Model Number Explanation

51402755-100

5140: Honeywell DCS Core Hardware Series

27: LCN Processor Subseries

55: High-performance CPU Module

100: Standard revision, K4LCN-4 designation

Technical Specifications

Function: LCN network management, real-time control processing, data communication

Processor: High-speed industrial CPU, 32-bit architecture

Memory: 512 KB RAM, 2 MB Flash (firmware/configuration storage)

Communication: LCN (Local Control Network), 5 Mbps, redundant A/B ports

Power: 5VDC backplane, ≤ 10W

Dimensions (mm): 127 × 95 × 25 (standard LCN card size)

Weight: Approx. 0.25 kg

Operating Temperature: -40°C ~ +70°C

Compatibility: TDC3000 R500–R610, TPS R100–R120, Experion PKS C300

Interfaces & Configuration

Backplane Interface: LCN chassis dedicated slot, hot-swappable

Front Panel LEDs: PWR, RUN, LCN A/B, FAULT, STATUS

Configuration: TPS/Experion system software; LCN node addressing, redundancy setup

Key Features

LCN Network Control: Manages up to 64 LCN nodes (controllers, workstations, I/O)

Real-Time Processing: Deterministic data exchange for time-critical process control

Redundant Communication: Dual LCN ports for fault-tolerant operation

Self-Diagnostics: Real-time monitoring of CPU, memory, and communication faults

Legacy Compatibility: Backward compatible with older LCN configurations for system upgrades

Applications

Systems: Honeywell TDC3000, TPS, Experion PKS (LCN architecture)

Typical Setup: LCN chassis + 51402755-100 + HPM Controllers + Operator Stations

Industries: Oil & gas, petrochemical, power, metallurgy, water treatment

Use Case: Plant-wide process control, real-time data integration, system coordination

Compatibility & Replacement

Related Modules: LCN cables, LCN chassis, HPM controllers, operator stations

Replacement Model:

K4LCN-4: Standard version (51402755-100)

K4LCN-3: Older revision (legacy systems)