Effectivity: 914 Series
Edition 2 / Rev. 0
d04282
page 125
July 01/2008
BRP-Rotax
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.
- connections: flexible wire 0,75 mm
2
(18 AWG) white No. 26*
flexible wire 0,75 mm
2
(18 AWG) white No. 13*
* from the 36 plug receptacle of TCU without plug connection
- length approx. 1000 mm (40 in) from TCU.
◆ NOTE: 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.
■ CAUTION: The graphs depicting output signals have been determined
and are effective only at the following conditions.
Ambient temperature: 20 °C (68 °F)
Tolerance: ± 5%
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
ΩΩ
ΩΩ
Ω) speed 500 rpm (load 100 k
ΩΩ
ΩΩ
Ω)
1 Umdr. (rev.)
360°
0
(+V)
(-V)
1
1
2
3
2
3
4
0
(+V)
(-V)
5
5
10
15
10
15
0
(+V)
(-V)
5
5
10
10
1 Umdr. (rev.)
360°
1 Umdr. (rev.)
360°
1 Umdr. (rev.)
360°
0
(+V)
(-V)
50
50
100
100
150
Fig. 84
00219
speed 6000 rpm (load 100
ΩΩ
ΩΩ
Ω) speed 6000 rpm (load 100 k
ΩΩ
ΩΩ
Ω)
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