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Common / ConnectingRPMSensors

Connecting the RPM pickup

IMPORTANT:
* If you connect a "high level" signal to the "low level" RPM input, you will damage the DL
* Never connect anything directly to the high tension / high voltage output of the coil, this will almost certainly destroy the DL!


In this file you can learn how to connect an RPM to the Data Logging Units. Information will also be given on connecting the RPM to your vehicle. Please check the RPM connections carefully. Due the power output of the ignition system, it is possible to damage the data logger unit if it is connected incorrectly. Damage caused by incorrect installation is not covered by the product guarantee.

DL1

For more information on the DL1 connectors, click here.

The DL1 can be used with either a "high level" input or a "low level" input for maximum flexibility. In both cases, the maximum frequency is in excess of 1kHz so even if you are detecting on the king lead of a V8 with a distributor then the maximum is >12000rpm.

If you are detecting the RPM using the high level pickup, then it should be connected to the DL1 on its "Spark In" and "Spark Gnd" inputs. Alternately, the DL1 can detect RPM from a low level source by connecting to the "RPM [5v]" input. This is suitable for connecting to RPM outputs from an ECU or Tacho signal. This input requires a minimum input of 5v to trigger it, but it is protected up to the battery voltage (15v).

Because the number of different ways that you can connect the DL1 to RPM sources, there are no "standard" leads shipped with our products - if you require a particular lead for you application, then please contact sales@Race-technology.com

Please be aware that it’s simply impossible for Race Technology to answer questions like:

• has my ECU got an RPM output, and is it suitable
• which wire should I use on my coil pack or sensor

We just don’t have access to that type of information. If you are unsure then the Internet - particularly car user forums - is a great resource that we would refer you to use.

DL2

For more information on the DL2 connectors, click here.

As with the DL1, the DL2 can be used with either a "high level" input or a "low level" input for maximum flexibility.

To connect the RPM Sensor, you need to connect to Conn-1 on the DL2. Pin 4 will be the ground and you will connect the other lead to Pin 2 for a Low Level RPM Sensor, and to Pin 5 for a High Level RPM Sensor.

AX22

For more information on the AX22 connectors, click here.

The AX22 can be used to connect to "low level" RPM inputs. This is suitable for connecting to RPM outputs from an ECU or Tacho signal. This input requires a minimum input of 5v to trigger it but is protected up to the battery voltage (15v). Connect the RPM sensor to the Ground and the RPM Input connectors on the back of the AX22.

Connection methods