BEYOND FIXED CONSTRAINTS
THE ERA OF PARAMETRIC CONTROL
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Innovate by simplifying
Parametric Burner Controllers
Core technology
What does "parametric" really mean?
It means Q2 adapts to your burner — not the other way around.
While traditional controllers force you into rigid, pre-defined sequences, the Q2 Series offers a blank canvas for your combustion logic. Every single stage of the burner management cycle can be individually configured, timed, and assigned specific control logic.
Two paths. One controller.
The Q2 Series bridges the gap between proven reliability and bold innovation.
Respecting tradition
Standard applications, zero compromise
Manage standard burner applications with the precision and safety required by current regulations.
Exploring new frontiers
Applications previously impossible
Test and implement new behaviors: breaking the constraints of predefined sequences.
Engineering freedom
Stop compromising. Start configuring
Q2 isn't just a controller — it's a platform for your engineering creativity.
SAFETY & COMPLIANCE
Designed for high-demand environments
The Q2 architecture supports safety functions up to SIL 3 pursuant to EN 61508 (Certificate No. FSCO-00172). The device is rigorously tested to meet the requirements of the Gas Appliance Regulation (EU) 2016/426 (GAR) and standards for automatic burner control systems and safety devices (Certificate No. 26GR0050/00 – PIN 0063DR1822).
CONNECTIVITY
Industrial IoT — built in.
Native TraxBus interface provides control and diagnostics. Expand your connectivity with Qnet for PROFINET / ModbusTCP or Qio for hardwired electrical control. Embedded webserver provides easy access to status and diagnostics.
FAQ
Frequently asked
questions
Technical questions about the Q2 platform, compliance, and deployment.
Parametric Architecture
What does "parametric burner controller" mean?
Unlike fixed-logic controllers, the Q2 lets you customize every stage of the ignition cycle: defining valve activation, input mapping, stage durations, and predefinable actuator positions. The result is a single device natively capable of managing single-stage, multistage, modulating, recuperative, and regenerative burners across multiple fuels — including natural gas, hydrogen, and blue flame oil.
Can the burner run without cyclic interruptions?
Yes. The Q2 supports permanent operation, eliminating the periodic shutdowns required by standard intermittent controllers — and the associated production losses — in both low- and high-temperature applications.
How many fuel valves can it manage?
The Q26 and Q28 models handle up to 4 fuel valves, enabling complex combustion regimes such as staged injection or multi-stage systems.
Safety & SIL 3 Certification
Why does SIL 3 certification matter if the device is already EN 298 compliant?
EN 298 is the minimum baseline. SIL 3 certification (IEC 61508) delivers a higher level of hardware and software integrity, with data verified by a Notified Body. For plants designed under IEC 61511, Q2 is a plug-and-play component within safety loops, eliminating the need for manual reliability calculations.
Does the SIL 3 certification cover High Temperature Mode (HTM)?
Yes. It includes HTM management as a safety function — specifically, indirect flame supervision enabled by a certified external device signal.
Does SIL 3 eliminate periodic maintenance shutdowns?
Yes. The real-time advanced diagnostics built into the safety core replace the periodic inspections required by less sophisticated controllers.
What are the benefits from an insurance and audit perspective?
A third-party SIL 3 certificate demonstrates proactive risk management and can lead to liability insurance premium reductions, providing documented due diligence in protecting personnel and high-value assets.
High Temperature Mode & Flameless Combustion
Are HTM and Flameless mode the same thing?
No. HTM is an operating mode: direct flame monitoring is excluded once the auto-ignition temperature is exceeded. Flameless is a specific combustion regime (distributed oxidation without a visible flame front) that can only occur within an HTM regime.
How does the start-up sequence change above the auto-ignition threshold?
If the HTM signal (from STL) is present, the Q2 executes a hot start-up: it suppresses the ignition spark stage and flame sensor verification, proceeding directly to HTM. Without the signal, it follows the conventional sequence with ignitor activation and flame verification.
How is the transition to Flameless managed without a full shutdown?
