Description
1. Unboxing & Physical Snapshot
1. Unboxing & Physical Snapshot- Model & Brand: Westinghouse / Emerson (WDPF Control Architecture), Part Number 5A26391H24
- Physical Dimensions: 7.5 inches x 1.0 inches x 10.0 inches (190 mm x 25 mm x 254 mm)
- Estimated Shipping Weight: 1.8 lbs (0.82 kg) sealed in multi-layer anti-static cushioning material
- What’s in the Box: Printed circuit card assembly, metallized ESD shielding pouch, desiccant packet, and factory traceability documentation (terminal blocks and mounting bases sold separately)
2. Product Introduction
Engineered to operate within the demanding node racks of legacy Westinghouse WDPF distributed control systems, this controller module handles deterministic task processing and high-speed data acquisition. (—which requires strict adherence to backplane insertion depths to prevent contact damage). Technicians must align the printed circuit board assembly carefully inside the sub-rack guide rails before engaging the top and bottom mechanical levers.
Thermal management across the local cabinet relies entirely on passive convection through the slotted front aluminum faceplate. Maintaining proper vertical spacing above and below the card cage is vital for preventing localized hot spots during continuous plant operations.
3. Core Technical Specifications
| Parameter | Value |
| Form Factor | Standard WDPF sub-rack plugin card |
| Operating Voltage | +5 VDC / +12 VDC bus powered |
| Power Consumption | 7.5 Watts nominal |
| Heat Dissipation | 25.6 BTU/hr |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Storage Temperature | -40°C to 85°C (-40°F to 185°F) |
| Relative Humidity | 5% to 95% non-condensing |
| Communication Interface | Proprietary WDPF highway link |
| Faceplate Material | Anodized aluminum with extraction tabs |
| Physical Weight | 1.3 lbs (module assembly only) |
4. Global Compliance & Industry Certifications
Regulatory auditors require complete documentation packages for all electronic equipment integrated into safety-related process loops. Expected compliance markers for this hardware tier include the CE Mark for European market entry and UL/cUL Listed status for industrial control equipment.
The UL designation verifies that internal galvanic isolation barriers satisfy stringent dielectric standards, preventing dangerous voltage feedback from field connections into the main system bus. (—a primary checkpoint during facility insurance risk assessments).
Audit Note: Verify specific lot certifications and date codes directly with the OEM before commissioning the hardware into regulated protection loops.
5. Long-Term Storage & Asset Preservation Guide
Spare cards frequently spend years on warehouse shelves awaiting scheduled maintenance outages. Protect this asset using proper storage protocols:
- Keep the module sealed inside its original metallized anti-static (ESD) shielding bag to isolate delicate semiconductor components from airborne chemical pollutants and moisture.
- Keep the warehouse climate controlled so that relative humidity remains strictly below 60%, preventing micro-oxidation on the gold-plated connector edge fingers and printed traces.
- For electronic assemblies holding vintage electrolytic capacitors sitting unused past a 3-year window, instrumentation technicians must perform a controlled voltage-reforming procedure on a test bench before energizing live inputs.
6. Physical Installation Prerequisites
- Maintain a minimum vertical clearance of 60 mm above and below the card cage to permit unhindered convective cooling airflow.
- Bolt the chassis backplane directly to a clean, low-impedance ground bus bar using heavy-gauge copper straps to minimize electrical noise interference.
- Inspect the physical backplane keying slots prior to insertion to confirm correct part matching and avoid bending terminal pins.
7. Buyer’s FAQ (Logistics & Compliance Focus)
Q: What Harmonized System (HS) code applies to the international import of this controller card?
A: Industrial electronic processor and controller modules typically classify under HS code 8538.90 (parts suitable for use solely or principally with control apparatus). Verify final classification parameters with your customs broker.
Q: Does the declared Country of Origin (COO) affect export control screenings?
A: Yes, tracking the verified COO dictates whether specific Export Administration Regulations (EAR) apply during cross-border freight transfers.
Q: What level of transit insurance is recommended for legacy module shipments?
A: Full replacement-value shipping insurance is mandatory because discontinued hardware cannot be quickly replaced if damaged in transit.
Q: Do surplus modules ship with pre-loaded factory firmware?
A: Units normally carry a baseline operational image; controls engineers must flash the precise software version matching the site’s configuration baseline during setup.
