Key Specifications

• Model: 405A675G63

• Manufacturer: Westinghouse / Emerson

• System Compatibility: WDPF, Ovation DCS

• Type: 12‑slot MultiBus chassis (backplane assembly)

• Slots: 12 module positions

• Backplane: MultiBus parallel bus, high‑speed inter‑module communication

• Input Power: 115 VAC (integrated power supply)

• Mounting: Standard 19” industrial rack

• Dimensions (W×H×D): approx. 483 × 133 × 280 mm

• Weight: approx. 4.5 kg

• Status: Obsolete (EOL)；available as NOS or refurbished

• Warranty: 12 months (refurbished)；24 months (NOS)

Main Features

• 12‑slot high‑density design – flexible system configuration for up to 12 modules.

• MultiBus backplane – reliable, high‑speed data exchange between controllers and I/O.

• Integrated 115 VAC power – powers backplane and modules, reduces external wiring.

• Rugged industrial construction – heavy‑duty metal, card guides, EMI shielding.

• Hot‑swap capable – modules can be inserted/removed online (system‑dependent).

• Full legacy compatibility – works with WDPF/Ovation hardware for maintenance and migration.

Applications

• Power generation (thermal, nuclear, combined‑cycle plants)

• Process industries (petrochemical, pulp & paper, cement, water treatment)

• DCS maintenance / spare parts replacement for existing WDPF/Ovation systems

Related Models

• 405A675G21: 4‑slot power supply chassis (24 VDC, 10 A)

• 405A675G33: 12‑slot MultiBus chassis (similar, different revision)

• 405A675G61: 12‑slot MultiBus chassis (similar, different revision)

• 405A675G62: 12‑slot MultiBus chassis (similar, different revision)

Installation (Manual Excerpt)

1. Mount chassis to standard 19” rack with 4 front‑panel screws.

2. Connect 115 VAC to chassis power inlet.

3. Insert modules into slots 1–12; ensure full seating and locking.

4. Verify module LEDs: green = power OK.

Maintenance

• Quarterly: Inspect backplane connectors for dirt/corrosion; check module seating and fasteners.

• Cleaning: Use dry, low‑pressure compressed air to clean slots/connectors.

• Safety: Disconnect AC before servicing; wait 5 minutes for capacitor discharge.

LED Indicators (on Modules)

• Green (Power): ON = normal power

• Red (Fault): ON = backplane/module fault (overvoltage, overcurrent, communication error)

Disclaimer