Product Overview

The ABB FAU800 acts as a high-precision diagnostic bridge between field-mounted flame detectors and the plant’s Distributed Control System (DCS) or PLC. This module continuously evaluates raw flame signals, calculates real-time flame quality, and executes fail-safe trip commands if it detects unstable combustion. By supporting a diverse array of sensors—including DFS scanner heads, flame rods, and 4–20 mA/0–5 V analog sensors—the FAU800 provides a centralized, rack-mountable solution for complex multi-burner management. We supply this unit as 100% Brand New and Original to ensure maximum uptime in critical power generation and thermal processing applications.

Technical Specifications

Engineering Advantages

• Predictive Flame-Out Diagnostics: Unlike simple "on/off" relays, the FAU800 analyzes flame frequency and intensity to calculate a "flame quality" metric. This allows operators to identify fouling lenses or fuel-mix issues before a nuisance trip occurs, maintaining process continuity.

• Dual-Channel Efficiency: Each FAU800 module monitors two detectors simultaneously with completely independent configurations. This high-density design reduces the required cabinet footprint and lowers the total cost per burner in large-scale utility boilers.

• Fail-Safe Architecture: The module employs a deterministic safety logic that defaults to a "No Flame" state upon detecting internal hardware faults, communication loss, or power fluctuations. This ensures the system complies with rigorous industrial safety standards for burner management.

• Multi-Protocol Versatility: Integrated support for Modbus RTU and Profibus DP ensures the FAU800 communicates natively with ABB Symphony Plus, 800xA, and non-ABB PLC architectures. Engineers can remotely configure parameters using Flame Explorer software via the RS-485 port.

• Robust Signal Conditioning: The unit filters out background IR/UV radiation from neighboring burners or hot refractory brick. This precise fault isolation prevents cross-talk and ensures that the analyzer only responds to the targeted flame zone.

FAQs

Can I mix different types of sensors on the two channels of the FAU800?

Yes. The FAU800 supports independent configuration for each channel. You can connect a DFS scanner head to Channel 1 and a standard flame rod to Channel 2, providing maximum flexibility for different fuel types (e.g., gas pilots and oil main burners).

What happens if the 24V DC power supply fluctuates?

The FAU800 operates within a wide 21.6–31.2 VDC range. It also supports redundant power inputs. If the voltage drops below the safety threshold, the module initiates a fail-safe shutdown of the flame relays to prevent operation under uncertain conditions.

How does the FAU800 handle "nuisance trips" caused by temporary signal flicker?

You can program a specific flame failure relay drop-out delay (from 0.1 to 2.5 seconds). This "trip delay" filters out momentary signal dips while still meeting the required safety response time for your specific local burner codes.

Is this unit a "Refurbished" or "Discontinued" part?

While some vendors may offer refurbished versions of this module, we provide this specific unit as 100% Brand New and Original in its factory packaging. This ensures the internal solid-state components meet original MTBF (Mean Time Between Failure) ratings for mission-critical safety.