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The SAACKE FSC-01 v1.00 is a dedicated flame supervision control module developed by SAACKE, a global leader in industrial and marine combustion systems. Designed as a critical safety interface in burner management systems (BMS), the SAACKE FSC-01 v1.00 processes analog signals from UV or UV/IR flame scanners—such as the Siemens QRA2—and converts them into fail-safe relay outputs that confirm flame presence or trigger emergency shutdowns. This module is commonly integrated into SAACKE’s SKV and SKM series boiler control panels used in power generation, district heating, and maritime applications.
Positioned as a legacy but mission-critical component, the SAACKE FSC-01 v1.00 ensures compliance with international safety standards by preventing unmonitored fuel release during ignition or operation. Its core function goes beyond simple signal conversion: it incorporates adjustable flame threshold and time-delay circuits to suppress false alarms caused by hot refractory, welding arcs, or ambient light—common challenges in high-temperature environments. Despite its analog architecture and lack of digital communication, the SAACKE FSC-01 v1.00 remains widely deployed due to its reliability, simplicity, and seamless integration into existing hardwired safety loops where network-based alternatives are impractical or cost-prohibitive.
Technical Specifications
Product Model | FSC-01 v1.00
Manufacturer | SAACKE GmbH
Product Type | Flame supervision control module
Input Signal Range | 0–10 V DC (from UV/IR flame scanners)
Output Contacts | 3× Form C relays (Flame OK, Flame Lost, Fault); 5 A @ 250 V AC
Power Supply | 24 V DC ±10%, with reverse polarity protection
Adjustable Parameters | Flame sensitivity and response delay (0.5–2 seconds) via front-panel potentiometers
Operating Temperature | 0°C to +55°C
Enclosure Rating | IP20 metal housing with conformal-coated PCB
Mounting Method | 35 mm DIN rail (EN 60715 compliant)
Certifications | Designed per IEC 60730 Class B; compatible with DNV, ABS, GL marine standards
Relay Monitoring | Mechanical interlock with welded-contact detection on safety outputs
Manufacturer | SAACKE GmbH
Product Type | Flame supervision control module
Input Signal Range | 0–10 V DC (from UV/IR flame scanners)
Output Contacts | 3× Form C relays (Flame OK, Flame Lost, Fault); 5 A @ 250 V AC
Power Supply | 24 V DC ±10%, with reverse polarity protection
Adjustable Parameters | Flame sensitivity and response delay (0.5–2 seconds) via front-panel potentiometers
Operating Temperature | 0°C to +55°C
Enclosure Rating | IP20 metal housing with conformal-coated PCB
Mounting Method | 35 mm DIN rail (EN 60715 compliant)
Certifications | Designed per IEC 60730 Class B; compatible with DNV, ABS, GL marine standards
Relay Monitoring | Mechanical interlock with welded-contact detection on safety outputs
Main Features and Advantages
Fail-safe relay architecture with welded-contact detection:
The SAACKE FSC-01 v1.00 employs mechanically linked Form C relays for its Flame OK and Flame Lost outputs. If a contact welds shut—a known failure mode after years of cycling—the internal monitoring circuit activates the Fault relay, forcing a hard shutdown. This design aligns with the functional safety intent of IEC 61508 SIL2 when embedded in a complete burner management loop.
The SAACKE FSC-01 v1.00 employs mechanically linked Form C relays for its Flame OK and Flame Lost outputs. If a contact welds shut—a known failure mode after years of cycling—the internal monitoring circuit activates the Fault relay, forcing a hard shutdown. This design aligns with the functional safety intent of IEC 61508 SIL2 when embedded in a complete burner management loop.
Robust analog signal conditioning for real-world noise:
Unlike basic comparators, the SAACKE FSC-01 v1.00 uses hysteresis and low-pass filtering tailored to SAACKE combustion dynamics. The front-mounted sensitivity potentiometer allows field calibration to match specific scanner types and flame characteristics, while the adjustable time delay (0.5–2 s) prevents nuisance trips during unstable ignition phases.
Unlike basic comparators, the SAACKE FSC-01 v1.00 uses hysteresis and low-pass filtering tailored to SAACKE combustion dynamics. The front-mounted sensitivity potentiometer allows field calibration to match specific scanner types and flame characteristics, while the adjustable time delay (0.5–2 s) prevents nuisance trips during unstable ignition phases.
