Technical Specifications

• Model: 405A401G01

• Manufacturer: Emerson (Westinghouse)

• System Compatibility: Ovation™ DCS (all mainstream versions)

• Function: Industrial network interface / media attachment unit

• Communication Standard: FDDI (Fiber Distributed Data Interface), 100 Mbps redundant dual‑ring

• Port Configuration: 2 × fiber ports (for redundant ring), 1 × DCS system bus interface

• Data Rate: 100 Mbps (wire‑speed)

• Power Supply: 24 VDC ±10% (18–30 VDC), dual redundant inputs

• Power Consumption: ≤ 15 W

• Operating Temperature: 0 °C to +60 °C

• Storage Temperature: −40 °C to +85 °C

• Relative Humidity: 5%–95%, non‑condensing

• Protection: Industrial surge, ESD, EMI shielding; channel‑to‑ground isolation

• Installation: Standard 35 mm DIN rail mount

• Dimensions: ~120 × 80 × 45 mm

• Weight: ~0.8 kg

• Certifications: CE, UL, RoHS compliant

• Key Features: Hot‑swappable, redundant FDDI ring support, automatic fault recovery, LED diagnostics

Application Fields

• Power Generation: Ovation DCS core FDDI ring network, controller‑to‑controller communication, redundant data links for power plant control systems.

• Process Industries: Petrochemical, pulp & paper, cement — high‑speed, redundant networking between control rooms and remote I/O sites.

• Water Treatment: SCADA system backbone, real‑time data transmission for water/wastewater process control.

• Critical Infrastructure: Any application requiring deterministic, fault‑tolerant industrial network communication.

Installation & Wiring

1. Pre‑Installation: Disconnect 24 VDC power; ensure DIN rail is properly grounded.

2. Mounting: Snap module onto a standard 35 mm DIN rail and lock in place.

3. Power: Connect 24 VDC to PWR1/PWR2 terminals; dual‑redundant power recommended for reliability.

4. Fiber Connection: Connect FDDI fiber cables to the two fiber ports (primary/secondary ring).

5. System Bus: Connect the module’s system bus interface to the Ovation controller or I/O base unit.

6. Grounding: Connect chassis ground to system earth for ESD/EMI protection.

Operation & Diagnostics

• Power LEDs: PWR1/PWR2 (green) = power supply normal.

• Fault LED: FAULT (red) = power failure, fiber link error, ring break, or hardware fault.

• Fiber Port LEDs: LINK/ACT (yellow) = link established; flashes during data transfer.

• Management: Configure and monitor via Ovation workstation tools or local diagnostic interface.

Maintenance & Safety

• Maintenance: Inspect fiber connections and power terminals periodically; update firmware for optimal performance.

• Safety: Disconnect all power before servicing; use only certified fiber cables and transceivers.

• Operating Limits: Keep within rated temperature/humidity ranges to avoid damage.

Product Status

• Current Status: Active production; new original and refurbished spares available.

• Compatibility: Fully interoperable with all modern Ovation DCS releases.