Description
Product Introduction
The Foxboro FBM242 (Part Number P0916TA) is a high-density, 16-channel discrete output Fieldbus Module engineered for Foxboro I/A Series and EcoStruxure DCS platforms. Designed for reliable digital actuation, the FBM242 switches external DC power to drive field-mounted loads such as solenoid valves, interlock relays, motor starter coils, alarms, and status indicators.
Operating with external power sourcing through matching 200 Series Termination Assemblies (TAs), the module offloads output logic timing from the host Control Processor (CP). High-grade optical isolation between the internal backplane bus and the field output circuitry protects upstream 200 Series baseplate electronics from field line transients, ground potential shifts, and inductive back-EMF voltage spikes.
Key Technical Specifications
| Parameter | Value |
| Manufacturer | Foxboro (Invensys / Schneider Electric) |
| Part Number | FBM242 / P0916TA (RoHS Equivalent: RH916TA) |
| Series | Foxboro 200 Series Subsystem |
| Output Channels | 16 discrete output channels (externally sourced) |
| Output Voltage Range | 15 to 60 V DC (typically 24 V DC field supply) |
| Max Output Current | Up to 2 A per channel (subject to TA rating/total module current caps) |
| Isolation Voltage | 1500V AC channel-to-bus optical isolation |
| Power Dissipation | 3.0W 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 01:30 AM during a batch chemical synthesis run. The central DCS loses control over a bank of 8 pneumatic isolation valves on a solvent feed manifold. The DCS graphics display a “FIELD OUTPUT FAULT” across the manifold block. Investigation shows that a short-circuit on an external valve solenoid damaged the solid-state output drivers on Channel 4 and Channel 5 of an installed discrete card, disabling the whole bank’s output rail. The shift instrument technician pulled a bench-verified FBM242 (P0916TA) module from spares stock. Swapping the card on the live baseplate instantly restored valve actuation capability, enabling the batch sequence to complete without dumping raw material.
Target Application Scenarios
- Solenoid & Valve Manifold Actuation: Controls 24V DC solenoid-operated valves (SOVs) for process isolation, nitrogen purging, and burner fuel trains.
- Motor Control Centers (MCC) & Interlocks: Delivers start/stop digital command signals and safety interlock permissive triggers to motor starters and VFD control terminals.
- Annunciators & Local Status Lights: Drives local stack lights, panel LEDs, audible horns, and remote telemetry relay panels.
Field Case Study
A paper pulp mill in Maine experienced intermittent channel shutdowns on a lime kiln control rack driven by a Foxboro 200 Series baseplate. Diagnostic checks confirmed thermal breakdown on the output driver ICs of the existing discrete card. A bench-tested replacement P0916TA module was shipped overnight. The site engineer bypassed the interlock logic blocks, hot-swapped the FBM242 module on the powered rack, and restored stable 16-channel output control in under 15 minutes.
FBM242 P0916TA
FBM242 P0916TA
Transparency SOP: Quality Assurance & Testing
We don’t just ship boxes; we test them on actual Foxboro 200 Series racks. Every FBM242 / P0916TA module undergoes a strict 5-stage workbench validation process prior to dispatch:
- Inbound Visual & Mechanical Inspection: High-magnification check of PCB trace health, edge-connector gold plating, housing locking latches, and inspection for thermal stress on solid-state output transistors.
- Cold Power Rail Diagnostics: Resistance checks across internal bus rails, DC conversion stages, and output switching transistors to verify no shorted components exist.
- 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 status LED routines.
- 16-Channel Load & Switching Validation Test: Test loads (relays and lamp banks) powered by an external 24V DC power supply are connected across all 16 output channels. We execute rapid cycling and sustained load scripts to confirm clean switching, zero channel crosstalk, and proper database feedback updates 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 (16 Outputs) with FBM207 (16 Inputs) or FBM241 (8IN/8OUT)!
The is strictly a 16-channel discrete output card. Slotting an into a baseplate position assigned in the Control Database for a discrete input or combination module will cause system configuration mismatch faults.
- ❗ Ensure External Field Power (24V DC) is Present at the TA.
The does not generate power to drive external field devices; it acts as a solid-state switch. The external 24V DC field power must be supplied through the matching Termination Assembly (TA). If field power is lost, outputs will fail to actuate despite normal module status LEDs.
- ⚠️ Always Install Flyback Diodes Across Inductive DC Loads.
When switching inductive field devices like solenoid coils or relay inputs, high inductive back-EMF voltage spikes occur upon turn-off. Ensure kickback protection diodes are installed across field loads to prevent output driver breakdown.
- ❗ Bypass Output Control Blocks Before Hot-Swapping.
While Foxboro 200 Series baseplates fully support Live Insertion and Removal (Hot Swap), pulling an card instantly de-energizes all 16 output channels, dropping connected valves or contactors to their unpowered states. Always place downstream equipment 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 cuts power to all 16 discrete output channels immediately. Always place downstream valves, pumps, and interlocks into manual control or safe state prior to removing the module.
Q: What is the exact difference between part numbers , P0916TA, and RH916TA?
A: “” is the functional model designation used in DCS engineering software, “” is the standard Foxboro hardware part number, and “RH916TA” is Schneider Electric’s RoHS-compliant (lead-free) hardware equivalent. and RH916TA are 100% functionally and mechanically interchangeable.
Q: Does the output relay contact closures or solid-state voltage switching?
A: The utilizes solid-state electronic switching channels designed for externally sourced DC voltage (typically 24V DC). If dry relay contact outputs are required for your field circuit, an FBM218 or matching relay termination assembly should be used.
Q: What warranty covers these pre-tested modules?
A: Every ( / RH916TA) 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: Direct OEM 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 digital output and valve control loops immediately at a fraction of the cost.
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