KIT - P/SATSPEED
GPS Speed Interface
Installation, Calibration and Operation
Doc. No. S/DC/500-10-592 : Issue 2 : 28/8/09
Page 1 -
UK592200.DOC
Part No.
Description
Qty
S/SR/385-1-001
Satspeed Interface
1
S/CBL/TIE/001
Cable Tie
25
Application
The Satspeed Interface converts GPS data to a pulse signal compatible with a radar sensor. It is suitable for any
instrument that cannot accept a GPS input directly, but which uses a pulse input for the forward speed signal.
Input:
Any GPS receiver that outputs an NMEA VTG message via serial RS232, 9-way D connector.
1Hz – 5Hz ; 4800, 9600 or 19200 baud,
Output:
128.16 pulses/metre
(3.255 pulses/inch)
0.0078 metres/pulse (0.307 inches/pulse)
Limitation
This unit should not be fitted in situations where speed measurement <1km/hr is required, or there is consistent
poor quality GPS reception.
Installation
Connect to the system junction box / Terminator, Forward
Speed input terminals, as for a radar sensor i.e.
The 9-way D connector (pin 9) also provides a power supply
(Vss) for the GPS antenna/receiver, fed through the yellow
wire. The ‘RDS GPS-16 Satspeed’ antenna/receiver can use
this power supply.
Ensure that the GPS antenna/receiver is wired to accept a
voltage supply on pin 9 of the D connector. Connect the
yellow wire together with the red wire to a +V supply.
Wire Colour Function
Red
+V (10 – 30V supply)
Blue
0V
Green
Signal
Yellow
Antenna Power Supply
Pin Out
Function
1
-
2
Rx
3
Tx
4
-
5
0V
6
-
7
-
8
-
9
Vss (10 –30V)
