Description

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Technical Specifications

• Brand: Honeywell
• Model: 51305072-300
• Warranty: One Year
• Condition: 100% New & Original
• Communication: LCN (Local Control Network) B channel interface
• Power Supply: 5.1 VDC from TDC300 rack backplane
• Operating Temp: -40°C ~ +70°C
• Humidity: 5%–95% non-condensing
• Weight: 0.40 kg
• Compatibility: Honeywell TDC300 dual-node chassis, paired with 51305072-200 (CLCN-A)
• Coating: Conformal coated PCB
• Indicators: Front LED for LCN link status, transmit, receive and fault
• Certifications: UL, cUL, CE
• Feature: Dedicated LCN-B paddle board for redundant LCN network

3. Product Overview

The 51305072-300 is a rack-mounted LCN-B communication paddle board for legacy Honeywell TDC300 DCS systems. It works alongside the CLCN-A board to implement redundant dual LCN network connections, handling data transmission over the LCN B cable. This redundant design prevents single network cable failure from disrupting system communication between controllers, UCN nodes and operator stations. Front status LEDs give direct visibility of link activity and communication faults for routine maintenance. The conformal coating protects the circuit board against moisture and dust in industrial control cabinets. It is a critical spare part for maintaining existing TDC300 installations in oil & gas, chemical, power and petrochemical plants.