3W 24i - Technical Specifications; Cable Information

IIS - IGNITION SYSTEM
intelligent Ignition System with microprozessor controlled auto timing
more infos: www.3w-modellmotoren.de
General
For optimum operation of combustion engines an ignition system with auto timing is necessary. For easy starting
up a spark is ideal in the upper dead point position of the pistion. With increasing rpm a pre-ignition timing up to 30
degree is needed.
This is achieved with our new system using a high precision rpm-check by two magnets built-in the hub of the engine.
The hallsensor transmits the signal to the microprocessor, programmed with our engine characteristic.
Technical specifications
Temperature range : - 40
o
C / + 65
o
C ambient temperature
Voltage range: 4,8 V - 7,5 V five cells NICAD
one - cylinder two - cylinder
Operation voltage 6,0 V 6,0 V
Open - circuit current 18 mA 18 mA
Current - consumption 20 mA 0 rpm 20 mA 0 rpm
100 mA 1000 rpm 120 mA 1000 rpm
950 mA 6000 rpm 1100 mA 6000 rpm
1100 mA 10.000 rpm 1300 mA 10.000 rpm
Ignition Voltage > 20 kV > 20 kV
Rpm. max 12.000 rpm 12.000 rpm
Magnet red (north pole) upper dead point upper dead point
Magnet green (south pole) 55
o
before upper dead point 55
o
before upper dead point
Like all other electronic devices the ignition box gets warm under operating conditions. For that reason a simple
airflow has to be guaranteed. Therefore the 4 delivered rubbermounts have to be used for installation, insuring a
one millimeter gap underneath the box.
Cable information
blue wire to sensor
red / black with bigger dia, with socket to battery
red / black with plug connection for red LED, long contact +
yellow / white with socket connection for 3W tachometer and other options
Info about red LED
a) Ignition battery switched on: LED on
b) Propeller one turn (flip): LED off - ignition ready for operation
c) Propeller not being turned (flipped), after
twenty seconds:
LED on, ignition prepared but not ready for operation
This safty function has two reasons:
- the engine cannot be started by coinsidence if sombody forgot to switch off the ignition
- battery will be protected against incidental discharge
d) in case the LED will not get off when propeller is turned (fliped): hall sensor is not connected or other defect