Description

The RH914TR is a Foxboro FBM217 (Fieldbus Module) designed as a 32-channel discrete input module. This module is part of the Foxboro Evo™ process automation system and is engineered to reliably interface with and monitor the status of various digital field devices, providing crucial real-time information to the control system.

Application Scenarios

Consider a large-scale water treatment facility where numerous digital signals need to be monitored, such as the on/off status of pumps, the open/closed state of valves, and the activation of level switches across the plant. The Foxboro RH914TR module serves as a vital interface in this scenario. Installed within the Foxboro Evo™ system, it receives these discrete signals from the field devices, allowing the central control system to have a comprehensive overview of the plant’s operational status. This real-time monitoring enables operators to make informed decisions, automate processes based on digital inputs, and quickly respond to any changes or alarms within the water treatment facility, ensuring efficient and safe operation.

Parameter

Main Parameters Value/Description Product Model RH914TR Manufacturer Foxboro (by Schneider Electric) Product Category Discrete Input Module (Fieldbus Module – FBM217) Number of Input Channels 32 – Provides a high density of digital input points. Input Type Discrete (Digital) – Designed to receive on/off signals from field devices. Isolation Group Isolated Channels – Enhances system reliability by preventing fault propagation between channels. Communication Protocol Module Fieldbus – Integrates seamlessly with the Foxboro Evo™ system network. Operating Voltage Typically 24 V DC (confirm with specific termination assembly) Input Filter Time Configurable – Allows adjustment for noisy input signals. Fail-Safe Configuration Configurable – Defines the output state in case of module or communication failure. Termination Assembly Dependent – Requires a specific termination assembly (TA) for field wiring.

Technical Principles and Innovative Values

• Innovation Point 1: High-Density Input Channels. The RH914TR offers 32 discrete input channels in a single module, providing a cost-effective and space-saving solution for monitoring a large number of digital signals.
• Innovation Point 2: Channel Isolation. The isolated input channels enhance the robustness of the control system by preventing electrical faults on one channel from affecting other channels or the module itself.
• Innovation Point 3: Seamless Foxboro Evo™ Integration. As a native FBM within the Foxboro Evo™ system, the RH914TR benefits from seamless communication and configuration within the integrated control environment.
• Innovation Point 4: Configurable Input Filtering and Fail-Safe. The ability to configure input filter times helps to manage noisy field signals, ensuring reliable data acquisition. The configurable fail-safe behavior allows users to define the system’s response in case of module issues, enhancing safety and control.

Application Cases and Industry Value

In a large oil refinery, numerous discrete signals from field instruments like pressure switches, flow switches, and emergency shutdown buttons need to be continuously monitored by the distributed control system (DCS). The Foxboro RH914TR modules are deployed throughout the refinery’s process units to interface with these digital devices. The high channel density of the RH914TR reduces the number of modules required, simplifying the hardware architecture and reducing cabinet space. The isolated channels ensure that a fault in one field device does not impact the monitoring of other critical safety interlocks. The seamless integration with the Foxboro Evo™ DCS allows for easy configuration and access to the status of all digital inputs by the control operators, contributing to enhanced process safety and operational efficiency within the refinery.

Related Product Combination Solutions

1. Foxboro Evo™ System Hardware (e.g., Controllers, I/O Subsystems): The RH914TR is designed to operate within the Foxboro Evo™ distributed control system.
2. Foxboro Termination Assemblies (TAs): Specific TAs are required to provide the physical connection points for the field wiring to the RH914TR module. Different TAs may offer features like high-voltage attenuation and optical isolation.
3. Foxboro Fieldbus Communication Modules (FBMs) for Outputs (e.g., RH914XS): To control digital output devices, other Foxboro FBMs like discrete output modules would be used alongside the RH914TR.
4. Foxboro Power Supplies: Reliable power supplies are essential for the proper operation of the RH914TR and the entire Foxboro Evo™ system.
5. Foxboro System Configuration Software: The Foxboro system software is used to configure and manage the RH914TR module, including setting input filters and fail-safe parameters.
6. Digital Field Devices (e.g., Proximity Switches, Limit Switches, Valves with Digital Feedback): These are the devices that provide the discrete input signals to the RH914TR module.
7. Foxboro Analog Input Modules (e.g., RH926EQ): For monitoring analog signals (e.g., temperature, pressure), Foxboro offers various analog input FBMs that can be used in conjunction with the RH914TR.
8. Foxboro Safety Instrumented System (SIS): In safety-critical applications, dedicated Foxboro SIS modules might be used for safety-related digital inputs, potentially alongside the RH914TR for non-safety-critical monitoring.

Installation, Maintenance, and Full-Cycle Support

Installation of the RH914TR involves securely mounting it within the Foxboro Evo™ I/O subsystem and correctly wiring the field devices to the appropriate termination assembly connected to the module. Proper grounding and adherence to wiring diagrams are crucial. Configuration of the module’s parameters, such as input filtering and fail-safe settings, is done through the Foxboro system configuration software. Routine maintenance typically involves periodic visual inspections of the module and wiring for any signs of damage or loose connections. Foxboro (Schneider Electric) provides comprehensive documentation, including module-specific manuals and system installation guides. Their global support network offers extensive technical assistance, training programs, and spare parts availability to ensure the long-term reliability and performance of the Foxboro Evo™ system and its modules like the RH914TR.