Emerson EPRO A6371/00 Overspeed Protection Backplane

Product Description

The A6371/00 is a critical safety backplane for the Emerson AMS 6300 SIS (Safety Instrumented System). It serves as the hardware foundation for overspeed protection, integrating multiple A6370 monitors to prevent catastrophic turbine failure. Designed for high-availability environments, the backplane employs redundant 2-out-of-3 (2oo3) trip voting logic to ensure a reliable shutdown only when a genuine overspeed condition is detected. This compact, rack-mounted component is SIL2 certified, making it a standard choice for protecting steam, gas, and hydro turbines in power generation and heavy industrial applications.

Technical Specifications

• Model Number: A6371/00

• System Integration: AMS 6300 SIS Overspeed Protection

• Safety Rating: SIL2 (Safety Integrity Level 2) compliant

• Slot Capacity: 3 Slots (14HP each) for A6370 monitors

• Supply Voltage: +24 V DC Nominal (Redundant & decoupled)

• Operating Range: +19 to +31.2 V DC

• Power Consumption: < 30 W

• Relay Output Configurations:

• 2 x "Trip" Outputs: 2oo3 Voting Logic

• 1 x "Digital Out 2": 2oo3 Voting Logic

• 1 x "Digital Out 3": 2oo3 Voting Logic

• 1 x "Channel OK": 1oo3 Logic

• Operating Temperature: -20°C to +65°C (-4°F to 149°F)

• Dimensions: 211 x 130 x 43 mm (Fits 19" rack, 3RU height)

• Protection Class: IP20 (when rack mounted)

• Weight: 0.5 kg (1.1 lbs)

Key Engineering Features

• Redundant Trip Logic: Supports "Trip Voted" (2oo3) configurations, which significantly reduces the risk of nuisance trips while ensuring the system fails safely if a true overspeed event occurs.

• SIL2 Safety Compliance: Meets stringent international standards for functional safety, ensuring the backplane provides the necessary risk reduction for high-stakes industrial assets.

• Redundant Power Input: Features decoupled dual +24V DC power inputs with a common ground, maintaining system operation even if one power source fails.

• Standardized Rack Integration: Designed to fit perfectly into a 19-inch subrack (84HP width), allowing for clean and efficient installation alongside other machinery health monitoring hardware.

• Comprehensive Self-Diagnostics: Includes a "Channel OK" relay (1oo3 logic) that provides an immediate alert if any of the underlying monitor modules or sensors experience a fault.