Foxboro FBM211 Input Interface Module

Overview

The Foxboro FBM211 is a high-performance 0 to 20 mA input interface module designed for seamless integration with fieldbus systems. It features sixteen independent 20 mA analog input channels, each supporting a 2-wire analog sensor input, such as a 4 to 20 mA transmitter or a self-powered 20 mA source. This module offers galvanic isolation from ground and logic, ensuring safe and reliable operation in demanding industrial environments. It converts electrical input signals from field sensors to be compatible with a redundant fieldbus module, making it ideal for diverse automation applications.

Key Features

16 Independent Channels: The Foxboro FBM211 provides 16 isolated input channels, offering flexibility for various sensor types.
Galvanic Isolation: Each input channel is isolated from ground and module logic, preventing interference and ensuring safe operation.
High Accuracy: The module offers ±0.03% of span accuracy for precise data collection and system performance.
Wide Input Range: It supports input signals from 0 to 20.4 mA DC, with each channel limited to 33 mA, ensuring compatibility with various sensors.
Signal Conversion: Each channel utilizes a multiplexed sigma-delta converter for efficient A/D signal conversion, enhancing measurement precision.
Software Configurable Integration: The integration period is software-configurable to suit different operational needs.
Excellent Noise Rejection: With >100 dB common mode rejection and >35 dB normal mode rejection, the module minimizes signal interference from electrical noise.
Durable Construction: It is built to withstand harsh industrial environments, offering reliability in demanding conditions.

Technical Specifications

Specification	Value
Input Range	0 to 20.4 mA DC
Number of Channels	16 Independent Channels
Accuracy	±0.03% of Span
Temperature Coefficient	+50 ppm/°C
A/D Conversion Type	Multiplexed Sigma-Delta Converter
Integration Period	Software Configurable
Common Mode Rejection	>100 dB at 50 or 60 Hz
Normal Mode Rejection	>35 dB at 50 or 60 Hz
Input Channel Impedance	61.9 Ω Nominal
Input Voltage Range (Redundant)	24 V DC ±5%, -10%
Power Consumption	7 W Maximum at 24 V DC
Heat Dissipation	3 W Maximum at 24 V DC
Operating Temperature	-20°C to +70°C (-4°F to +158°F)
Storage Temperature	-40°C to +70°C (-40°F to +158°F)
Relative Humidity	5% to 95% (Non-condensing)
Altitude (Operating)	-300 to +3,000 m (-1,000 to +10,000 ft)
Altitude (Storage)	-300 to +12,000 m (-1,000 to +40,000 ft)
Vibration Resistance	0.75 m/s² (5 to 500 Hz)
Environment Rating	Class G3 (Harsh) – ISA Standard S71.04

Applications

The Foxboro FBM211 is ideal for a wide range of industrial applications, including:

Process Control: Reliable for continuous monitoring and control of process variables across multiple sensor inputs.
Manufacturing Automation: Ensures seamless communication between field sensors and control systems in automated manufacturing environments.
Building Automation: Integrates with building management systems to control HVAC, lighting, and energy management systems.
Oil & Gas: Facilitates accurate monitoring of equipment and environmental conditions in oil and gas production facilities.

Conclusion

The Foxboro FBM211 is a versatile and reliable input interface module offering high accuracy, robust noise rejection, and galvanic isolation. With 16 independent channels, it serves as a critical component in various automation and control systems. Whether in process control, manufacturing automation, or building systems, the Foxboro FBM211 provides the precision and durability necessary for demanding industrial environments.