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Tripmeter H-51 | Specifications
Service – basics | Service during a rally
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Tripmeter H-51 connections
The manual includes a description of the connectors and the order of the wires.
Make the connection to the vehicle’s installation using the cable supplied with the tripmeter H-51 and the diagram below:

| Pin no. in plug | Power connector 9 PIN male | Colour of wire in the bundle |
| 1 | constant power supply 10-30V (the tripmeter does not have a switch. If you do not have a plane in your vehicle, you can use an additional switch.) | red |
| 2 | mass | brown |
| 3 | ignition switch (connect it together with the red one to a constant power supply, then the tripmeter will not go to sleep in the start screen and menu, or connect it to the ignition switch to maintain this function) | yellow |
| 4 | road signal P1 (speed sensor) | white |
| 5 | road signal P2 (speed sensor) | pink |
| 6 | external reset 1 (supports single and three-button reset buttons) | blue |
| 7 | external reset 2 ( inactive ) | green |
| 8 | reverse driving signal (connect to the wire on which “+” appears when reverse gear is engaged or connect to a switch that will simulate reverse driving) | grey |
| 9 | free |
Connection to repeater
This tripmeter does not work with a repeater.
Accessory connector
The accessory connector is used to connect a repeater, Garmin device or speed warning light.
ALWAYS use accessories available in our store. We do not recommend any other use of this connector.
| Pin no. in plug | Accessory connector |
| 1 | constant power supply 10-30V (the tripmeter does not have a switch. If you do not have a plane in your vehicle, you can use an additional switch.) |
| 2 | mass |
| 3 | RS232 RXD |
| 4 | RS232 TXD |
| 5 | mass |
| 6 | output 1, max. 5mA!!! – (since version 3.70.09 Speed limit) |
| 7 | do not use |
| 8 | do not use |
| 9 | free |