Brahma-37505001-NDM11PR-Steuergerät

Brahma NDM11PR (art. 37505001) is a microprocessor-based control unit designed for automation of ignition, flame monitoring and safe operation of atmospheric progressive burners operating on gas or liquid fuel in intermittent mode. The device provides a full cycle: pre‑purge, ignition, continuous flame monitoring and safety lockout. The NDM11PR model is optimally suited for burners that require a fixed purge time before ignition and is widely used in domestic boilers, water heaters, hot air guns and other heat‑engineering equipment. Main technical specifications Parameter Value Supply voltage 220–240 V, 50/60 Hz Flame control Ionisation electrode or photodiode FD Burner type Atmospheric, progressive Fuel type Gas, liquid fuel Operating mode Intermittent Pre‑purge time 30 seconds Safety time (Ts) 3 seconds Operating temperature –20 °C to +70 °C Protection class IP40 Dimensions (H×W×D) 10.7 × 8.1 × 3.6 cm Key features Built‑in high‑voltage ignition transformer – no external unit required, simplifies installation and saves space. Microprocessor control with self‑diagnosis – periodic checking of all components increases reliability. 30‑second pre‑purge – removes residual fuel from the combustion chamber before ignition, ensuring safe start‑up. Universal flame control – works with an ionisation electrode (for gas) or a photodiode FD (for liquid fuel). Safety lockout – if no flame is present within the safety time or flame is lost during operation, the unit goes into emergency mode. Electric lockout reset – briefly interrupting power is sufficient to restart (manual reset by a button is also possible if available). LED indication – displays operating mode and fault codes for quick diagnostics. Protection against interference and voltage surges – built‑in EMC filter and varistor. Compact IP40 housing – protection against dust and splashes, convenient for mounting on a DIN rail or inside equipment. Applications Atmospheric progressive gas and oil burners Domestic heating boilers (gas, oil) Water heaters, convectors, infrared heaters Hot air guns and heat generators Baking ovens, drying chambers, process equipment Order codes 37505001