Description
Product Introduction & Engineering Value
I’ve used the FDC280 when a plant needed to pull large numbers of Ethernet or serial devices into the Foxboro system without loading traditional FBM cabinets. The RH101FQ module is a dual-core field-mounted controller. Core 1 runs the control software and Control Network communications. Core 2 handles device integration drivers so that Modbus TCP, Modbus RTU, EtherNet/IP, OPC UA, PROFINET, and other protocols can be processed without impacting the primary control execution.
The controller supports up to 256 field devices and thousands of soft I/O points. It connects to the Control Network through fiber or copper 100 Mbps Ethernet adapters on its dedicated baseplate. A single module can be used, or a fault-tolerant pair can be installed for continuous operation. Regulatory, logic, sequential, and alarm functions run locally in the field.
Technical Specifications
Processor: Dual-core ARM System-on-Chip (Control Core + I/O/Device Integration Core)
Configuration: Single module or fault-tolerant pair
Field Device Capacity: Up to 256 devices
Soft I/O / Block Capacity: Up to 8,000 soft I/O points; approximately 8,000 total blocks (see sizing guidelines)
Control Network: 100 Mbps Ethernet (fiber or copper adapters on baseplate)
Supported Drivers (examples): Modbus TCP, Modbus RTU Serial, EtherNet/IP, OPC UA Client, PROFINET, others via downloadable drivers
Power Supply: 24 V DC +5% / –10% (redundant capable)
Operating Temperature: –20 to +60 °C (–4 to +140 °F) typical
Mounting: Dedicated 2-position baseplate (RH101KF)
Module Dimensions (approx.): 105–116 mm H × 51.8 mm W × 147 mm D
Module Weight: Approx. 0.8 kg (single non-fault-tolerant module)
Field Application & The “Trench” Experience
A Midwest specialty chemical facility needed to integrate more than 100 Ethernet-based analyzers, package PLCs, and smart motor controllers into the Foxboro system. Traditional FBM counts would have required multiple additional cabinets. An FDC280 RH101FQ was installed with the appropriate network adapters and drivers. Device data was mapped into the control database, and local regulatory and sequential strategies ran on the FDC280. The dual-core design kept device scanning isolated from the primary control execution, and the system continued to operate during a later network maintenance window.
Typical niche applications:
- High-density integration of Ethernet and serial field devices (analyzers, package units, motor controllers) without large FBM counts
- Field-mounted control and device interfacing for remote process areas
- Fault-tolerant device integration and control for continuous processes that cannot tolerate controller failure
FDC280 RH101FQ
FDC280 RH101FQ
Transparency SOP: QA & Testing
- Visual inspection of module, connectors, network adapters, and original RH101FQ labeling
- Power-up on dual 24 V supplies with Control Network and internal core communication verification
- Basic control strategy load and execution test
- Device integration driver load and communication test with reference Ethernet or serial devices
- Fault-tolerant pair (when applicable) synchronization and switchover verification
- Extended burn-in while monitoring continuous control and device scanning performance
The Veteran’s Tech Trap Guide
⚠️ Use the correct baseplate and adapters. The FDC280 requires its dedicated baseplate (RH101KF) and the appropriate fiber (RH924WA) or copper (RH924UQ) network adapters. Installing it on a standard FBM or FCP baseplate will prevent proper operation.
PRO TIP: Keep device integration load on Core 2 within the published sizing guidelines. Overloading the I/O core with too many devices or high-frequency scans can impact overall performance even though the Control Core continues to run.
⚠️ Driver and device firmware must match. An incorrect or outdated protocol driver is the most common reason devices fail to exchange data even though the Ethernet or serial link is solid. Always verify the driver revision against the field device documentation.
Dynamic FAQ
Q: What is the primary advantage of the FDC280 RH101FQ over a traditional FCP? A: It provides direct high-capacity integration of Ethernet and serial field devices without requiring large numbers of traditional Fieldbus Modules, while still executing full process control strategies.
Q: Does the FDC280 support fault tolerance? A: Yes. A single module can be used, or a fault-tolerant pair can be installed on the dedicated baseplate for automatic switchover.
Q: How many field devices can one support? A: Up to 256 field devices, subject to performance and sizing guidelines (also limited by total soft I/O points and block count).
Q: What protocols can the run? A: Protocol support is provided by downloadable drivers. Common options include Modbus TCP, Modbus RTU, EtherNet/IP, OPC UA Client, and PROFINET.
Q: Are New Surplus RH101FQ units original Foxboro / Schneider Electric product? A: Yes. Units are original OEM material that have passed full functional, communication, device-integration, and (where applicable) fault-tolerant testing.
Q: What warranty is provided? A: 12-month warranty against defects in materials and workmanship from the date of shipment for both New Surplus and fully tested refurbished units.
Start Chat
