13)Connection Of The Electric Rev-Counter (Tachometer) - Rotax 914 series Installation Manual

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

See Fig. 69/84.
Feeding wiring to electric rev counter from the 36 pole receptacle of TCU.
-
-
◆ NOTE:
■ CAUTION:
Ambient temperature:
Tolerance:
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 )
(+V)
3
2
1
0
1
2
3
4
(-V)
speed 6000 rpm (load 100 Ω Ω Ω Ω Ω )
(+V)
10
5
0
5
10
(-V)
Effectivity: 914 Series
Edition 2 / Rev. 0
BRP-Rotax
INSTALLATION MANUAL
connections: flexible wire 0,75 mm
flexible wire 0,75 mm
* from the 36 plug receptacle of TCU without plug connection
length approx. 1000 mm (40 in) from TCU.
BRP-Rotax developed especially for this application a non-
certified electric rev counter. Certification to the latest require-
ments such as FAR or EASA has to be conducted by the
aircraft manufacturer. See also SI-13-1996, latest issue.
The graphs depicting output signals have been determined
and are effective only at the following conditions.
Fig. 84
1 Umdr. (rev.)
00219
360°
1 Umdr. (rev.)
360°
2 (18 AWG) white No. 26*
2
(18 AWG) white No. 13*
20 °C (68 °F)
± 5%
speed 500 rpm (load 100 kΩ Ω Ω Ω Ω )
(+V)
15
10
5
0
5
10
15
1 Umdr. (rev.)
(-V)
360°
speed 6000 rpm (load 100 kΩ Ω Ω Ω Ω )
(+V)
100
50
0
50
100
150
1 Umdr. (rev.)
(-V)
360°
page 125
July 01/2008