Model Explanation

51402199-100

5140: Honeywell DCS Core Hardware Series

21: LCN Storage / Peripheral Interface Sub-series

99: WDI Second Generation Hard Disk Interface

100: Hardware Version (Standard Buffer Type)

Alias: WDI (Winchester Drive Interface) Technical Specifications

Interface standard: Winchester (ST406/506) hard disk interface

Data buffering: Built-in 8KB RAM (read/write cache)

Transmission rate: Up to 5Mbps (data exchange between the hard disk and LCN)

Hard disk capacity: Supports 5MB - 140MB standard Winchester hard disks

Communication interface: LCN redundant A/B network, hard disk 34-pin control + 20-pin data interface

Power supply: 5 VDC (power supply from the back panel), approximately 400 mA

Operating temperature: 0°C ~ +60°C

Size (mm): 216 × 160 × 30

Weight: Approximately 1.0 kg

Firmware: Compatible with TDC3000 R500~R610, TPS R100~R120

Interface and configuration

Installation: LCN rack standard slot (supports hot plugging)

Panel indicators: PWR, LCN A/B, RUN, FAULT, DISK ACT, etc. LED

Configuration: Set hard disk address, cache mode, read/write permissions through TPS software

Redundancy: Supports 1:1 hot backup, fault switching < 300 ms

Core functions

Hard disk connection: Compatible with old-fashioned Winchester hard disks, compatible with industrial-grade storage devices

Data buffering: 8KB high-speed cache, balances LCN network and hard disk read/write speeds

Protocol conversion: Interconversion between LCN network protocol and Winchester hard disk protocol

Hard disk protection: Overcurrent, overvoltage, static protection to avoid hard disk damage

Data storage management: Historical data archiving, system program loading, configuration file storage Application scenario

Adaptation system: Honeywell TDC3000, TPS (LCN architecture)

Industry: Old process industries such as petrochemicals, thermal power, metallurgy, papermaking, pharmaceuticals, etc. DCS systems

Typical configuration: LCN rack + 51402199-100 (WDI) + Winchester hard disk

Compatibility and alternatives

Complementary modules: LCN backplane, K4LCN processor, WSI2 graphics module

Alternative model: No direct alternative (WDI is a dedicated old-fashioned hard disk interface, gradually phased out as Winchester hard disks cease production)

Upgrade plan: Modern systems can replace with 51403xxx series flash interface cards, adapting to SSD storage