Description
1. Unboxing & Physical Snapshot
- Model & Brand: Westinghouse / Emerson (Ovation Control Architecture), Part Number 4D33942G01
- Physical Dimensions: 4.8 inches x 1.0 inches x 3.8 inches (121 mm x 25 mm x 95 mm)
- Estimated Shipping Weight: 5.4 lbs (2.45 kg) enclosed in heavy-duty anti-static and shock-absorbing cushioning
- What’s in the Box: Controller slot rack chassis assembly, protective terminal covers, and factory conformance tracking documentation (individual processor cards and power harnesses sold separately)
2. Product Introduction
Providing the structural backplane foundation and high-speed data transmission channels for localized processor nodes, this sub-rack chassis secures directly into heavy-duty industrial cabinets. (—which requires precise mechanical alignment to prevent torsion strain on the embedded backplane pins). Instrument fitters must anchor the metal frame securely to the cabinet rails to support the continuous weight and thermal profile of mounted control cards.
Within the broader distributed control system framework, this chassis manages power distribution buses and internal communication pathways among inserted modules. Convection airflow paths surrounding the housing dictate strict layout rules, making careful vertical spacing inside the enclosure mandatory for long-term operational integrity.
3. Core Technical Specifications
| Parameter | Value |
| Form Factor | Ovation controller slot rack / sub-rack chassis |
| Input Power Supply | 24 VDC nominal bus feed |
| Current Rating | 5A maximum distribution capacity |
| Operating Temperature | -20°C to 70°C (-4°F to 158°F) |
| Storage Temperature | -40°C to 85°C (-40°F to 185°F) |
| Relative Humidity | 5% to 95% non-condensing |
| Backplane Bus | High-speed Ovation node communication link |
| Chassis Material | High-grade industrial metal alloy |
| Physical Weight | 5.4 lbs (chassis assembly only) |
4. Global Compliance & Industry Certifications
Safety inspectors mandate verified documentation for all structural hardware and backplane assemblies deployed within continuous process loops. Expected regulatory approvals for this tier of industrial hardware include the CE Mark for European conformity and UL/cUL Listed status for industrial control equipment.
The UL listing confirms that internal power bus barriers satisfy stringent dielectric and fire safety standards, safeguarding the control architecture against severe electrical faults. (—a primary metric inspected during facility insurance underwriting reviews).
Audit Note: Verify specific lot certifications and date codes directly with the OEM prior to installation in safety-instrumented functions.
5. Long-Term Storage & Asset Preservation Guide
Industrial chassis frames and backplane assemblies often remain warehoused for years before a scheduled plant expansion or overhaul. Protect this asset using strict warehouse maintenance routines:
- Keep the slot rack enclosed inside heavy anti-static and moisture-barrier wrapping to protect delicate backplane edge connectors from airborne chemical pollutants and oxidation.
- Maintain the warehouse storage environment at a relative humidity strictly below 60% to halt corrosion formation across the metallic backplane pins and mounting brackets.
- Periodically inspect the structural alignment of the card guide slots to ensure no physical warping occurs during prolonged shelf storage.
6. Physical Installation Prerequisites
- Maintain a minimum vertical clearance of 75 mm above and below the chassis housing to permit unhindered convective cooling airflow for inserted modules.
- Bolt the metal frame directly to a clean, low-impedance ground bus using heavy braided copper straps to minimize electrical noise interference and loop ground faults.
- Verify that slot keying alignments match incoming processor card specifications prior to active system hardware integration.
7. Buyer’s FAQ (Logistics & Compliance Focus)
Q: What is the correct Harmonized System (HS) code for customs clearance of this chassis rack?
A: Industrial electronic sub-racks and parts for control apparatus typically map to HS code 8538.90. Confirm exact classifications with your licensed customs broker.
Q: Does the listed Country of Origin (COO) impact international export compliance screenings?
A: Yes, tracking the exact COO dictates whether specific Export Administration Regulations (EAR) apply during cross-border freight forwarding.
Q: What tier of shipping insurance is recommended for transit dispatch?
A: Full replacement-value freight insurance is mandatory because structural backplane assemblies require specialized handling to prevent frame distortion during transit.
Q: Do these surplus chassis units include pre-installed wiring harnesses?
A: Units generally ship as standalone metal slot racks; field technicians must install appropriate power distribution wiring and backplane jumpers matching the site configuration.
