- Stock: In Stock
- Tacho Hellas CODE: 81020824
- Manufacturer CODE: 81020824
- Dimensions: 8.00 x 4.00 x 2.00
- Weight: 0.04
GPS Speed Pulse Module
Specification and Installation
Description
This product uses GPS technology to generate a road speed pulsed output. The output pulses at a frequency proportional to road speed. The interface is easy to install and utilises a built-in antenna. It is suitable for 12v and 24v vehicle electrical systems.
Operation
The unit requires a +12/24v permanent (battery) supply in order to maintain open sky hot start capability. When the ignition is switched off, the unit enters a low-current mode but maintains the GPS data required for a ‘Fix’ for a period of up to 3 hours.
An on-board bi-colour LED (surface mounted on the PCB immediately to the right of the connector) will flash Orange 3 times when the unit is first powered from the permanent supply.
The LED will indicate the state of the interface as follows:
Red LED on No Fix
Green LED on solidly Fix
Green LED flashing Fix and road speed signal greater than zero
Wiring
Red + 12/24v Permanent Supply
Black 0v Vehicle Earth
Purple +12/24v Ignition
Green Speed Pulse Output
Installation
The unit should be installed with a clear view of the sky without any metal obstruction. A label on the enclosure indicates the correct orientation of the unit. If these criteria are not met, acquisition time will be greater and performance reduced. A suitable installation would be mounted directly underneath the dashboard, with no obstruction, as close to the windscreen as possible.
Speed Pulse Output
The digital output pulses between 0v and +12/24v at a frequency of 1 Hz / MPH. Different calibrations are available on request.
Specification
Supply Voltage 9.0v to 32.0v d.c.
Supply Current Operating 35 mA typical
Standby 5 mA maximum
Speed Pulse Output 1 Hz / MPH (3600 pulses/mile, 2237 pulses/km)
Output Current = 100 mA maximum
Acquisition Cold Start 28 seconds typical
Hot Start 2 seconds typical
Operating Temperature -40 to + 85 deg C
Dimensions (including mounting lug) 65 mm x 44 mm x 16 mm