Electrical Description of EGM
Status September 2003 (EvoBus-Service / AFT) Page: 46 of 83
3.1.4 Power supply of ignition module
1. Supply voltage
Nominal voltage: 9 V < U < 30 V
2. Reverse voltage protection
(with connector coding)
Ignition electronics Continuous polarity reversal of supply
connections without damage.
Ignition transformer In case of polarity reversal of supply
connections, short-circuit current flows
through ignition transformer. To prevent
damage to ignition transformer, it must be
limited to max. 7.5 A with external measures.
3. Power consumption
Power consumption of ignition electronics
without energising of ignition output stage
typ. 40 mA
Power consumption of ignition electronics
with energising of ignition output stage
typ. 80 mA
Actuation current via interface
Control-unit ignition module
typ. 10 mA
Primary current of ignition transformer typ. 7.5 A
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