Description
Core Product Summary
The Foxboro FBM242 (referenced with part variant RH916TA) is a 16-channel discrete output fieldbus module designed for the Foxboro I/O Series and EcoStruxure Foxboro Distributed Control System (DCS) architectures. It is engineered to accept control logic from system processors and drive up to sixteen externally powered discrete output points, handling loads such as solenoid valves, indicator lights, and control relays.
The module executes ladder logic or discrete output programs locally, supporting external field power supplies ranging from 15 to 60 V DC. Communication with system control processors is managed across a redundant 2 Mbps HDLC fieldbus network. Built into a compact extruded aluminum housing, the FBM242 provides robust channel isolation and high-density point management for complex industrial control facilities.
Key Technical Specifications
| Specification Parameter | Verified Value / Detail |
| Product Type | 16-Channel Externally Powered Discrete Output Module |
| System Family | Foxboro I/O Series / EcoStruxure Foxboro DCS (Compact 200 Series I/O) |
| Output Channels | 16 discrete output channels (externally sourced) |
| Operating Voltage Range | 15 to 60 V DC (externally supplied field power) |
| Maximum Load Current | Up to 2.25 A maximum per channel (total current limits apply per group) |
| Module Power Supply Input | Redundant 24 V DC (+5%, -10%) |
| Power Consumption / Dissipation | 3 W maximum consumption / 6.5 W maximum heat dissipation |
| Channel Isolation | Galvanic isolation rated to withstand 600 V AC for 1 minute between channels and ground |
Detailed Product Overview
The Foxboro FBM242 acts as a high-capacity discrete output node linking controller commands directly to plant floor actuators. Each of the 16 channels processes individual switching commands, relying on external power networks to energize connected field loads while maintaining strict electrical separation from internal base bus logic.
System configuration options—such as fail-safe fallback states, input/output filtering periods, and sustained or momentary output behaviors—are defined through the host engineering environment. Physical installation relies on a modular baseplate structure that accommodates redundant 24 V DC power feeds and dual-pathed 2 Mbps fieldbus communication. Conformal coating and ruggedized structural design allow the module to maintain stable performance in harsh environments up to ISA Standard S71.04 Class G3.
FBM242 RH916TA
FBM242 RH916TA
System Compatibility & Integration Requirements
| Item / Dependency | Verified Compatibility or Requirement | Practical Note |
| Control System Platform | EcoStruxure Foxboro DCS / I/A Series | Requires system software supporting Compact 200 Series I/O subsystems. |
| Mounting Infrastructure | Compact 200 Series 16-Slot Horizontal Baseplate | Installs into baseplate slots supporting redundant power and dual 2 Mbps fieldbus lines. |
| Termination Assemblies (TAs) | DIN-rail mounted TAs (Compatible with compression screw or relay blocks) | Interfaced via Type 4 or Type 4H subsystem transition cables up to 30 meters long. |
| Environmental Enclosure | Certified for harsh environments up to ISA Standard S71.04 Class G3 | Housed in durable extruded aluminum suited for industrial electrical cabinets. |
Dimensions, Mounting & Connection Notes
- Module Dimensions: Height: 102 mm (4 in) [114 mm with mounting lugs]; Width: 45 mm (1.75 in); Depth: 104 mm (4.11 in).
- Unit Mass: Approximately 284 g (10 oz).
- Mounting Configuration: Snaps onto modular baseplates mounted on horizontal or vertical 35 mm DIN rails, or 19-inch racks.
- Field Termination: Connects to a separate DIN-rail mounted Termination Assembly via a 37-pin D-subminiature multi-core subsystem cable.
- Hot-Swapping Provision: Engineered to permit live module extraction and insertion under power on active baseplates without interrupting field-side wiring or network trunks.
FAQ
What is the Foxboro FBM242?
The Foxboro FBM242 is a 16-channel discrete output fieldbus module designed to control externally powered field devices such as solenoids and indicators within Foxboro distributed control systems.
What is the purpose of the RH916TA designation?
RH916TA serves as the specific factory part identification code for this configuration of the FBM242 module within the Foxboro hardware catalog.
What field power voltages are supported by the module?
The output channels accept external field power supplies ranging from 15 to 60 V DC.
Are the output channels isolated from each other?
Yes, each output channel is galvanically isolated from other channels and system ground, with an isolation rating of 600 V AC applied for one minute.
Can the FBM242 module be replaced while the process is running?
Yes, the module supports online hot-swapping, allowing technicians to replace a unit under power without disconnecting field termination cables or network communications.
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