Electrical Data

The MIC3+ has the following electrical characteristics.

Feature

Value

Power consumption

Max. 65 W at 24 V

Power supply

Nominal voltage: 24 V DC
Operating voltage: 10 V DC to 32 V DC

Required current

Max. current 7.0 A. An estimation of the power requirements can be found after this table.

Number of outputs

6 or 12 outputs

Firing angle

The size of the firing angle depends on the max. overspeed. The smallest ignition angle can be calculated using the following formula:

Ignition frequency

With full energy output (all 12 ignition outputs with 300 mJ), an ignition frequency of 180 Hz as continuous load is possible. With less ignition energy or in case of a brief overload, 200 Hz is possible. The maximum output load of 60 W must not be exceeded.

2-stroke engine:

4-stroke engine:

 

Estimation of Current Requirements

These current values are based on a nominal speed of 1800 rpm and 300 mJ energy.

Outputs

Voltage

Required current

Voltage

Required current

6

24 V

2.1 A

12 V *

3.9 A

12

24 V

3.3 A

12 V *

6.4 A

* Nominal voltage 24 V DC

Electrical Data for Inputs and Outputs

The inputs and outputs of the ignition controller have the following electrical data:

Inputs and outputs

Values

Analog current input

Current range: 0 mA to 20 mA (adjustable in MICT)
Input impedance: 27 Ω || 1 µF

Analog voltage input

Voltage range: 0 mA to 10 mA (adjustable in MICT)
Input impedance: 12.4 kΩ || 200 nF

Auxiliary analog input supply voltage

5 V to 24 V/50 mA depending on the configuration in the MICT

Binary input (Start/Stop)

Wiring

Input current: max. 20 mA
Ignition stop: 0 V to 0.8 V (low level)
Ignition release: 2.8 V to 32 V (high level)

Binary input (schedule A/B)

Wiring

Input current: max. 20 mA
Schedule A: 0 V to 0.8 V (low level)
Schedule B: 2.8 V to 32 V (high level)

Binary input (GPI, general purpose input)

Wiring

Input current: max. 20 mA
Low level: 0 V to 0.8 V
High level: 2.8 V to 32 V

(Function dependent on the configuration in MICT, see Inputs/Outputs – Inputs)

Go/NoGo and GPO outputs

One GPO (General Purpose Output) and one Go/NoGo output

Implementation as optical MOSFET relay

Maximum switching voltage: 32 V DC

Peak/steady current: max. 100 mA DC

Output power: max. 2.5 W

Internal resistance: 58 Ω to 60 Ω

Activation delay: 0.5 ms / max. 100 mA load

Deactivation delay: 0.2 ms / max. 100 mA load

If a short is found at the output, a safety circuit, which makes the output highly resistive, is found at the output, so that the current sets itself at 50 mA to 60 mA.

LED

Five LEDs are used as status indicators.

ASO output

TTL level (5 V)
max. current: ± 10 mA

Pickup input

Impedance: 10 kΩ

The voltage supply for inductive pickups can be set using the MICT from 5 V to 24 V.

Max. frequency for the pickups: 10 kHz

The formula for determining the frequency of the pickups can be found in the note following this table.

For a pickup output impedance of 120 Ω to 10 kΩ, the pickups connected to the MIC3+ may not have a higher voltage than ±40 V and the connected power may not exceed 1 W.

Ignition coil outputs

Output voltage: max. 250 V

Output energy in normal operation: max. 300 mJ (depending on the ignition coils used)

Output energy in the start phase: max. 500 mJ

 

Frequency of the pickups

The frequency of the pickup is calculated as per the following formula.