Foxboro FBM218 P0917XV Discrete Output Interface Module

Model: FBM218 P0917XV

Brand: Foxboro

Type: Discrete Output Interface Module

System: I/A Series Distributed Control System (DCS)

Output Channels: Typically equipped with multiple isolated output channels, enabling independent control of multiple discrete devices (e.g., relays, contactors, indicator lights) to achieve on/off control of various equipment in industrial processes.

Signal Output: Capable of outputting standard digital signals to drive external devices. For example, high/low level signals control relay engagement/release to Start and stop motors, valves, and other equipment.

Electrical Isolation: Provides electrical isolation to separate the control system's internal circuits from external field devices, preventing external interference from entering the control system and avoiding control system failures from affecting field devices, thus enhancing system stability and reliability.

Diagnostic Function: Supports self-diagnosis, real-time monitoring of operating status (e.g., detecting output channel short circuits, open circuits, etc.), and feedback of fault information to the control system for timely maintenance.

Output Channel Characteristics

Power Parameters

Communication Interface: Redundant 2Mbps module fieldbus (dual paths A/B)

Communication Protocol: Supports Foxboro I/A Series standard protocol, compatible with real-time data interaction and fault diagnosis

Data Transmission: Enables bidirectional transmission of digital output values, fault status, and configuration parameters

Physical Dimensions

Weight: Approximately 0.5kg

Environmental Requirements

Output Modes

Diagnosis & Protection

Redundancy & Hot Swap

Digital Signal Reception: Receives digital control signals from the control processor or other upper computers via the communication interface. These signals are represented in binary code, indicating the desired state (e.g., "0" for OFF, "1" for ON) of each output channel.

Signal Decoding & Processing: The module's internal microprocessor decodes and processes received digital signals, converting them into corresponding control signals for output channels, determining which channels to activate or deactivate.

Electrical Isolation & Driving: Decoded signals are isolated by electrical isolation circuits to protect the control system from external electrical interference and faults, then amplified by driving circuits to power external discrete devices (e.g., driving relay coils to close/open contacts and control external equipment power).

Output Status Feedback & Diagnosis: The module real-time monitors output channel status to ensure consistency with control commands. If anomalies (e.g., short circuits, open circuits, equipment faults) are detected, it feeds back fault information to the control system for diagnosis and handling, and may automatically set output channels to a safe state to prevent equipment damage or process hazards.

In chemical production: Controls valve opening/closing on material conveying pipelines and start/stop of reactor agitator motors.

In power systems: Controls circuit breaker switching and disconnector operations.