2. Product Function Description

1. Electrical-Coaxial Signal Conversion

   Converts parallel internal electrical signals of NIM mainboard into differential coaxial signals for KLCN bus long-distance transmission; reversely converts remote coaxial KLCN signals back to electrical signals for LCN network data interaction.

2. Dual Redundant Bus Support

   Supports A/B dual redundant KLCN coaxial channels, automatic seamless switchover when single cable fails, ensures uninterrupted communication between central control room operator stations and remote field NIM cabinets.

3. Isolation & Anti-Interference

   Built-in signal isolation and TVS surge suppression circuits, suppress ground loop potential difference, ESD and industrial electromagnetic interference, avoid lightning and field surge damage to upper LCN network equipment.

4. Network Data Forwarding

   Real-time transmission of operator station setpoints, alarm logs, historical trend data, controller parameter download instructions between multi-cabinet LCN nodes via KLCN extended bus.

5. Full Self-Diagnosis

   Real-time monitor coaxial cable open circuit, short circuit, optical/coaxial link loss, communication error code count, internal power supply anomaly; fault alarms uploaded to system alarm management.

6. Hot Swap Design

   Standard Eurocard plug-in subboard structure, supports online replacement without powering off the NIM cabinet, reduces maintenance downtime.

3. Core Electrical & Communication Specifications

1. Bus Standard: Honeywell proprietary KLCN extended coaxial bus (LCN inter-cabinet communication)

2. Channel: Dual redundant A/B coaxial ports

3. Cable Matching: 75Ω standard industrial control coaxial cable

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

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

6. Protection: On-board ESD protection, TVS transient surge suppression, channel isolation circuit

7. Self-Diagnosis Items: Coaxial link detection, communication error counter, board power heartbeat monitoring

8. Mechanical Parameter: Dimension 190×185×65mm, net weight approx 0.42kg

9. PCB Feature: Non anti-corrosion conformal coating, UL industrial safety certified

10. Power Consumption: Max 2.3W

4. Industrial Application Scenarios

1. Chemical & Petrochemical Plants

   Cross-workshop LCN network extension; realize unified monitoring of reactor, distillation column field controllers by central control room operator stations through KLCN coaxial bus.

2. Thermal Power Industry

   Long-distance communication between main control building and boiler room, desulfurization/denitrification auxiliary control cabinet; isolate lightning surge interference via coaxial isolation circuit.

3. Oil & Gas & Coastal Tank Farm

   Multi-area tank farm, compressor station inter-cabinet LCN networking, stable transmission of tank level, pipeline pressure custody transfer data.

4. Large Process Industrial Parks

   Multi-building distributed DCS system LCN bus expansion, realize centralized configuration, historical trend collection and fault alarm management of all field control nodes.

Series Version Distinction

• 51304544-100: Standard KLCN coaxial modem subboard, non-coated PCB, general factory indoor cabinet

• 51304544-200: Conformal coated version, for high-humidity, corrosive gas, coastal salt fog harsh environments