Foxboro FCM2F2 RH914YZ

Product Overview

Technical & Performance Parameters

• Max Fiber Transmission Distance: 2 km (1.24 miles)
• Fiber Cable Compatibility: 62.5/125 µm multi-mode fiber optic cable
• Fiber Connector Interface: ST-type industrial fiber optic connectors
• Fieldbus Transmission Speed: 2 Mbps HDLC for 200 Series FBM I/O modules
• Operating Supply Voltage: 48 VDC baseplate backplane power
• Max Power Consumption: 7 W
• Signal Attenuation Tolerance: Max 1 dB/km @1300 nm wavelength, 3.6 dB/km @850 nm wavelength
• Operating Temperature: -30 °C ~ +70 °C
• Operating Humidity: 5% ~ 95% RH non-condensing
• Environmental Rating: ISA S71.04 Class G harsh industrial certified
• Physical Dimensions: 105 mm (H) × 25 mm (W) × 160 mm (D)
• Net Weight: 284 g
• Certifications: CE, UL 61010, ATEX Zone 2

Material Composition

1. Outer enclosure: Extruded solid aluminum alloy housing with hard anodized anti-corrosion coating
2. Circuit board: 4-layer FR4 PCB with acrylic conformal coating for chemical vapor resistance
3. Fiber transceiver: Industrial-grade laser diode multi-mode optical transmitter/receiver
4. Baseplate contact pins: Gold-plated beryllium copper for long-term vibration resistance
5. Front panel: Laser-etched polycarbonate status indicator panel

Structural Characteristics

• Standard Foxboro I/A Series baseplate hot-swappable horizontal module form factor
• Dual ST fiber connector ports mounted on front panel for transmit/receive fiber termination
• Four multi-color LED status indicators: Power, Fieldbus Active, Fiber Link Fault, Module Diagnostic Fault
• Integrated anti-vibration retention latch locks module securely to baseplate during seismic activity
• Single-width module slot footprint for minimal baseplate space consumption

Working Principle

1. Receives Module Fieldbus electrical signals from local baseplate via backplane copper contacts
2. On-board optical transceiver converts electrical HDLC bus signals to modulated light signals for fiber transmission
3. Transmits light signals across multi-mode fiber cable to a matching FCM2F2 module at the remote baseplate
4. Remote FCM2F2 converts optical signals back to electrical bus signals to communicate with local FCP280 field control processor
5. Continuous real-time fiber link loss monitoring automatically triggers fault alarm if optical signal attenuation exceeds rated threshold

Core Function Features

1. Complete galvanic electrical isolation between local and remote DCS cabinets via fiber medium
2. Support redundant dual-module installation on adjacent baseplate slots for fault-tolerant fieldbus extension
3. Hot-swap compatible; replacement without full baseplate power shutdown
4. Built-in fiber link loss diagnostic with front-panel visual fault indication
5. Bidirectional simultaneous transmit/receive for full-duplex fieldbus data communication

Advantage Highlights

1. Solves copper cable maximum 100m fieldbus distance limitation for large plant distributed control layouts
2. Immune to high EMI interference from large motors, VFDs, power transformers in heavy industry
3. Aluminum rugged housing withstands high shock and vibration in mining, offshore facilities
4. No ground loop signal distortion between geographically separated control buildings
5. Interoperable with all Foxboro I/A Series FCP controllers and FBM I/O modules without firmware modification

Applicable Industries

Installation Requirements

1. Install exclusively on standard Foxboro I/A Series baseplate slot positions
2. Redundant FCM2F2 pairs must occupy adjacent left/right baseplate slots
3. Matching FCM2F2 modules required at both fiber cable endpoints; mixed FCM2F2/FCM2F4/FCM2F10 incompatible
4. Fiber cable routing must maintain minimum 30 mm bend radius to avoid permanent signal attenuation
5. ST fiber connector end faces must be cleaned with optical fiber lint-free wipes before insertion

Usage Precautions

1. Do not expose front panel fiber ports to industrial dust, moisture, or chemical vapor without protective dust caps installed
2. Avoid direct eye exposure to active fiber laser transmit port; permanent retinal damage risk
3. Max three sequential fiber extension baseplate chains supported; fourth extension chain causes bus latency overflow
4. Annual fiber link loss testing required to maintain DCS communication reliability
5. Store spare modules with ST connector dust caps permanently attached to prevent transceiver contamination