Foxboro 871CC-A2-4 Central control module

Foxboro Output Modules Overview

Foxboro (now part of Schneider Electric) offers a variety of output modules for its Distributed Control Systems (DCS), Programmable Logic Controllers (PLCs), and other industrial automation systems. These modules convert the control system's logic signals into the electrical signals required by field devices such as valves, actuators, relays, and indicator lights.

Product Detailed Description

• Function:

• Receives digital or analog control signals from the control system (e.g., DCS controller, PLC CPU).

• Converts these control signals into electrical signals usable by field devices (e.g., 4-20 mA analog current, 24 V DC digital signals, relay contacts).

• Provides the interface to field devices to implement process control and equipment operation.

• Some modules may include diagnostic functions to monitor output status and detect faults.

• Isolation may be provided to protect the control system from electrical interference from field devices.

• Features:

• Wide selection of module types and channel densities to meet different application needs.

• Supports various output signal types (analog current, analog voltage, digital output, relay output).

• High reliability and robust industrial design for harsh environments.

• Hot-swappable capability (in some models) allows module replacement without system shutdown.

• Integrated diagnostic functions for easy troubleshooting and maintenance.

• Configurable parameters to adapt to different field device requirements.

Product Parameters

As Foxboro offers a wide variety of output modules, the following are some general parameters. Always refer to the official datasheet for the specific model:

• Number of Output Channels:

• E.g., 8 channels, 16 channels, 32 channels, etc.

• Output Signal Type:

• Analog Output: 4-20 mA, 0-10 V DC, -10 V to +10 V DC, etc.

• Digital Output: 24 V DC, 48 V DC, 110 V DC, 24 V AC, Relay Contacts (Normally Open/Normally Closed).

• Output Current/Voltage Range:

• E.g., maximum load resistance for analog output, maximum current for digital output.

• Isolation Voltage:

• Electrical isolation voltage between the control side and the field side.

• Accuracy (Analog Output):

• E.g., ±0.1% of full scale.

• Resolution (Analog Output):

• E.g., 12-bit, 16-bit.

• Response Time:

• Delay time for the output signal to change.

• Supply Voltage:

• Power supply voltage required by the module (e.g., 24 V DC).

• Operating Temperature:

• Permissible ambient temperature range for the module.

• Degree of Protection (IP):

• E.g., IP20.

• Connection Method:

• E.g., screw terminals, spring terminals, connectors.

Product Advantages

• High Reliability:

• Foxboro products are known for their reliability in demanding industrial environments.

• Wide Selection:

• Extensive range of module types and specifications to meet various application needs.

• Easy Integration:

• Seamless integration with Foxboro control systems.

• Powerful Diagnostic Functions:

• Helps users quickly identify and resolve issues.

• Increased System Availability:

• Hot-swappable functionality (in some models) reduces system downtime.

• Flexibility:

• Configurable output parameters to adapt to different field devices.

Precautions

• Correct Selection:

• Choose the appropriate output module model based on the type of field device, signal requirements, and system needs.

• Correct Installation:

• Follow Foxboro's installation manual to ensure the module is securely mounted and correctly connected.

• Correct Wiring:

• Connect the control system and field devices correctly according to the wiring diagram, ensuring correct polarity and secure connections.

• Power Requirements:

• Ensure that the power supply provided to the module meets the specifications.

• Environmental Conditions:

• Ensure that the operating environment temperature, humidity, etc., meets the module's requirements.

• Load Characteristics:

• Ensure that the electrical characteristics (e.g., voltage, current, impedance) of the connected field devices are within the module's allowable range.

• Maintenance:

• Regularly check the module's connections and status to ensure proper operation.

Product Applications

Foxboro output modules are widely used in various industrial automation fields, including but not limited to:

• Process Control:

• Controlling valves and actuators to regulate flow, pressure, temperature, and other process parameters.

• Controlling heaters and coolers.

• Discrete Control:

• Controlling motor starters, contactors, and relays.

• Controlling indicator lights and alarms.

• Safety Systems:

• Driving safety-related actuators (e.g., safety valves).

• Emergency Shutdown (ESD) Systems:

• Outputting signals to trigger emergency shutdown actions.

• Factory Automation:

• Controlling various automated equipment and machinery.