Foxboro FBM228 Foundation Fieldbus Communication Module

The FOUNDATION™ Fieldbus Redundant Module (FBM228) is a high-capacity interface designed to connect FOUNDATION fieldbus (FF) devices to Foxboro™ Distributed Control Systems (DCS). It can operate in both single and redundant configurations, supporting up to four H1 Links, which allows for a maximum of 64 fieldbus devices.

Key Features:

• FOUNDATION Fieldbus Support: Complies with FOUNDATION fieldbus specifications, supporting H1 devices registered with the Interoperability Test Kit (ITK) 4.6 or greater.
• Device Integration: Facilitates access to device parameters and control resources such as AI, AO, DI, DO, PID, etc., for constructing control loops.
• Redundancy for High Availability: Can be installed in a redundant pair configuration, ensuring continuous operation with fault-tolerant control processors and redundant communications.
• Device Diagnostics: Provides enhanced diagnostic blocks (e.g., BIN, IIN, RIN, ROUT, PAKIN, STRIN) to gather device maintenance information and integrate it into alarm and maintenance strategies.
• Compatibility: Works with both standard and intrinsically safe power conditioners from Foxboro and third-party manufacturers.
• Modular Control System: Offers a flexible control setup, allowing the PID function to be located in either the field device or the host control station.

Functional Specifications:

• Communication Interface: Provides four isolated H1 Links, each with its own Link Active Scheduler (LAS).
• Bus Characteristics: Operates on a non-redundant multi-drop communications bus at 31.25 kbps with a bus/tree topology.
• Maximum Devices: Supports up to 64 devices per module and 16 devices per H1 Link.
• Bus Power: Power to the bus is managed by field termination assemblies and can be powered by various third-party power conditioners, with options for intrinsic safety.
• Control Loop Configuration: Supports a minimum macrocycle time of 200 ms and automatic adjustment for client/server communications.
• Power Requirements: Requires a 24 V dc input with a power consumption range from 3.8 W to 5.0 W depending on the model.

Regulatory Compliance:

• EMC: Meets European EMC Directive 2014/30/EU with emissions and industrial immunity standards.
• Safety: UL/UL-C listed for use in Class I, Division 2 environments and compliant with ATEX Zone 2 standards.
• RoHS Compliance: Fully compliant with the European RoHS Directive 2011/65/EU.

Environmental Specifications:

• Operating Temperature: Ranges from -20°C to +70°C for standard environments, and -40°C to +70°C for higher altitudes.
• Humidity: Operates in environments with 5 to 95% non-condensing humidity.
• Vibration Resistance: Can withstand vibrations up to 7.5 m/s².

Physical Specifications:

• Mounting: Can be mounted on a DIN rail or a 19-inch rack using a mounting kit.
• Weight: Approximately 284 g (10 oz) per module.
• Dimensions: 102 mm (height), 45 mm (width), and 104 mm (depth).
• Indicators: Features LEDs for operational status, role (master/tracker), and channel connection activity.

Power Options:

• The FBM228 integrates with various power conditioners for both intrinsically safe and non-intrinsically safe environments. Power options include models from Pepperl+Fuchs and Relcom. The system is also compatible with general-purpose power conditioners when combined with built-in field barriers for intrinsic safety.

Part Numbers:

• FBM228 Module:
  • RH101SF (supersedes RH973LB)
• Redundancy Adapter:
  • RH922RK

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