Technical Information:
This information is provided for the technically curious and otherwise insane user. There is no need
for most users to read or understand this section. The manufacturer of this
ALFA
Clock/Odometer
takes no responsibility for damage caused to or by, this or any other equipment, when created or
wired by the user.
The 9 Pin DB9 male connector on the right side of the ALFA is its outlet to the rest of the world. The
pins are defined as follows:
1. 12-volt DC power Input. The
ALFA
requires a minimum of 6-volts DC to operate. Power
consumption is approximately 15ma without the backlight, 50ma with the backlight full bright.
2. Serial communications Output. (0-5v signal, idle high)
3. Serial communications Input. (Accepts either 0-5v signal or RS-232)
4. Remote Hold Input. (Ground to trip input)
5. Ground.
6. 5-volt, ½ amp output. (May be used to power external sending unit or other devices)
7. GPS Serial Input. (9600bps, NMEA-183 data stream, 3.3v max)
8. Odometer Input. (Negative edge triggered)
9. Mode Switch Input. (For use with ALFA-Elite and ALFA-Pro only)
ALFA-Club Owners Manual
10
Female DB9 connector as
viewed from the solder side
