Foxboro RH928AW Remote I/O Field Terminal Module

I. Basic Information
Brand: FOXBORO (Schneider’s brand)
System: I/A Series / Foxboro Evo DCS Distributed Control System
Product Type: Remote Field-Type 8-Channel Digital Input Terminal Module
Position: Installed in the explosion-proof / highly corrosive working environment area, collecting 24VDC switch quantity signals from valves, pumps, limit switches, etc., and uploading them to the DCS main controller through the field bus, belonging to the FBM series as a supporting remote I/O terminal unit.

Core Electrical Parameters
Power Supply: DC 24V (wide voltage 18～32VDC), with power supply reverse connection protection, surge TVS protection, typical power consumption <3W
Channel Configuration: Single module 8 isolation-type digital input, suitable for NPN/PNP on-site passive/active switch signals
Bus Interface: Equipped with FBM master card, communicating with the rack master controller through FOXBORO field bus
Protection Grade: IP66/IP67 fully sealed cast aluminum housing, without heat dissipation holes, capable of withstanding salt fog, dust, humidity, corrosive G3 industrial environment, can be installed on-site wall-mounted without a control cabinet
Operating Temperature: -20℃～+60℃; Storage Temperature: -40℃～+70℃
Vibration Resistance: 5g RMS (20～2000Hz), shock resistance 15g, suitable for strong vibration industrial environments in chemical, oil and gas, and power plants

Main Functional Features
On-site Local Signal Collection: Directly installed at the device site, shortening the length of on-site signal lines, significantly reducing line interference and cable costs
Channel Electrical Isolation: Each DI channel is independently optically isolated, preventing on-site ground loops and high voltage from entering and damaging the DCS rack components
Status Fault Diagnosis: Each channel has an LED status indicator light, allowing for intuitive viewing of signal continuity, short circuit, and open circuit faults
Corrosion Reinforced Design: Aluminum alloy anodized sealed housing, widely used in high-corrosion workshops in refineries, paper mills, and power plants
Modular Hot Swap Maintenance: A single module failure can be replaced independently, without affecting the operation of other I/O points on the same bus

Compatible Rack Master Card
RH928AW is a remote terminal slave module, must be used in conjunction with FBM series master cards:
FBM207, FBM208 Digital Input Master Card
Multiple RH928AW remote I/O modules can be networked and expanded through one field bus

Typical Application Scenarios
Switch quantity collection in oil refining and chemical processing plant sites
On-site signal collection in thermal power plants, chemical SIS/ESD interlock systems
High-humidity and high-corrosion process workshops in papermaking, water treatment, and coal chemical industries
Remote discrete signal monitoring in offshore platforms, explosion-proof areas

Similar Models in the Same Series
RH928AW: 8-channel DI digital input remote terminal module
RH927AH: 8-channel DO digital output remote terminal module, used for on-site valve, relay drive control