Introduction

Discrete signals are fundamental to industrial process automation. A plant may rely on hundreds or thousands of binary signals to determine whether pumps are running, valves are open, motors are available, switches have operated, or alarms have been triggered.

The Foxboro FBM219 P0916RH addresses this requirement by combining a substantial number of discrete input and output points in a single interface module. With 24 discrete inputs and 8 discrete outputs, it can support both field-status monitoring and discrete control functions without requiring separate modules for every signal category.

This combined architecture can be especially valuable in process facilities where cabinet space and I/O density are important design considerations. Instead of distributing relatively small groups of discrete signals across multiple hardware points, engineers can consolidate compatible field circuits through the FBM219.

The module also provides configurable input filtering, allowing the system to accommodate different characteristics of field contacts and switching devices. Proper filtering can be important for maintaining stable status indications in applications involving mechanical contacts.

Another important consideration is field termination. The FBM219 works with associated termination assemblies that determine how different field signal types are connected. This approach gives system designers greater flexibility when integrating discrete circuits with different voltage requirements.

For plant engineers, DCS integrators, and maintenance professionals, the FBM219 P0916RH offers a compact, high-density approach to discrete I/O management within a Foxboro control-system environment.

Technical Specifications

Parameter	Specification
Brand	Foxboro
Model	FBM219
Part Number	P0916RH
Product Type	Discrete I/O Interface Module
System	Foxboro I/A Series
Discrete Inputs	24
Discrete Outputs	8
Total Discrete I/O Points	32
Input Architecture	Group Isolated
Input Filtering	Configurable
Input On-State Voltage	15–30 V DC for the applicable low-voltage configuration
Input Off-State Voltage	0–5 V DC for the applicable low-voltage configuration
Typical Input Current	2.2 mA at 30 V DC
Maximum Output Applied Voltage	60 V DC
Maximum Output Load Current	0.25 A
Mounting	FBM Baseplate / DCS I/O Architecture
Dimensions	114 × 45 × 104 mm
Weight	0.28 kg (0.63 lb)

The FBM219 P0916RH has a module height of approximately 102 mm, increasing to 114 mm including mounting lugs, with a width of 45 mm and depth of 104 mm.

The module weight is specified at approximately 0.284 kg, which is 0.28 kg (0.63 lb) when rounded to two decimal places.

The exact field-voltage capability depends on the associated termination assembly. Therefore, the termination assembly should always be selected according to the actual field signal requirements rather than treating the FBM219 alone as the complete field-interface solution.

Recommended Related Models

For Foxboro DCS installations requiring complementary I/O functions, the following models can be considered alongside the FBM219 P0916RH:

Model	Product Type	Typical Application
Foxboro FBM217	Discrete Input Interface Module	Discrete field-status acquisition
Foxboro FBM216b	HART Communication Input Module	HART-enabled analog instrumentation
Foxboro FBM201	Analog Input Module	Analog process measurement
Foxboro FBM202	Analog Output Module	Analog control-loop signals
Foxboro FBM204	Discrete Output Module	Discrete equipment control

For applications requiring both discrete monitoring and discrete control in one module, the FBM219 offers a particularly efficient alternative to using separate input and output modules.

Popular Related Models

The following Foxboro FBM products are also relevant to industrial DCS and field-interface projects:

Model	Product Type	Typical Application
Foxboro FBM201	Analog Input Module	Process variable acquisition
Foxboro FBM202	Analog Output Module	Analog control and actuator signals
Foxboro FBM203	Discrete Input Module	Equipment status and alarm monitoring
Foxboro FBM204	Discrete Output Module	Discrete field-device control
Foxboro FBM216b	HART Communication Input Module	Intelligent field instrumentation
Foxboro FBM217	Discrete Input Interface Module	Discrete signal monitoring
Foxboro FBM219	Discrete I/O Interface Module	Combined discrete input and output applications

The Foxboro FBM219 P0916RH Discrete I/O Interface Module is a strong fit for process automation projects that require high-density discrete signal handling. Its combination of 24 inputs, 8 outputs, configurable filtering, and group-isolated architecture provides a practical solution for equipment monitoring, alarms, interlocks, sequencing, and discrete control within Foxboro DCS installations.

