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FMB242

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FMB242
May 13, 2026

FMB242

1. Technical Specifications The FBM242 (Part Number: P0916TA) is a high-reliability discrete output module for Foxboro I/A Series DCS systems, equipped with a high-performance industrial processor that ensures stable data processing and transmission. It features a rugged extruded aluminum housing, complying with ISA standard S71.04 and providing up to Class G3 (harsh environment) protection, suitable for operation in high-dust, high-humidity and strong electromagnetic interference industrial sites. The FBM242 supports hot-swap replacement without power interruption, with multiple front-panel LED indicators for real-time monitoring of module operation status and each output channel's discrete state. For technical parameters: it has 16 isolated discrete output channels, supporting external power supply, compatible with 15-60V DC, 120V AC/125V DC, 240V AC voltage signals; each channel has a maximum output current of 2.25A, a surge current of up to 8A (20ms at 30°C), a maximum on-state voltage drop of 0.2V and a maximum off-state leakage current of 0.1mA. It operates on a 24V DC redundant power supply with a single module power consumption ≤3W (maximum heat dissipation 6.5W when all outputs are 1.5A), suitable for standard baseplate installation. Its operating temperature ranges from -20°C to +70°C, storage temperature from -40°C to +70°C, humidity tolerance of 5%-95% non-condensing, and can operate at altitudes from -300 to +3000m. The module weighs about 284g, with dimensions of 102mm (height, 114mm including mounting ears) × 45mm (width) × 104mm (depth).

Description


1. Technical Specifications

The FBM242 (Part Number: P0916TA) is a high-reliability discrete output module for Foxboro I/A Series DCS systems, equipped with a high-performance industrial processor that ensures stable data processing and transmission. It features a rugged extruded aluminum housing, complying with ISA standard S71.04 and providing up to Class G3 (harsh environment) protection, suitable for operation in high-dust, high-humidity and strong electromagnetic interference industrial sites.
The FBM242 supports hot-swap replacement without power interruption, with multiple front-panel LED indicators for real-time monitoring of module operation status and each output channel's discrete state.

1.1 Electrical Parameters

  • Channels: 16 isolated discrete output channels

  • External Power Supply Compatibility: 15-60V DC, 120V AC/125V DC, 240V AC voltage signals

  • Maximum Output Current per Channel: 2.25A

  • Surge Current: Up to 8A (20ms at 30°C)

  • Maximum On-state Voltage Drop: 0.2V

  • Maximum Off-state Leakage Current: 0.1mA

  • Power Supply: 24V DC redundant power supply

  • Power Consumption: ≤3W per module (maximum heat dissipation 6.5W when all outputs are 1.5A)

1.2 Environmental & Mechanical Parameters

  • Mounting: Standard baseplate installation

  • Operating Temperature: -20°C to +70°C

  • Storage Temperature: -40°C to +70°C

  • Humidity Tolerance: 5%-95% non-condensing

  • Operating Altitude: -300 to +3000m

  • Weight: Approximately 284g

  • Dimensions: 102mm (height, 114mm including mounting ears) × 45mm (width) × 104mm (depth)

2. Product Overview

The FBM242 (Part Number: P0916TA) is a dedicated discrete output module designed for Foxboro I/A Series Distributed Control Systems (DCS), developed to provide reliable and efficient discrete signal output control in industrial automation scenarios. As a core component of the I/A Series DCS, this module integrates high-performance processing, robust environmental adaptability, and user-friendly operation, making it widely applicable to various harsh industrial environments such as petrochemical, power generation, metallurgy, and chemical processing.
The module is engineered to bridge the gap between the DCS control system and on-site executive components (such as relays, contactors, solenoid valves, and indicator lights), converting digital control signals from the DCS into stable discrete output signals to drive on-site equipment. Its isolated channel design effectively prevents electromagnetic interference between channels and external circuits, ensuring the accuracy and stability of output signals even in complex industrial electromagnetic environments.
With a focus on reliability and maintainability, the FBM242 adopts a modular design and supports hot-swap replacement, allowing maintenance personnel to replace the module without interrupting the operation of the entire DCS system, thereby minimizing system downtime and improving production continuity. The rugged extruded aluminum housing and Class G3 harsh environment protection ensure the module can operate stably in high-dust, high-humidity, and strong electromagnetic interference environments, meeting the strict requirements of industrial field applications.

3. Functional Features

3.1 High Reliability and Stability

Equipped with a high-performance industrial-grade processor, the FBM242 ensures fast and stable data processing and signal transmission, with strong anti-interference capability to avoid signal distortion or loss caused by industrial on-site interference. The isolated design of each output channel (optical isolation) effectively isolates the module’s internal circuit from external on-site circuits, preventing mutual interference between channels and improving the overall reliability of the module. The rugged extruded aluminum housing complies with ISA standard S71.04 and achieves Class G3 harsh environment protection, effectively resisting dust, moisture, and electromagnetic interference, ensuring long-term stable operation in harsh industrial environments.

