I. Product Description
Brand: Alstom (merged into GE Grid after the combustion safety / power plant control division was incorporated)
Full model: ESA-700 EPSD-0375-1108
Product category: Multi-channel furnace flame signal analyzer (Excell Flame Scanner), core monitoring module for boiler combustion safety
Model code interpretation
EPSD: Flame amplification processing unit of ESA700 series
0375: Hardware power / channel specification code, rated power supply compatible with 110VDC power station DC system
1108: Hardware version, IO channel configuration, program firmware version
Life cycle: The original factory has been discontinued and phased out, no new original factory futures available. The market only circulates disassembled, refurbished, and inventory spare parts.
Origin: Mainly from European and American factories (dominant is Switzerland / the United States)
Core Function Positioning
Designed specifically for power plant boilers, gas turbines, and industrial kilns, it receives signals from ultraviolet / infrared flame probes, real-time collects, filters, and analyzes flame flicker frequency and intensity, determines whether there is fire / fireout, outputs interlock trip and alarm signals, meeting combustion safety interlock specifications.
Supports independent monitoring of multiple burners, distinguishing long-burning flame, main flame, and multi-burner interference
Built-in flame automatic learning algorithm, compatible with natural gas, fuel oil, coal powder, and biomass fuels
Hardware Channels and Panel Configuration
Front panel human-machine interaction
Small LCD digital display: Real-time display of flame intensity, channel status, fault code
Operation keys: Automatic flame learning, threshold setting, channel switching, fault reset
Status indicator lights: POWER power, CHANNEL channel, FLAME flame, FAULT fault
IO terminals (on both sides of the European-style terminal blocks)
Flame probe input: Up to 8 flame sensor signal inputs (corresponding to model suffix 1108’s 8-channel design)
Switching output: Programmable relay contacts (flame presence, flameout trip, probe fault, system self-check fault)
Analog output: 4–20mA flame intensity transducer, connected to DCS / recorder
Communication interface: RS485, capable of uploading flame data and fault records to the upper-level monitoring system
Power supply terminals: DC control power input
Electrical Specifications
Rated power supply: 110VDC (power plant battery standard power supply, compatible with 90~125VDC wide-range DC)
Overall power consumption: 37.5W (corresponding to code 0375’s rated power)
Relay contact capacity: 250VAC/5A, capable of directly driving burner trip circuits
Signal isolation: Electrical isolation of probe input, power supply, and communication, resistant to strong electromagnetic interference in furnace
Protection level: IP30 rack-mounted type, suitable for control cabinet environment
Environment and Installation
Installation method: Standard DIN rail snap-fit installation (wall-mounted in control cabinet)
Operating temperature: -20℃ ~ +60℃
Anti-vibration: Industrial standard 10g, suitable for power plant fans, boiler site environment
Size: Standard compact industrial control module, single-side double-row terminal layout
Core Safety Features
Full-loop hardware self-check: Real-time alarm for probe break, short circuit, module power supply abnormality, circuit fault
Programmable flameout response delay FFRT, preventing instantaneous flame fluctuation from triggering trip
Multi-channel logic interlock: Supports independent protection for single burner, furnace total flame protection logic
Complies with thermal power and petrochemical combustion safety specifications, can be paired with FSSS furnace safety monitoring system
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