Specifications

• Manufacturer: Emerson / Westinghouse

• Model: 3D52389G02

• Product Type: Relay Output Module

• Compatible System: OVATION DCS (not WDPF/DeltaV)

• Output Configuration: Isolated dry‑contact relays

• Contact Rating: Typically 240 VAC / 300 VDC, 5 A resistive

• Number of Channels: 8 or 16 relay outputs (OVATION standard)

• Backplane Interface: OVATION standard I/O bus

• Operating Temperature: 0 °C to +55 °C

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

• Mounting: Standard OVATION I/O rack slot

• Status: Active / available as OEM or refurbished

Key Features

1. Isolated Relay Outputs: Each channel provides galvanic isolation between the control system and field devices, reducing electrical noise and improving safety.

2. Dry‑Contact Switching: Relay contacts handle both AC and DC loads, suitable for valves, solenoids, motors, and alarm beacons.

3. High Reliability Industrial Design: Built for continuous operation in harsh environments, with surge suppression and long‑life relay elements.

4. Direct OVATION Integration: Connects directly to the OVATION I/O backplane for fast, reliable data exchange with the controller.

5. LED Status Indicators: Front‑panel LEDs show channel ON/OFF status and module health for quick diagnostics.

6. Hot‑Swappable: Can be inserted or removed from the rack without shutting down the system, minimizing downtime during maintenance.

Applications

• Power Plants (Thermal / Nuclear): Control of valves, dampers, motor starters, and alarm annunciation.

• Petrochemical & Refining: On/off control of pumps, solenoids, and safety shutdown devices.

• Water / Wastewater Treatment: Actuators, valves, and process interlocks.

• General Process Industry: Any OVATION‑based system requiring discrete on/off control of external loads.

Installation & Operation

• Rack Installation: Insert the module into an available OVATION I/O rack slot; ensure the backplane connector is fully seated and the module is secured.

• Wiring: Connect field devices to the relay terminal strips following site wiring diagrams; observe voltage and current ratings.

• Power‑Up: The module receives power from the OVATION backplane; front‑panel LEDs light to indicate power and communication status.

• Configuration: Use OVATION control software to assign logic to each relay channel; test outputs via software or local diagnostics.

Maintenance & Troubleshooting

• Preventive Maintenance: Inspect front‑panel LEDs and wiring quarterly; check for loose terminals or signs of overheating.

• Relay Contact Wear: If a channel fails to operate, verify coil voltage and contact continuity; replace the module if contacts are burned or welded.

• Communication Errors: Check backplane seating and controller status; re‑seat the module if faults persist.

• LED Diagnostics: Refer to OVATION documentation for LED blink codes indicating module or channel faults.

Safety Notes

• Electrical Safety: Disconnect all field wiring before removing or servicing the module to avoid electric shock.

• ESD Protection: Use a grounded wrist strap when handling the module to prevent static damage to electronic components.

• Load Ratings: Do not exceed the maximum contact voltage or current ratings to avoid damage and fire risk.

• Compliance: Installation and maintenance must comply with Emerson OVATION standards and site safety regulations.

Warranty & Availability

• Warranty: Typically 12 months for new or refurbished units, covering defects in materials and workmanship.

• Availability: In stock as new OEM or refurbished; standard lead time 1–2 weeks, with rush service available for critical applications.