Q2 uses Stage 5 as an intermediate step: the gas valves are closed to extinguish the conventional flame, followed by Stage 6, where only the valves configured for flameless operation are opened. This internal transition eliminates the need for a full burner restart while still allowing a full restart as a configurable option
What happens if the HTM signal is lost during operation?
Q2 adopts the user-configured safe behaviour: it can revert to a low-temperature stage restoring direct flamen supervision, or proceed to a controlled burner shutdown.
Is an external certified signal required to enable HTM?
Yes. High Temperature Mode must be activated by an external Safety Temperature Limiter, certified according to EN 14597:2012, to maintain the required SIL 2 integrity. The Q2 does not measure temperature directly.
Decentralized VPS & Fuel Safety
What is Decentralized VPS and why is it superior to the market standard?
Traditional installations use a centralized Valve Proving System on the main gas train, which cannot guarantee the tightness of individual burners. Q26 and Q28 verify valve and pipework integrity at every single combustion point.
Does Decentralized VPS require additional hardware?
No. It uses the existing pipe volume between the two mandatory shut-off valves as a test chamber and leverages the existing fuel pressure switch.
Can a single pressure switch safely perform two functions?
Yes. The Q2 handles the two functions at separate cycle stages: valve proving occurs before start-up or after shutdown, while minimum supply pressure monitoring is active during normal burner operation. Since all test timings are fully configurable, the pressure switch threshold can be set freely to match any installation requirement. Fully compliant with EN ISO 13577-4.
What is the Proof of Closure (POC) function?
Terminal F3 reads back the status of the output driving the safety valve or, where required by standards such as NFPA 85/86 or EN ISO 13577-2, via an integrated limit switch. This function can also be used simultaneously with VPS and includes a customizable activation time to ensure compatibility with slow-opening valves without triggering nuisance lockouts.
Connectivity, IIoT & Cybersecurity
Is the safety core affected by network failures?
No. The certified core is optically isolated from all communication interfaces. Flame supervision, sequences, and shutdowns are executed autonomously — burner safety is never compromised, although a shutdown can be configured in the event of a prolonged communication failure.
Can I monitor the burner without a PLC?
Yes. The Qio interface allows traditional remote control via hardwired contacts while providing an integrated webserver for browser-based monitoring — also available via Qnet and TraxGateway.ETH. For simplified installations, the TCU6 manages up to 6 burners (or burner zones) via TraxBus with no external PLC required, acting natively as a pre-configured multi-zone controller.
How does the Q2 integrate with Siemens TIA Portal?
Via the QNET expansion board, with plug-and-play integration using standard GSDML files. Supports both cyclic real-time I/O and acyclic diagnostic data (historical logs, statistics). For more cost-effective implementations, up to 99 burners can be managed as a single PROFINET node using TraxGateway.ETH, which also provides easy integration through its dedicated GSDML file.
How many devices does a TraxBus network support?
The logical address space covers 3,844 nodes, each identified by a unique alphanumeric character pair. Physical limits depend on the interface: TraxInterface3 (300 units), TraxInterface4 (250), TraxGateway.ETH (99).
How do maintenance teams access the Q2 on-site?
On-site access is secured via the front magneto-optic jack, ensuring maximum operational safety through mandatory physical contact. Unlike the inherent insecurities and interference risks of radio-based controls, the physical interface guarantees that only authorized, present personnel can handle configuration and commissioning. Both configuration and commissioning access are password protected. The Qio and Qnet interfaces feature an integrated webserver accessible from any browser. For deeper, high-level integration, Qnet enables robust access via PROFINET, delivering acyclic data directly to the supervisory system with industrial-grade reliability.
What cybersecurity standards does the Q2 follow?
It uses a zone-based security model aligned with the Cyber Resilience Act (CRA) and EN 18031. Each interface is classified as segregated, conduit, or disabled based on its risk profile, minimizing the attack surface while keeping the safety core isolated.
Diagnostics & Hardware
Does the device store historical fault data?
Yes. The advanced self-diagnostic system logs lockouts, failures, total operating time, and operation counts for the unit, the burner, and its valves.
Can the ignition transformer be integrated into the Q2?
Yes, reducing the overall mechanical footprint of the burner assembly.
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