Emerson 2840A18G03 Product Description

Overview

Key Features

• Q‑Line Quad Relay Output Design: Four independent electromechanical relay channels optimized for WDPF and Ovation DCS platforms.

• DPDT Contact Configuration: Each channel provides double‑pole double‑throw (DPDT) contacts for flexible, isolated switching of two‑way circuits.

• Galvanic Isolation: High isolation voltage between channels and the backplane prevents ground loops and enhances electrical safety in noisy industrial environments.

• Wide Load Compatibility: Controls 120/240 V AC or up to 30 V DC loads such as motor starters, solenoid valves, heaters, and alarm beacons.

• Rugged Industrial Build: Industrial‑grade PCB with a durable metal enclosure provides resistance to vibration, dust, moisture, and temperature extremes.

• Hot‑Swappable & Rack‑Mountable: Standard DCS rack form factor allows replacement during live operation without system shutdown.

• Seamless System Integration: Fully compatible with Westinghouse WDPF I/II and Emerson Ovation DCS for direct drop‑in replacement.

• Onboard Diagnostic LEDs: Channel‑level status and fault indicators enable quick troubleshooting and routine maintenance.

• Long‑Term Reliability: Engineered for 24/7 continuous operation in power, chemical, and oil‑gas facilities with minimal downtime.

Technical Specifications

• Manufacturer: Emerson (formerly Westinghouse)

• Model Number: 2840A18G03

• Product Type: Q‑Line QRO Card / Quad DPDT Relay Output Module

• Compatible Systems: Westinghouse WDPF DCS, Emerson Ovation DCS

• Output Channels: 4 isolated DPDT relay channels

• Contact Rating: 5 A @ 120/240 V AC; 5 A @ 30 V DC (resistive load)

• Isolation Voltage: 1500 V AC (channel‑to‑backplane)

• Switching Type: Electromechanical relay (dry contact)

• Operating Temperature: –20 °C to +60 °C (–4 °F to +140 °F)

• Relative Humidity: 5 % to 95 % non‑condensing

• Enclosure: Industrial metal casing

• Weight: Approximately 1.42 kg (3.13 lbs)

• Dimensions: Standard DCS rack‑mount form factor

• Compliance: Meets industrial safety and EMC standards for process control equipment

Applications

• Power Generation: Thermal, combined‑cycle, and nuclear plants for controlling boiler igniters, fan motors, and auxiliary system heaters.

• Chemical & Petrochemical Plants: Driving solenoid valves, pump motor starters, and process heaters in production and storage areas.

• Oil & Gas: Refineries, offshore platforms, and gas processing plants for AC/DC load control and system coordination.

• Water Treatment: Controlling AC‑powered pumps, valves, and chemical feeders in municipal and industrial water facilities.

• Metallurgy: Steel mills and metal processing plants for furnace heaters, rolling mill auxiliary motors, and production line actuators.

Installation & Integration

Maintenance & Support

• Routine Maintenance: Inspect for physical damage, dust accumulation, and loose connections; verify LED status indicators periodically.

• Repair Services: Authorized providers offer standard (2–4 weeks) and rush repair options for faulty units.

• Warranty: Typically covered by a 12‑month warranty against manufacturing defects (terms vary by supplier)。