2. Product Function Description

1. Optical / Electrical Bidirectional Conversion

   Convert internal NIM electrical differential signals to optical signals for long-distance fiber transmission; convert remote optical bus signals back to electrical signals for NIM to exchange data with LCN network.

2. Complete Electrical Isolation

   Fiber medium eliminates ground potential difference, ground loop interference and lightning surge damage between different control buildings, greatly improving anti-interference performance for cross-plant UCN networking.

3. Dual Redundant A/B Fiber Channels

   Dual optical ports support hot backup UCN bus architecture; automatic switchover between optical paths upon single fiber break without interrupting system control communication.

4. Harsh Environment Adaptation (-200 coating feature)

   Full-board acrylic conformal coating resists moisture, corrosive gas, dust and salt fog, suitable for chemical, offshore, coastal power plant harsh cabinet environments.

5. Full Hardware Self-Diagnosis

   Real-time detection of fiber disconnection, optical power loss, transceiver fault, internal power abnormality; fault alarms uploaded to operator station via LCN.

6. Rack Hot Swap Support

   Standard paddle plug-in structure, can be replaced online without powering off the NIM cabinet.

3. Core Electrical & Optical Technical Specifications

1. Transmission Medium: Single-mode / Multi-mode fiber optic cable

2. Bus Protocol: UCN Universal Control Network deterministic real-time communication

3. Channel Configuration: Redundant A/B dual optical transmit-receive channels

4. Isolation Performance: Complete galvanic isolation between local cabinet and remote field control room

5. PCB Feature: Full anti-corrosion conformal coating (key difference from -100 version)

6. Power Supply: Powered by NIM mainboard internal auxiliary circuit

7. Operating Ambient Temperature: -40℃ ~ +70℃ industrial wide temperature range

8. Protection Design: On-board TVS surge suppression, optical port ESD protection

9. Self-Diagnosis Functions: Optical link loss detection, communication error counter, board power monitoring

10. Physical Parameter: Net weight approx 250g, standard Eurocard sub-board size

11. Certification: UL industrial safety certification

4. Industrial Application Scenarios

1. Chemical & Petrochemical Plants

   Cross-area UCN networking between central control room and remote reactor, distillation column field cabinet; eliminate ground loop interference in multi-unit workshop.

2. Thermal & Power Generation Industry

   Long-distance communication between boiler room, turbine house and desulfurization denitrification subsidiary control cabinet; lightning surge isolation via fiber.

3. Oil & Gas / Offshore Platform

   Coastal tank farm, compressor station, offshore platform long-distance DCS bus transmission, anti-salt fog corrosion via coated PCB.

4. Large-Scale Process Parks

   Multi-building distributed control system UCN fiber extension, realize unified LCN operation station monitoring of all field controllers (APM/HPM).