1. Overview
The FBM227 (spare part number P0927AC) is a dedicated hybrid field I/O module for the Foxboro I/A Series DCS system, integrating 0–10V analog and high-voltage digital channels. It is suitable for applications such as valve position feedback, servo positioning, and collection of high- and low-voltage contacts. With an aluminum extruded housing, it meets the G3 industrial environmental standards required in chemical and power industries.
Channel Specifications (Core I/O Configuration)
1. Analog Channels (Fully Isolated)
AI: 4 channels, 0–10VDC
Usage: sliding resistance position transducer, DC voltage sensor, valve position feedback acquisition; each channel is independently electrically isolated.
AO: 2 channels, 0–10VDC
Usage: valve positioner, local regulator, field display table driver; paired channels are isolated.
2. Digital Channels (Group Isolation)
DI: 4 channels, 130VDC high-voltage input
Contact / DC voltage detection, 2 channels in one group are isolated, can be connected to high-voltage field switches.
DO: 4 channels, transistor output
Two working modes:
External power supply: maximum 60VDC load switching;
Built-in 11VDC three-wire output, direct drive solid-state relay SSR.
Electrical and Environmental Parameters
Power Supply: DC24V, allowable fluctuation -10% to +5%, maximum power consumption of the entire unit is 7W, heat dissipation is 3W
Bus Communication: Redundant 2Mbps internal field bus, dual-channel redundancy, single-channel failure automatic switching, compatible with DPIDA/MDACT control algorithm module
Operating Temperature: -40℃ to +70℃; Storage -40℃ to +85℃
Protection and Immunity: aluminum heat dissipation shell, 5g random vibration, 30g impact tolerance; 5% to 95% RH without condensation, complies with IEC EMC industrial electromagnetic compatibility
Installation: I/A series base slot-type installation, equipped with dedicated terminal connection components TA terminal block, the longest cable extension is 30 meters
Weight / Size: approximately 2kg, standard FBM module industrial housing
Core Features
Channel Isolation Protection
Analog input/output are isolated in pairs; digital I/O 2 channels are isolated in one group, blocking ground loop interference, protecting the main control card.
Redundant Bus Communication
Dual 2M backplane bus, uninterrupted data interaction, improving system continuous operation reliability.
Integrated Mixed Signal
One module simultaneously processes valve position analog feedback, analog regulation output, high-voltage switch status, relay drive, reducing the number of cabinet cards.
Built-in Diagnosis
Channel open circuit, short circuit, bus failure, power abnormal self-diagnosis, real-time alarm on DCS upper computer.
Typical Application Scenarios
Petrochemical industry, power plant boiler / steam turbine auxiliary equipment valve position regulation loop
Servo positioning mechanism, sliding displacement sensor acquisition control
High-voltage equipment door switch, limit contact status monitoring
Local small loop PID regulation (supports MDACT/DPIDA local control)
There are no reviews yet.