Basic Identification

• Model Number: 405A893G01

• Brand: Westinghouse (Emerson Automation Solutions)

• Device Type: 5.25‑inch (133 mm) floppy disk drive (FDD)

• Compatible System: WDPF DCS (legacy Westinghouse distributed control system)

• Form Factor: 5.25" half‑height, industrial chassis mount

• Interface: 34‑pin standard floppy ribbon cable + DC power

• Rated Voltage: 110 VAC (industrial power)

• Warranty: 12 months (factory‑certified refurbished/genuine new)

• Condition: New, refurbished, or surplus (legacy end‑of‑life part)

Core Functions

• System Boot & Initialization: Boots WDPF controllers from 5.25" system floppy disks.

• Firmware Loading: Uploads OS and control firmware to WDPF processing units.

• Configuration Storage: Reads/writes system configuration, logic programs, and parameter sets.

• Data Backup & Restore: Archives critical process data, alarm logs, and historical records.

• Offline Diagnostics: Supports diagnostic disk tools for WDPF hardware troubleshooting.

• Legacy Media Compatibility: Reads/writes standard 5.25" double‑density (360 KB) floppy disks.

Technical Specifications

Drive & Media

• Form Factor: 5.25‑inch, half‑height (HH)

• Disk Type: 5.25" double‑density (DD), 40 tracks, 9 sectors/track

• Capacity: 360 KB (formatted)

• Recording Method: MFM (Modified Frequency Modulation)

• Rotation Speed: 300 RPM

• Data Transfer Rate: 250 Kbps

• Head Positioning: Stepper motor, 40 tracks (0–39)

Electrical & Mechanical

• Power Supply: 110 VAC ±10%, 50/60 Hz

• Power Consumption: ~15 W (operating), ~8 W (idle)

• Interface: 34‑pin industry‑standard floppy signal connector + 4‑pin DC power

• Mounting: Industrial chassis/rack mount (WDPF standard slot)

• Dimensions (W×H×D): 152 × 41 × 203 mm (6" × 1.6" × 8")

• Weight: ~1.2 kg

Environmental

• Operating Temperature: 0 °C to +50 °C

• Storage Temperature: −20 °C to +70 °C

• Relative Humidity: 10 % to 80 % (non‑condensing)

• Shock/Vibration: Industrial‑grade (compliant with WDPF system requirements)

Key Features & Benefits

• Legacy System Lifespan Extension: Essential for maintaining operational WDPF DCS (common in older power plants and heavy industry).

• Genuine OEM Quality: Original Westinghouse/Emerson part, guaranteed compatibility with WDPF hardware.

• Industrial Durability: Built for 24/7 continuous operation in harsh control room environments.

• Plug‑and‑Play Replacement: Direct drop‑in for failed 405A893G01 units; no configuration required.

• Data Integrity: Reliable read/write for critical legacy data and system software.

• End‑of‑Life Support: Sourced as new old stock (NOS) or fully tested refurbished for legacy system maintenance.

Compatibility & Application

• Primary System: Westinghouse WDPF DCS (distributed control system for power generation, oil/gas, and heavy industry).

• Replacement For: Direct replacement for original WDPF 5.25" floppy drive units.

• Typical Use Cases:

  • Power plants (thermal, hydro, nuclear) with WDPF control systems.

  • Refineries and petrochemical facilities using legacy Westinghouse automation.

  • Pulp & paper, mining, and cement plants with WDPF‑based process control.

Installation & Safety Notes

1. Power Off First: Always disconnect WDPF system power before installing/removing the drive.

2. ESD Protection: Use anti‑static wristbands and mats to prevent electrostatic damage.

3. Cable Connection: Align 34‑pin ribbon cable pin 1 (red stripe) with drive pin 1; secure DC power connector.

4. Mounting: Fasten drive to chassis with four screws; ensure proper grounding.

5. Media Handling: Use only high‑quality 5.25" DD floppies; keep disks clean and dry to avoid read errors.

Ordering Information

• Part Number: 405A893G01

• Category: Legacy DCS Spare Parts > WDPF > Storage Devices

• Availability: Limited stock (new old stock/refurbished)

• Lead Time: 1–3 business days (in‑stock); 2–4 weeks (refurbished)