D-LX 100
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1. General Information
The D-LX 100 All-In-One Flame Scanner consists of a control unit and an optical flame scanner. The
flame scanner is suitable for monitoring flames from a variety of fuels and combustion techniques,
particularly in single burner applications. Uses for this flame scanner include remote heating stations,
chemical processes or thermal flue gas combustion systems.
The D-LX 100 All-In-One Flame Scanner offers an extremely high degree of safety and availability by
using two microprocessors operating in parallel, with corresponding hardware and software. The
hardware is designed to follow all EC guidelines and laws relevant to electromagnetic compatibility.
Thanks to the fail-safe design of the hardware, and the software’s continuous checks of all safety-
related functions, the D-LX 100 meets the European standards EN 230 (oil) and EN 298 (gas), as well
as technical guidelines for steam boilers TRD 411 to 414 and TRD 604 for intermittent, continuous
and 72-hour operation.
In order to accurately monitor various types of flames and combustion conditions, five different models
are available, with spectral sensitivities in the UV and IR spectrums.
The flame recognition threshold for the flame scanner can be programmed to one of ten different
settings using a push button switch on the front panel. The scanner’s safety time, which refers to the
number of seconds before the scanner will signal flame outage, is set at the factory to 1 s. Longer
safety periods of 3 or 5 s may be programmed in upon request.
If one chooses the most suitable All-In-One flame scanner, positions it correctly on the sighting tube,
and properly sets the threshold, one will always be able to selectively monitor single burners or even a
furnace.
The essential operational groups of the control unit are depicted in the D-LX 100 block diagram (fig.
1):
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Dual-channel microprocessor systems for control and oversight of flame monitoring functions.
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Integrated flame scanner with shutter drive for performing self-checks.
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Dynamically driven fault relay, K1; internal operating voltages and all safety-related hardware
functions are monitored.
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Guided flame relay, K2, with self-checking circuit.
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Programmable flame recognition threshold
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LED display for indicating operational readiness, flame signal or fault.
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4-20 (or 0-20) mA analog output for external display of flame intensity.
