Model Definition

51401551-301: Honeywell standard part

51401551: LCN interface series

301: K2LCN-3, 3rd-gen, conformal coated

Base Model: 51401551-300 (non-coated)

Module Type: Network Communication / Processor

System Compatibility: TDC 3000, TPS, Experion PKS

Technical Specifications

Communication Speed: 10 Mbps (LCN)

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

Power: 24 VDC (±10%), ~250 mA

Operating Temp: -20°C to +55°C

Coating: Conformal coated (protects against humidity, dust, corrosion)

Dimensions: 220 × 120 × 30 mm

Weight: ~0.38 kg

Certifications: CE, UL, CSA, RoHS, FM

Interfaces & Configuration

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

Backplane: 96-pin gold-finger (PMM backplane)

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

Indicators: 4 LEDs (power, LCN link, activity, fault)

Diagnostics: BIST, loopback test, fault logging

Key Functions

LCN Communication: High-speed data exchange (up to 64 LCN nodes)

Protocol Conversion: LCN ↔ UCN/PMU

Redundant Operation: Auto failover, no communication loss

Node Addressing & Routing: Unique addressing, data packet routing

Environmental Protection: Conformal coating for harsh conditions

System Synchronization: Clock sync across LCN nodes

Application Scenarios

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

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

Environments: Humid, dusty, corrosive (coated version preferred)

Mounting: 15-slot redundant PMM backplane (51401547-100)

Compatible Modules

Backplane: 51401547-100 (15-slot redundant)

Fan: 51401496-100

CPU: 51400978-100

I/O: 51401491-150 (AI), 51401551-300 (non-coated LCN)