1783-SFP100LX Allen-Bradley® 1783-SFP100LX Compatible 100Base-LX SFP Transceiver

Allen-Bradley 1783-SFP100LX Stratix Fiber 100 mB Connectivity Over Single-Mode Fiber Overview

The Allen-Bradley 1783-SFP100LX compatible SFP transceiver is a high-performance, hot-swappable fiber optic module designed for 100Base-LX Fast Ethernet networks. It transmits data at 100Mbps over 10km of single-mode fiber (SMF) using a 1310nm laser, making it ideal for industrial, enterprise, and long-haul applications.

This TAA-compliant transceiver adheres to INF-8074 and SFF-8472 standards, ensuring plug-and-play interoperability with Allen-Bradley® switches and routers. With Digital Optical Monitoring (DOM), users gain real-time visibility into Tx/Rx power, temperature, and LOS (Loss of Signal) status. Its metal housing minimizes EMI, while commercial-grade (0°C to +70°C) operation suits harsh environments.

Specifications

The 1783-SFP100LX is a dedicated Fast Ethernet solution, supporting 100Mbps operation exclusively. Its optical and electrical design is optimized for 100BASE-LX standards, with several inherent technical constraints:

Performance parameters include:

Signal Encoding: Utilizes 4B5B encoding scheme specific to Fast Ethernet
Bandwidth Limit: 155MHz maximum, insufficient for Gigabit operation
Interoperability: Will not function in 1000BASE-X ports without speed negotiation capability

Electrical & Optical Performance

Regulatory Compliance

• ESD Protection: MIL-STD-883E (electrical), IEC 61000-4-3 (optical)
• Laser Safety: FDA 21CFR, IEC 60825-1/2
• EMI/EMC: FCC Part 15, EN55022
• RoHS: Compliant with EU Directive 2015/863

Mechanical & Environmental

• Connector: Duplex LC
• Operating Temp: 0°C to +70°C
• Humidity Tolerance: 5% to 95% non-condensing
• Hot-Pluggable: Yes

Applications

1. Industrial Automation & Smart Manufacturing

1. 1. • Rockwell Automation® Integration:
        • Plug-and-play compatibility with ControlLogix® PLCs, Stratix® 5400/5700 switches, and Allen-Bradley® IIoT gateways.
        • Supports CIP (Common Industrial Protocol) for deterministic real-time communication.
      • Factory Floor Connectivity:
        • Enables low-latency (<1ms) machine-to-controller (M2C) links for robotic arms, CNC systems, and HMIs.
        • Immune to EMI/RFI noise from VFDs (Variable Frequency Drives) and welding equipment.
      • Predictive Maintenance:
        • DOM (Digital Optical Monitoring) tracks fiber degradation, preventing unplanned downtime.

2. Enterprise & Data Center Networks

1. 1. • Backbone Fiber Links:
        • Extends high-availability LANs across campuses (>5km) without signal boosters.
        • Ideal for SAN (Storage Area Networks) requiring 100Mbps sustained throughput.
      • Data Center Use Cases:
        • Inter-rack connectivity in OT (Operational Technology) zones (e.g., SCADA-to-server links).
        • Redundant fiber paths via Rapid Spanning Tree Protocol (RSTP).
      • Legacy Network Upgrades:
        • Cost-effective migration from 100BASE-FX to 100BASE-LX without replacing switches.

3. Transportation & Smart City Infrastructure

1. 1. • Intelligent Traffic Systems (ITS):
        • Connects traffic signal controllers over 10km with <0.1% packet loss.
        • Survives extreme weather (-40°C to +85°C storage-rated).
      • Railway & Metro Networks:
        • Deployed in CBTC (Communication-Based Train Control) for safe, high-speed rail operations.
        • Galvanic isolation prevents ground loops in electrified tracks.
      • Smart Grids:
        • Secures substation-to-control-center communications (IEC 61850 compliant).

4. Military, Defense & Aerospace

1. 1. • Tactical Communications:
        • TAA-compliant for U.S. DoD procurement (DFARS 252.225-7017).
        • Encrypted tactical LANs with MIL-STD-883E ESD hardening.
      • Avionics & UAVs:
        • Lightweight fiber optics replace copper in drone payload links (SWaP-optimized).
        • Vibration-resistant LC connectors for airborne applications.
      • Shipboard Networks:
        • Corrosion-resistant design for naval C4ISR systems.

