25SU3-5168 Fireye Flame Amplifier

Overview

The Fireye 25SU3-5168 is a high-sensitivity flame safeguard amplifier designed for industrial and utility burner management systems. It functions as a critical safety component by confirming the presence or absence of a flame, providing reliable ignition and flame failure protection. The 5168 model is specifically engineered with high sensitivity (low discrimination) to monitor applications where the scanner pulse ratio from flame-on to flame-off is large (greater than 3:1). This unit is typically surface-mounted using a specific wiring base and can be integrated into 19-inch rack-mounted systems.

Features

• High sensitivity design optimized for low-intensity or difficult-to-detect flame signals
• Repetitive self-checking circuitry when used with compatible Fireye scanners to ensure system integrity
• Dual voltage capability supporting both 120 VAC and 230 VAC operations
• Integrated flame relay and master relay for safety interlock functions
• Front-panel test jacks providing a 0-3 VDC flame signal strength output for commissioning and troubleshooting
• Modular construction consisting of components 60-2203-2, 60-2207-1, and 60-2301
• Optional 10-LED bar graph display for visual flame strength monitoring

Specifications

• Supply Voltage: 120 VAC or 230 VAC (+10%, -15%), 50/60 Hz
• Power Consumption: 13 VA with one scanner; up to 20 VA with two scanners
• Flame Failure Response Time (FFRT): Selectable for 1, 2, or 3 seconds
• Operating Temperature: 0 degree C to 60 degree C (32 degree F to 140 degree F)
• Storage Temperature: -40 degree C to 85 degree C (-40 degree F to 185 degree F)
• Humidity: Maximum 85% relative humidity, non-condensing
• Shipping Weight: Approximately 2.7 kg (6 lbs)
• Compatible Scanners: 45UV5 (1000, 1010, 1101), 45RM1, 45RM2, 45RM4, 45FS1, and 45UVFS1

Applications

The 25SU3-5168 is widely used in demanding industrial environments, including power generation plants, pulp and paper mills, chemical processing facilities, and electric utility furnaces. It is designed to supervise burners firing various fuels such as natural gas, oil, pulverized coal, or combinations thereof. It is particularly suited for supervised manual, semi-automatic, and fully automatic burner management systems where precise flame discrimination is required for safe continuous operation.