Innovate Motorsports SSI-4 - Manual (Page 7)

- 7 -
3. Connecting the SSI-4
The SSI-4 looks like this:
3.1 Connecting power
Connect switched 12V power (switched on when the cars ignition system is on) from the car to
the terminal marked 12V on the SSI-4 connector.
Connect one of the terminals marked GND to a good ground on the car. The engine block will
supply a good ground connection.
3.2 Connecting external sensor signals
For each external connection you can connect the external sensor’s output to the CHx+
connection. Connect the CHx- connection to the ground of the sensor. Make sure the sensor
output signal does not exceed 5V. The SSI-4 is protected if sensor signals exceed that (up to
300V for most inputs), but it cannot measure beyond a 5V signal.
3.3 Powering external sensors
At the connection marked 5V you can connect external sensors. External sensors don’t HAVE to
be powered by the SSI-4. The 5V output is a convenience for external sensors when no 5V
supply is available. The 5V supply can power sensors with a total power consumption of up to
300mA.