RacecapturePro MK3 hardware install
Installation
Mounting Orientation
The default and recommended mounting orientation is flat with indicators facing forward for visibility.
- Mount as flat as possible for best performance from the built-in accelerometer / gyro.
Alternative Mounting
You can mount the system in other orientations. For best accelerometer and gyro performance, it's recommended you mount in an orientation that's square to the orientation of the car.
- Example:
- Upside down
- Vertical / on edge
If an alternate mounting orientation is chosen, you should re-map the accelerometer and gyro channels to reflect this change.
Connections
Main Connector
The main connector provides access to all power, sensor and communications for the RaceCapture/Pro system.
| Power | |
|---|---|
| Connection | Color |
| 12v | Red |
| Ground | Black |
| Frequency / RPM sensor inputs | |
| Blue | Frequency / RPM input 1 |
| Blue / White stripe | Frequency / RPM input 2 |
| Blue / Green Stripe | Frequency / RPM input 3 |
| Blue / Orange Stripe | Frequency / RPM input 4 |
| Voltage Reference | |
| Yellow | +5v voltage reference |
| Analog Sensor Inputs | |
| White | Analog Input 1 |
| White / Black Stripe | Analog Input 2 |
| White / Orange Stripe | Analog Input 3 |
| White / Blue Stripe | Analog Input 4 |
| White / Gray Stripe | Analog Input 5 |
| White / Green Stripe | Analog Input 6 |
| White / Red Stripe | Analog Input 7 |
| White / Brown Stripe | Analog Input 8 |
| General Purpose Input / Output (GPIO) | |
| Gray | GPIO 1 |
| Gray / White Stripe | GPIO 2 |
| Gray / Blue Stripe | GPIO 3 |
| Auxiliary Serial Input | |
| Purple / White Stripe | Auxiliary RS232 Serial TX |
| Purple | Auxiliary RS232 Serial RX |
| CAN Bus | |
| Orange / Blue Stripe | CAN 1 High |
| Orange | CAN 1 Low |
| Orange / Green Stripe | CAN 2 High |
| Orange / White Stripe | CAN 1 Low |
Plug Connector Type
The connector is a standard 24 pin Molex Mini Fit Jr.
- Plug Housing: Molex Mini Fit Jr. 39012240
- Compatible Pins: Molex 46018-1541 or 46018-1541
- ProTip: a 24 pin Molex harness from a computer power supply can also work as a secondary wiring harness
GPS
Connect the included GPS antenna to this port.
- Note: Tighten this connection to 5-6 inch/lbs (just beyond finger tight). Do not over torque
Cellular Telemetry
If optioned with the 3.5G real-time cellular telemetry module, connect the cellular antenna to this port.
- Note: Tighten this connection to 5-6 inch/lbs (just beyond finger tight). Do not over torque
Antenna Placement Guide
GPS
For optimal GPS reception, install GPS antenna with a clear 360 degree view of the sky, such as on the roof of the vehicle.
Cellular antenna
For optimal cellular performance, install the cellular antenna on the roof of the vehicle, using the roof as a ground plane.
Antenna separation
It's recommended you separate the GPS and cellular antennas as reasonably far apart as possible, such as mounting at opposite ends of the roof.
- Note: - about 3 foot / 1 meter separation is ideal.
RJ45 CAN + Power connection
The RJ45 port provides connections for power and both CAN channels.
OBDII CAN cable
The RJ45 port is normally provided for the OBDII CAN cable accessory for a convenient plug and play OBDII connection
Custom Cable
You can also use a common RJ45 ethernet cable to provide power, ground and CAN bus data for a custom application.
| Connection | CAT5 EIA-T568B RJ45 cable |
|---|---|
| +12v | Brown |
| Ground | Orange/White |
| CAN 1 High | Orange |
| CAN 1 Low | Green/White |
| CAN 2 High | Blue |
| CAN 2 Low | Blue/White |
Note: These color codes assume EIA-T568B RJ45 cable (check printing on the cable to confirm)
Sensors
Analog Sensor inputs
9 analog sensor input channels are provided: 8 are available for dedicated sensors, plus a 9th internal channel assigned to battery voltage.
| Voltage Range | 0-5v |
| Input Impedance | Greater than 1M ohm |
| Voltage protection | 400v (intermittent) |
| ADC precision | 12 bit SAR |
| Maximum Sample Rate | 1000Hz (logging to SD card) |
| Mapping supported | Raw voltage / linear formula / interpolated map |
Connecting Sensors
Connect each analog sensor to the respective analog sensor input on the main connector.
See our comprehensive RaceCapturePro_Sensors Sensor Guide for information on connecting various types of analog sensors.
Frequency / RPM sensor input
You can connect RPM, wheel speed and other pulse-type sensors to RaceCapture/Pro frequency input pins.
