Dakota Digital 3X Series Troubleshooting Guide download pdf

1 MAN #650398:A

GPS-50-1

GPS Speed and Bus Interface Module

BATTERY

GROUND

I/O

SPEED 2

ACC PWR

SPEED 1

www.dakotadigital.com

[email protected]

605-332-6513

GPS-50-1

GPS INTERFACE

CRUISE

To gauge control box

or another BIM

Connect to main

chassis ground

+12V CONSTANT BATTERY POWER

(fused 5 - 20 AMP max)

+12V KEY ON POWER

(fused 5 - 20 AMP max)

setup/status switch

AC speedometer output.

Standard speedometer output.

Cruise control speed output.

This Bus Interface Module can be used to provide an accurate speedometer signal with most manufacturers’ gauges and

also with a Dakota Digital system to provide speed, compass, clock, and altimeter functions. There are two speedometer

outputs to work with standard speedometers and a dedicated cruise control output. There are two interface (I/O) ports on

the module for use with a Dakota Digital gauge system. Either one can be connected to the gauge system or to another

module, allowing several units to be daisy chained together. Do not connect the I/O port to anything other than a Dakota

Digital gauge or BIM. Do not mount the module in the engine compartment; it should be mounted in interior of the vehicle.

Make sure the module is securely mounted and not hanging loose. It uses an internal acceleration sensor which

cannot accurately track the vehicle acceleration if it is loose.

The speed data does not use one of the 16 available bus ID’s like other Dakota Digital BIM units do. Speed data is

transmitted and updated every 0.1 second. The remaining data is sent one at a time in sequence along with any other

BIM modules present on the system.

The GPS speed signal can be momentarily incorrect due to interference from overpasses, tunnels, and nearby structures.

To avoid this problem, the system stabilizes the speedometer reading by constantly comparing it with an internal

acceleration sensor. When the key is off, the system goes into a very low power standby mode and only occasionally

wakes up to update GPS readings so that it is ready to start operating as soon as the key is turned on.

Initial setup

Once the module is mounted securely and wired, there are a few internal tasks the GPS module will complete on its own.

First, the module needs time to acquire and track the satellites. This typically won’t work inside a steel building, so have

the vehicle outside to speed up the process. There is a dot in the upper right of the display that will be on steady or on

and flashing any time the key is on. The dot in the top center of the display will be on steady once it has gotten a GPS

satellite fix. The unit won’t operate until it gets a fix and this may take 1 – 15 minutes depending on various things. This

delay is only for the initial GPS fix. After this it will typically begin operating within a few seconds of turning the key on.

The second step is to let the internal acceleration sensor learn how it is mounted in the vehicle. You can mount it

securely in any position you want. When you are sitting still it learns which way is up. In order to learn which way is the

front of the vehicle you need to accelerate or decelerate on a straight stretch of road. Accelerate or decelerate for at least

2.5 seconds and make sure your speed changes by at least 10 mph. This procedure only needs to be done initially and

doesn’t need to be repeated unless you move the module to a different mounting location.

If you move it to a new mounting location or a different vehicle, enter the setup menu and select the  option to speed

up learning the new mounting position.

IMPORTANT NOTE! When used to operate a cruise control, see the special

mounting requirements on the bottom of page 4.

1 2 3 4 5 6

GPS-50-1 1
Troubleshooting guide 5

Summary of Contents

Page 1 - GPS-50-1

1 MAN #650398:A GPS-50-1 GPS Speed and Bus Interface Module BATTERYGROUNDI/OI/OSPEED 2ACC PWRSPEED 1www.dakotadigital.comtechsupport@dakotadigi

Page 2

2 MAN #650398:A Dakota Digital display data usage The speed outputs can each be used in place of a separate transmission connection to the gauge con

Page 3

3 MAN #650398:A To set or change the GPS clock ID number and the time format:  Hold the switch beside the GPS-50-1 terminal strip while turning the

Page 4

4 MAN #650398:A Using an electric speedometer with the GPS-50-1. The speedometer signal input should be connected to either SPEED 1 or SPEED 2 depend

Page 5 - Troubleshooting guide

5 MAN #650398:A Troubleshooting quick tips: While the GPS-50-1 is operating, the dot in the upper left corner of the display will indicate the statu

Page 6

6 MAN #650398:A GPS-50-1 Specifications SUPPLY VOLTAGE Battery Power 6 to 22 V Accessory Power 6 to 22 V SPEED OUTPUTS Update Rate 10 Hz SPEED 1 Gro

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