8) Connection Of The Electric Rev-Counter (Tachometer) - Rotax 912 ULS 3 Installation Manual

17.3.8) Connection of the electric rev-counter (tachometer)

The pick-up for the rev-counter generates one pulse per revolution. Pulse shape
and pulse voltage as per recordings (oscillogram).
speed 500 rpm (load 100 Ω Ω Ω Ω Ω )
speed 6000 rpm (load 100 Ω Ω Ω Ω Ω )
Effectivity: 912 Series
Edition 1 / Rev. 1
BRP-Powertrain
INSTALLATION MANUAL
See Fig. 67/79.
Feeding wiring to electric rev counter on left side of ignition housing.
- connections:
- length approx. 600 mm (24 in) starting from ignition housing.
◆ NOTE:
BRP-Powertrain developed especially for this applica-
tion a non-certified electric rev-counter. Certification
to the latest requirements such as FAR or EASA has
to be conducted by the aircraft manufacturer. See also
SI-13-1996, latest issue.
■ CAUTION:
The graphs depicting output signals have been deter-
mined and are effective only at the following condi-
tions.
Ambient temperature:
Tolerance:
(+V)
3
2
1
0
1
2
3
4
1 Umdr. (rev.)
(-V)
360°
(+V)
10
5
0
5
10
1 Umdr. (rev.)
(-V)
360°
2 flexible cables 0,5 mm
yellow (in insulation wrap)
speed 500 rpm (load 100 kΩ Ω Ω Ω Ω )
(+V)
15
10
5
0
5
10
15
1 Umdr. (rev.)
(-V)
speed 6000 rpm (load 100 kΩ Ω Ω Ω Ω )
(+V)
100
50
0
50
100
150
1 Umdr. (rev.)
(-V)
2
, white/yellow and blue/
20 °C (68 °F)
± 5%
Fig. 79
360°
00219
360°
page 118
May 01/2009