Product Details:

FOXBORO FBM208 P0914TB is a 4AI+4AO galvanically isolated mixed analog I/O fieldbus module from FOXBORO Compact 200 I/A Series DCS. It has 4 channels of 0~20mA analog input and 4 channels of 0~20mA analog output with built-in output readback circuit. Input channels receive 4-20mA signals from HART pressure, flow and level transmitters. The AO readback function continuously samples actual output current and compares it with the DCS setpoint. If the deviation exceeds ±2%, the module will trigger a channel fault alarm to detect hidden faults such as loose wiring, actuator drift or open coil. Each channel uses 16-bit sigma-delta ADC/DAC for high precision conversion. The PCB is conformal coated to resist vibration, dust, humidity and electromagnetic interference in harsh industrial environments. It communicates with FCP controller over redundant 2Mbps fieldbus. Built-in continuous self-diagnosis detects loop break, short circuit and output deviation faults, helping technicians quickly troubleshoot instrument loops. FBM208 supports hot swap and master-tracker redundant module pairing, widely used for DCS maintenance, spare parts replacement and system retrofit projects. Every FOXBORO FBM208 module passes factory testing and calibration before shipment.

Specifications:

Model:FBM208, Part No:P0914TB

Brand:FOXBORO

Product Type:4AI+4AO Mixed Analog I/O Module with AO Readback

System compatibility:FOXBORO I/A Series DCS

Input signal:0~20mA DC analog input,4 isolated channels

Output signal:0~20mA DC analog output with current readback,4 isolated channels

Function:HART compatible,output deviation monitoring

ADC/DAC:16-bit sigma-delta conversion

Communication:Redundant 2Mbps module fieldbus

Redundancy:Master-tracker redundant module support

Diagnosis:Built-in self-diagnosis,loop fault and AO deviation detection

Power supply:24VDC redundant

Hot swap:Supported

Ambient operating temperature:0℃ ~ +60℃

Relative humidity:5% ~ 95%,non-condensing

Installation:Rack card mounting on 200 series baseplate

Environmental grade:G3 harsh environment

FBM208 belongs to the mixed analog I/O family, distinguished from FBM204 with local DPIDA and FBM205 redundant mixed I/O without readback. Its unique AO readback function can find hidden valve control faults which cannot be captured by ordinary analog output cards. It can work with matched FTA terminal assembly and shielded termination cable to complete HART instrument loops. It is widely selected for critical regulating loops on offshore platforms and petrochemical plants where valve output health monitoring is required, and can replace legacy mixed analog I/O cards on I/A DCS systems. Every FOXBORO FBM208 module passes factory testing and calibration before shipment.