5. Energy & Utilities

1. 1. • Oil/Gas Pipeline Monitoring:
        • Intrinsically safe fiber links for Zone 1 hazardous areas (ATEX/IECEx).
        • Monitors SCADA sensors (pressure/temperature/flow) up to 10km.
      • Renewable Energy Farms:
        • Connects wind turbine controllers to central servers without lightning risks.

6. Telecommunications

1. 1. • Fiber-to-the-Antenna (FTTA):
        • Front-haul for 4G/LTE small cells with 1310nm wavelength.
      • Last-Mile Solutions:
        • Cost-effective fiber extension for rural broadband (>5km).

Cross-Industry Advantages Table

Implementation Tips

1. 1. Industrial: Use fiber-optic patch panels to protect connectors from dust/oil.
   2. Data Center: Pair with SFP-compatible media converters for hybrid fiber/copper networks.

Why Choose This Transceiver?

✅ 100% OEM Tested – Pre-programmed & serialized for seamless integration.
✅ DOM Enabled – Monitor real-time performance via SFP diagnostics.
✅ Limited Lifetime Warranty – Unmatched reliability guarantee.

FAQs

Q1: Is the 1783-SFP100LX compatible with Cisco/HPE/Juniper switches? Will it work in non-Allen-Bradley equipment?

A: While this transceiver is designed for Allen-Bradley Stratix and ControlLogix systems, it is MSA-compliant (SFF-8472) and may function in other vendors’ switches supporting:

• 100BASE-LX standard (1310nm SMF)
• 3.3V SFP slots

Critical Notes:
✔ Required Checks:

• Verify your switch OEM does not enforce vendor locking (e.g., Cisco “service unsupported-transceiver”).
• Confirm DOM functionality is supported (some switches ignore SFP diagnostics).

✔ Known Working Platforms:

• Siemens SCALANCE X-200 switches
• Moxa PT-7728 series
• Generic MSA-compliant media converters

❌ Avoid:

• Gigabit-only switches (this is strictly 100Mbps).
• Non-MSA-compliant legacy equipment (e.g., early 2000s hardware).

Q2: Can the 1783-SFP100LX operate in extended temperature environments (-40°C to +85°C)?

A: No—this module is commercially rated (0°C to +70°C operational).

Detailed Limitations:

Workarounds for Harsh Environments:

1. Industrial Enclosures: Use NEMA 4X-rated cabinets with cooling/heating for temperature stabilization.
2. Alternative Parts: For <-40°C or >+70°C, seek industrial-grade SFPs (e.g., Oculink CX4-100LX-I rated for -45°C to +85°C).

Q3: Does the 1783-SFP100LX support Gigabit Ethernet (1Gbps) or only Fast Ethernet (100Mbps)?

A: This transceiver is exclusively Fast Ethernet (100BASE-LX) and does not support Gigabit speeds.

Technical Justification:

• Laser Driver Circuitry: Designed for 155MHz bandwidth (sufficient for 100Mbps only).
• Data Encoding: Uses 4B5B (100BASE-X) rather than 8B10B (Gigabit Ethernet).

Upgrade Paths:
✔ For 1Gbps Needs:

• Use 1000BASE-LX SFPs (e.g., AB 1783-SFP1GLX).
• Ensure your switch supports auto-negotiation between 100Mbps/1Gbps.

✔ Legacy Compatibility:

• Pair with a 10/100/1000 media converter if connecting to Gigabit hardware.

Q4: What is the maximum achievable distance with this SFP? Can it exceed 10km?

A: The nominal range is 10km due to:

• Optical Budget: Transmit power (-8dBm) minus receiver sensitivity (-30dBm) = 22dB margin.
• Dispersion Limits: Single-mode fiber at 1310nm has ~3.5ps/(nm·km) chromatic dispersion.

🚨 Beyond 10km Risks:

• Signal Degradation: BER may exceed 1E-12 due to attenuation/scattering.
• Solution: Add an in-line optical amplifier (e.g., EDFA) for distances up to 80km.

Q5: Does this SFP support DDM/DOM (Digital Diagnostics Monitoring)? What parameters can be read?

A: Yes, it provides full DOM per SFF-8472:

Integration Tip: Use Rockwell Studio 5000 Logix Designer or SNMP tools (e.g., LibreNMS) to poll DOM data.

Q6: Is the LC connector OM1/OM2/OM3 multi-mode compatible?

A: No—this transceiver requires single-mode fiber (SMF, 9µm core).

⚠️ Multi-Mode Risks:

• Modal Dispersion: Severe signal degradation over >500m.
• Power Overload: SMF lasers can damage MM fiber receivers.

💡 Hybrid Solution: Use a mode-conditioning patch cable if connecting to MM infrastructure temporarily.