3.2 Hot-Swap Replacement

The FBM242 supports hot-swap replacement, which means the module can be installed or removed without shutting down the DCS system or cutting off the power supply. This feature greatly simplifies maintenance work, reduces system downtime caused by module failure or maintenance, and improves the continuity and availability of the entire control system. During hot-swap, the DCS system will automatically detect the module’s status and switch to a backup mode if necessary, ensuring that the control logic is not interrupted.

3.3 Real-Time Status Monitoring

The front panel of the FBM242 is equipped with multiple LED indicators, providing real-time visual feedback on the module’s operation status and each output channel’s discrete state. Specifically, there are indicators for power supply status (power on/off), module fault status (normal/fault), and each output channel’s status (on/off). This allows on-site maintenance personnel to quickly check the module’s working condition and locate faults (such as channel failure, power supply abnormality) without the need for professional testing equipment, improving maintenance efficiency.

3.4 Wide Voltage Compatibility

The FBM242 supports a wide range of external power supply voltages, including 15-60V DC, 120V AC/125V DC, and 240V AC, making it compatible with various on-site power supply systems and executive components. This wide voltage compatibility enhances the module’s versatility and applicability, allowing it to be used in different industrial scenarios without the need for additional voltage conversion equipment.

3.5 Redundant Power Supply Support

The module adopts a 24V DC redundant power supply design, which means it can be connected to two independent 24V DC power supplies. When one power supply fails, the other power supply will automatically take over, ensuring that the module continues to operate normally without interruption. This redundant design further improves the reliability of the module and avoids system downtime caused by power supply failure.

4. Installation Instructions

4.1 Installation Preparation

4.1.1 Tools and Materials Required

  • Standard screwdriver (flathead and Phillips)

  • Wire stripper

  • Crimping tool (for terminal connections)

  • Insulating tape

  • FBM242 module (P0916TA)

  • Standard baseplate (compatible with Foxboro I/A Series DCS)

  • Power supply cables (24V DC redundant power supply)

  • Signal cables (for connecting output channels to on-site executive components)

4.1.2 Pre-Installation Check

  • Check the module’s part number (P0916TA) and model (FBM242) to ensure it matches the required specifications.

  • Inspect the module’s housing for damage, scratches, or deformation; check the front-panel LED indicators for completeness.

  • Verify that the baseplate is compatible with the FBM242 module and is securely installed on the DIN rail.

  • Check the power supply voltage (24V DC) to ensure it meets the module’s requirements; confirm that the power supply is stable and free of interference.

  • Inspect the signal cables and power supply cables for damage, and ensure the cable specifications match the module’s current and voltage requirements.

4.2 Installation Steps

  1. Mount the Baseplate: Install the standard baseplate on the DIN rail (complying with IEC 60715) in the control cabinet. Ensure the baseplate is securely fixed, with no looseness. The installation position should be well-ventilated, away from heat sources (such as power modules) and high-voltage components, to avoid affecting the module’s heat dissipation and operation.

  2. Connect Cables to the Baseplate: Before installing the module, connect the power supply cables and signal cables to the corresponding terminals on the baseplate.

    1. Power Supply Connection: Connect the 24V DC redundant power supply cables to the "Power In" terminals (positive and negative poles must be correctly connected, do not reverse).

    2. Signal Connection: Connect the signal cables from the on-site executive components (relays, contactors, etc.) to the 16 discrete output channel terminals on the baseplate. Each channel corresponds to a set of terminals; ensure the wiring is correct and tight, and use insulating tape to wrap the connection points to prevent short circuits.

  3. Install the FBM242 Module: Align the module’s bottom slot with the baseplate’s guide rail, and push the module downward until it clicks into place (indicating that the module is securely connected to the baseplate). Ensure the module is tightly fitted with the baseplate, with no gaps or looseness. If hot-swap is required, ensure the DCS system is in a stable operating state before installing the module.

  4. Post-Installation Check:

    1. Turn on the 24V DC redundant power supply, and check the front-panel power indicator of the module (should be on, indicating normal power supply).

    2. Check the module’s fault indicator (should be off, indicating no fault).

    3. Send a test signal from the DCS system to each output channel, and check the corresponding channel LED indicator (should be on when the channel is activated, off when deactivated) to confirm that the signal transmission is normal.

    4. Check the on-site executive components to ensure they can be normally driven by the module’s output signal.

4.3 Installation Notes

  • The module must be installed by professional maintenance personnel who are familiar with Foxboro I/A Series DCS systems to avoid incorrect installation leading to module damage or system failure.

  • During installation, ensure the power supply is turned off (except for hot-swap operations) to prevent electric shock or short circuits.

  • The wiring must be correct and tight; incorrect polarity (especially for power supply cables) will damage the module.

  • The module’s installation position must ensure good heat dissipation; avoid installing it in a sealed space or near heat sources, as excessive temperature will affect the module’s performance and service life.

  • After installation, conduct a comprehensive test to confirm that the module is operating normally and the signal transmission is stable before putting it into formal use.

  • When replacing the module (hot-swap), ensure the new module is of the same model (FBM242, Part Number: P0916TA) to avoid incompatibility issues.

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