Simplified integration with zero software dependency:
The SAACKE FSC-01 v1.00 operates entirely on hardwired I/O—no configuration software, firmware updates, or communication protocols are required. This makes it immune to network failures, cybersecurity risks, and compatibility issues, which is especially valuable in brownfield plants with mixed-vintage control systems. Technicians can troubleshoot it with a multimeter, not a laptop.
The SAACKE FSC-01 v1.00 operates entirely on hardwired I/O—no configuration software, firmware updates, or communication protocols are required. This makes it immune to network failures, cybersecurity risks, and compatibility issues, which is especially valuable in brownfield plants with mixed-vintage control systems. Technicians can troubleshoot it with a multimeter, not a laptop.
Marine and industrial ruggedness:
Housed in a grounded metal enclosure with a conformal-coated printed circuit board, the SAACKE FSC-01 v1.00 resists humidity, salt spray, and electrical interference common in engine rooms and boiler houses. The potentiometers are sealed under a tamper-evident cover, ensuring settings remain intact while allowing authorized recalibration after sensor replacement.
Housed in a grounded metal enclosure with a conformal-coated printed circuit board, the SAACKE FSC-01 v1.00 resists humidity, salt spray, and electrical interference common in engine rooms and boiler houses. The potentiometers are sealed under a tamper-evident cover, ensuring settings remain intact while allowing authorized recalibration after sensor replacement.
Application Field
The SAACKE FSC-01 v1.00 is predominantly used in auxiliary boilers aboard cargo ships, tankers, and offshore platforms, where it monitors flame in oil- or gas-fired steam generators that supply heat for cargo heating, turbine startup, or hotel loads. A malfunctioning FSC-01 v1.00 could lead to a dangerous fuel accumulation or, worse, a boiler explosion—making reliable spares essential for maritime safety compliance.
In land-based applications, the SAACKE FSC-01 v1.00 is found in municipal district heating plants, pulp & paper mills, and refinery waste-heat recovery systems. These facilities often run continuously for months, and unplanned trips due to faulty flame verification result in significant operational and regulatory consequences. The adjustable delay on the SAACKE FSC-01 v1.00 helps distinguish true flameouts from transient signal dips during load swings or soot-blowing cycles.
Legacy sustainment is another critical use case. Many SAACKE installations from the late 1990s through early 2010s remain in service due to their mechanical robustness and conservative safety design. Since SAACKE has not released a direct digital successor, the SAACKE FSC-01 v1.00 continues to be sourced as a verified spare to extend asset life—particularly in regions where full combustion system retrofits are economically unfeasible.
Related Products
SAACKE SKV-10: Main burner controller that typically hosts the FSC-01 v1.00 as a sub-module
Siemens QRA2: UV flame scanner commonly used as input source for FSC-01 v1.00
Honeywell SF810: UV/IR dual-spectrum scanner compatible with FSC-01 v1.00 input range
SAACKE FSC-02: Enhanced variant with improved EMI shielding—used in high-noise electrical environments
ABB PST-3: Alternative flame amplifier from ABB—not pin-compatible, requires rewiring
Emerson 644HT: Smart flame monitor with HART output—represents a modern migration path away from FSC-01 v1.00
Rockwell 1756-OF8: Analog output module sometimes used in retrofit projects to digitize FSC-01 v1.00 signals
Installation and Maintenance
Pre-installation preparation: Before installing the SAACKE FSC-01 v1.00, ensure the control panel environment complies with IP20 requirements and maintains ambient temperatures below 55°C. Use shielded twisted-pair cable for the flame scanner input, grounding the shield only at the FSC-01 v1.00 terminal block to prevent ground loops. Verify that the 24 V DC supply is stable and fused according to SAACKE schematics—voltage transients can damage the analog input stage. Always de-energize the panel before snapping the module onto the DIN rail.
Maintenance recommendations: Inspect the SAACKE FSC-01 v1.00 annually for signs of electrolytic capacitor aging, relay contact erosion, or dust buildup on the PCB. Recalibrate after replacing the flame scanner: adjust the sensitivity pot until the “Flame OK” LED stabilizes during normal combustion, then set the time delay to 1–1.5 seconds to filter ignition transients without compromising safety response. If the unit fails to trip during a simulated flame loss, check for welded relay contacts—a common wear-out mechanism after 10+ years of service. Maintain a tested spare FSC-01 v1.00 on-site; verified units may have extended lead times due to legacy status.