Applications

The Foxboro FBM219 P0916RH Discrete I/O Interface Module is a high-density field interface designed for industrial distributed control systems where both discrete input monitoring and discrete output control are required. It combines multiple discrete channels in a compact FBM platform, helping process plants reduce cabinet complexity while maintaining organized field connectivity.

The module is suitable for applications across oil and gas, chemical processing, refining, power generation, water treatment, and other continuous-process industries. Typical signals include equipment status, valve position, alarm contacts, motor feedback, permissives, interlocks, and discrete control commands.

The FBM219 supports 24 discrete input channels and 8 discrete output channels, making it particularly useful when a project requires a combination of monitoring and control points within the same I/O module.

Its group-isolated architecture also makes it appropriate for industrial environments where electrical isolation and dependable signal handling are important considerations.

High-Density I/O for Demanding Process Applications

High Channel Density

The FBM219 combines 24 discrete inputs with 8 discrete outputs, allowing a large number of binary field signals to be handled within a single module footprint.

Flexible Discrete Signal Interface

Associated termination assemblies can support different field signal arrangements, allowing the FBM219 to be adapted to a variety of industrial discrete I/O applications.

Group-Isolated I/O

The module uses group isolation to help separate field circuits from the internal control-system electronics and reduce the potential impact of electrical interference.

Configurable Input Filtering

Selectable input filtering can help prevent unwanted switching caused by contact bounce or short-duration signal disturbances, providing cleaner status information to the control system.

Practical for High-Density Cabinets

By combining input and output functionality, the FBM219 can help system designers use cabinet space more efficiently, particularly in large installations with substantial numbers of discrete signals.

Suitable for Industrial DCS Environments

The module is designed for Foxboro distributed control architectures and can be used in demanding process applications where reliable field signal acquisition and control are essential.

Maintenance-Friendly Architecture

A clearly structured discrete I/O arrangement simplifies signal identification and can help technicians perform commissioning, loop checks, and troubleshooting more efficiently.

Technical FAQs

1. What is the primary function of the Foxboro FBM219 P0916RH?

The FBM219 P0916RH is a discrete I/O interface module that combines discrete input and output functions for Foxboro distributed control systems. It provides 24 discrete inputs and 8 discrete outputs.

2. How many I/O channels does the FBM219 provide?

The module provides 24 discrete input channels and 8 discrete output channels, giving it a total of 32 discrete I/O points.

3. What types of signals can be connected to the FBM219?

Depending on the associated termination assembly, the FBM219 can interface with different industrial discrete signal arrangements, including low-voltage DC and higher-voltage AC/DC field circuits.

4. Are the FBM219 inputs isolated?

The I/O architecture provides group isolation, helping protect the control-system electronics from electrical conditions associated with the field circuits and improving signal integrity in industrial environments.

5. Can the FBM219 be used for both monitoring and control?

Yes. Its 24 discrete inputs can be used for monitoring equipment and process states, while the 8 discrete outputs can be used for compatible control functions.

6. What is the purpose of input filtering?

Input filtering helps prevent short-duration disturbances and contact bounce from being interpreted as unwanted state changes. The appropriate filtering value depends on the field device and application.

7. What should be checked if an input channel does not change state correctly?

Check the field device, field power, wiring continuity, termination assembly, signal voltage, channel configuration, and DCS indication. The associated termination hardware should also be inspected for incorrect or loose connections.

8. What should be considered when using the discrete outputs?

The connected load, field voltage, output current requirements, termination assembly, protection arrangement, and required fail-state behavior should be verified before connecting an output to a field device.

9. Can the FBM219 be used with existing Foxboro I/A Series systems?

Yes, the FBM219 is designed for Foxboro I/A Series distributed control applications. However, the specific baseplate, termination assembly, fieldbus architecture, and software configuration should be verified before installation.

10. What should be checked when replacing a P0916RH module?

Confirm the complete part number, FBM219 model, I/O channel requirements, associated termination assembly, field wiring, baseplate compatibility, system configuration, and applicable hardware revision. A similar-looking discrete I/O module should not automatically be treated as a direct replacement.

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