Foxboro FBM46 (P0950BP)

Copy-Ready English Specification

General

Model: FBM46 (P0950BP)

System: Foxboro I/A Series DCS

Type: Redundant HART Analog I/O Module (8AI+4AO)

Role: Redundant interface for HART smart transmitters and analog actuators

Redundancy: 1:1 redundant, hot‑swap (dual‑module fault‑tolerant pair)

Hot Swap: Supported

Certification: CE, UL, CSA, ATEX; Class I Div 2 / Zone 2

Environment: Class G3 (harsh industrial)

Operating Temp: 0 °C to +60 °C

Storage Temp: −40 °C to +85 °C

Humidity: 5–95 % non‑condensing

Dimensions: 140 mm × 165 mm × 45 mm

Weight: 0.6 kg

I/O Channels

Analog Inputs (AI): 8 channels

Signal: 4–20 mA, HART 5/7 compatible

Accuracy: ±0.03 % of span

Isolation: 600 VAC (1 min) channel‑to‑ground

Loop Power: 12–42 VDC (software configurable)

Analog Outputs (AO): 4 channels

Signal: 4–20 mA, HART capable

Accuracy: ±0.03 % of span

Max Load: 735 Ω per channel

Compliance Voltage: 18.6 VDC @ 20 mA

Communication

Backplane: Redundant 2 Mbps I/A fieldbus

Protocol: Foxboro proprietary + HART 5/7 (dual baud rate)

Device Support: Up to 8 HART devices (point‑to‑point/multidrop)

Status LEDs: Module RUN/FAULT + 12 channel COMM/FAULT

Electrical

Supply: 24 VDC (±5 % / −10 %), redundant

Consumption: 12 W (single); 18 W (redundant pair)

Key Features

Redundant HART I/O: Dual‑module redundancy for critical loops

Dual Baud Rate: Auto‑switches 1200 bps (HART) ↔ 2 Mbps (backplane)

Per‑Channel Isolation: Eliminates crosstalk

Diagnostics: HART status, PV/SV/TV/MV, fault alarms

Configuration: Full HART parameter setup via I/A Series software

Termination: P0500RY / RH914TG TA (order separately)

Applications

Critical Process Loops: Redundant control for pressure, temperature, flow, level

Valve Control: Redundant HART positioners, actuators, I/P converters

High‑Reliability Industries: Power, oil & gas, chemical, pharmaceutical

System Migration: Integrate HART devices into I/A Series with redundancy

FBM46 vs FBM44 vs FBM246

FBM46: Redundant 8AI+4AO HART (1:1 hot‑swap pair)

FBM44: Non‑redundant 8AI+4AO HART (single module)

FBM246: DIN‑mount redundant HART interface (compact 200 Series)