Model Definition

51401551-300: Honeywell standard part number

51401551: Series code for LCN interface modules

300: Hardware revision K2LCN-3, 3rd-generation LCN controller

Module Type: Network Communication Interface

Applicable System: Honeywell TDC 3000, TPS (LCN/UCN), Experion PKS

Alias: K2LCN-3 Interface Card, LCN Node Controller

Technical Specifications

Communication Speed: 10 Mbps (LCN network)

Protocols: LCN proprietary, supports peer-to-peer and broadcast messaging

Redundancy: 1:1 hot standby, automatic failover < 500ms

Power Supply: 24 VDC (±10%), max 250 mA

Operating Temperature: -20°C to +55°C

Storage Temperature: -40°C to +70°C

Humidity: 5%–95% RH (non-condensing)

Dimensions: 220 mm × 120 mm × 30 mm

Weight: Approx. 0.35 kg

Certifications: CE, UL, CSA, RoHS, FM compliant

Interfaces & Configuration

Network Interface: 2 × LCN coaxial ports (redundant A/B)

Backplane Interface: 96-pin gold-finger connector for PMM backplane

Configuration: DIP switches for node address, baud rate, and redundancy mode

Status Indicators: 4 × LEDs for power, LCN link, activity, and fault

Diagnostics: Built-in self-test (BIST), loopback test, and fault logging

Key Functions

LCN Network Communication: Manages high-speed data transfer between LCN nodes (up to 64 nodes).

Protocol Conversion: Translates LCN packets to UCN/PMU protocols for cross-network communication.

Redundant Operation: Supports 1:1 redundancy with automatic switchover to prevent communication loss.

Node Addressing: Assigns unique LCN addresses to nodes and routes data packets.

Fault Isolation: Detects and isolates network faults to maintain system stability.

System Synchronization: Provides clock synchronization across all LCN nodes.

Application Scenarios

Systems: Honeywell TDC 3000, TPS, Experion PKS (LCN/UCN networks)

Industries: Petrochemical, power generation, metallurgy, pharmaceutical, pulp & paper

Applications: DCS node communication, redundant network bridging, process control data exchange

Mounting: PMM 15-slot redundant backplane (e.g., 51401547-100)

Compatible Modules

Backplane: 51401547-100 (15-slot redundant)

Fan Assembly: 51401496-100

Processor: 51400978-100 (PMM CPU)

I/O Modules: 51401491-150 (analog input), 51401551-301 (digital input)