module while the baseplate is powered?
A: Yes, Foxboro 200 Series baseplates support Hot Swap (Live Insertion and Removal). However, pulling the module de-energizes all 8 output channels and invalidates all 8 input channels immediately. Place downstream equipment and interlock blocks into manual bypass prior to removing the card.
Q: What is the exact difference between part numbers , P0914TN, and RH914TN?
A: “” is the functional model designation used in DCS engineering software, “” is the standard Foxboro hardware part number, and “RH914TN” is Schneider Electric’s RoHS-compliant (lead-free) hardware equivalent. and RH914TN are 100% functionally and mechanically interchangeable.
Q: Does the supply internal power to drive field output loads?
A: No. The provides optically isolated switching outputs. Operating power for field devices (such as 24V DC or 120V AC) must be supplied externally and wired through the matching Foxboro Termination Assembly (TA).
Q: What warranty covers these pre-tested modules?
A: Every ( / RH914TN) module sold includes a full 12-Month Functional Warranty. If the card experiences hardware failure under normal operating parameters within 365 days, we provide an immediate unit replacement or full credit.
Q: Why buy pre-tested surplus stock instead of ordering directly from Schneider Electric?
A: Factory lead times for mature Foxboro 200 Series hardware can stretch into weeks or months, and factory list pricing for legacy platform hardware is high. Pre-tested surplus stock allows you to restore critical discrete control and monitoring loops immediately at a fraction of the cost.
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