Product Overview
Foxboro RH926GH is a simplex serial termination assembly for Foxboro I/A‑Series and Evo DCS systems, specially designed to work with FDC280 field device controllerparesource…. It delivers physical wiring termination for Modbus RTU serial communication links, converting internal controller signal ports to field‑wirable terminal connections for third‑party instruments, variable‑frequency drives and remote PLC devices. This termination unit ensures signal integrity for long‑distance serial transmission inside control cabinets. It is widely stocked as spare part for maintenance and retrofit of legacy Foxboro DCS installations.
Series
RH926GH belongs to Foxboro I/A‑Series termination hardware family. These termination assemblies act as interface hardware between DCS controller internal ports and field‑side wiring. Different part numbers cover simplex and redundant serial termination variants, supporting Modbus RTU and other serial protocols for process‑automation field device integration.
Product Features
‑ Dedicated simplex serial termination hardware for FDC280 controller serial portsparesource… ‑ Hardware support for RS‑232, RS‑422, half‑duplex RS‑485 signal standards ‑ Optimized signal termination for Modbus RTU communication ‑ Reliable screw terminal blocks for field cable connection ‑ EMI suppression design for industrial cabinet noise environment ‑ Cabinet‑mount structure for standard DCS rack installation ‑ Direct replacement unit, no additional modification required ‑ Ensures signal stability for long‑distance serial field wiring
Product Parameters
‑ Supported Interfaces: RS‑232, RS‑422, RS‑485 half‑duplex ‑ Compatible Controller: FDC280 Field Device Controllerparesource… ‑ Communication Protocol: Modbus RTU ‑ Operating Temperature: 0 °C ~ +55 °C ‑ Storage Temperature: ‑25 °C ~ +70 °C ‑ Relative Humidity: 5%‑85%, non‑condensing ‑ Protection Rating: IP20 (for cabinet‑internal use) ‑ Mounting: Cabinet rack mounting ‑ Approvals: CE compliant
Product Specifications
‑ Form Factor: Termination assembly with terminal blocks and interconnect cables ‑ Signal Type: Serial Modbus RTU signal termination ‑ Wiring Method: Screw‑type field terminals ‑ Cooling: Natural convection inside control cabinet ‑ Matching Accessory: Type 5 termination cables for FDC280 connectionparesource… ‑ Compatibility: Foxboro I/A‑Series, Foxboro Evo DCS platform ‑ Maintenance: Direct swap‑out spare part for field repair
Function
RH926GH provides physical termination for serial communication signals coming from FDC280 controller. It converts controller internal serial ports to field‑wirable terminals, connects to external Modbus RTU slave devices such as transmitters, inverters and third‑party PLCs. It performs signal termination and noise suppression to improve serial‑bus communication stability between DCS system and field equipment.
Purpose
Realize field‑side wiring connection for FDC280 serial communication ports. Guarantee reliable Modbus RTU data exchange between Foxboro DCS and third‑party automation devices. Used as spare replacement for failed termination hardware on existing DCS sites.
Application Fields
Petrochemical refineries, chemical processing plants, power generation stations, pulp‑and‑paper mills, water‑wastewater treatment facilities, legacy Foxboro I/A‑Series and Evo DCS maintenance & retrofit projects.
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