ALSTOM DFI-150-0003 is a Limelight diagnostic flame indicator circuit board. Due to the lack of official detailed data, the following parameters are inferred based on similar flame detection circuit boards and related information:
Power Supply Parameters: The rated power supply voltage is likely 100Vac, 50~60Hz, with a power consumption of less than 7W.
Flame Response Parameters: The flame response time may be 3±1s (when the flame voltage is 4.2V).
Contact Rating Parameters: The contact rating may be 250VA.
Flame Sensitivity Parameters: The ignition detection level may be a maximum flame voltage of 1V, and the flameout detection level may be a minimum flame voltage of 0.4V.
Signal Output Parameters: The flame signal output may be 0~5Vdc, with a maximum wiring distance of 10m (using shielded wires). The output terminals are water body side A() and B(+), and the input resistance of the external connected equipment is above 100kΩ.
Display Parameters: It may adopt LED to display the flame voltage, with the display level being fully off.
Environmental Parameters: The allowable ambient temperature is -20~+60℃ (when only one unit is installed) or -20~+45℃ (when two or more units are densely installed). The allowable ambient humidity is 90%RH (at 40℃, no condensation). The vibration resistance is below 4.9m/s², 10~60Hz, 2 hours each in X, Y, Z directions (when installed with screws).
Insulation Parameters: The insulation resistance between each terminal and the ground is above 50MΩ when tested with a 500Vdc insulation resistance tester. The withstand voltage between each terminal and the ground is 1500Vac at commercial frequency for 1 minute or 1800Vac for 1 second when a suspected flame is detected, with no abnormalities (except for the flame detection input of terminals G and 6).
