MD Helicopters 369-500, Инструкция по техническому обслуживанию

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MAINTENANCE MANUAL
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1999 − 2016 by MD Helicopters, Inc.
Table 111. Input/Output Signals − Autronics EPO Warning Control Unit (Cont.)
Connector
J21 Pin
Signal or Control Name Connector
J22 Pin
(P19)
Signal or Control Name
N
1
indication of
50 − 55%
(accurate indica-
tor)
K
C
Not used
Audio warning
tone No. 1
Interrupted 680 to
1700 Hz, 0.9 + 0.1 V
ac into 16K ohm load;
interrupted 120 + 40
times/minute, ac
voltage present for
min. 25% − max. 75%
of interrupt rate
period.
D
M
Audio warning
(not used)
Audio warning
tone No. 3
Same as J21, pin C.
Same as J21, pin C;
except 18.5 + 2 Vac
into 100 ohm load.
J Audio tone
enable ground
Airframe ground
Presence of this input is required for
output at J21, pins C, D and M.
B
E
Supply input
voltage
Ground
28 Vdc
Airframe ground
Presence of these inputs required
for all EPO warning control unit outputs.
L N
R
tach gen Ac voltage, 68.6 Hz or
less (Models 369D/E
helicopters with C20
engine), 66.5 Hz or
less (Model 369FF
helicopters with C30
engine).
F
K
M
C
D
Same as above
Same as above
Audio warning
tone No. 3
Same as above
Same as above
Same as above.
Same as above.
Same as J21, pin C;
except 18.5 + 2 V ac
into 100 ohm load.
Same as above.
Same as above.
G N
R
sensing and
audio tone No. 3
disable
Airframe ground
Presence of this input is required to
prevent outputs at J21, pins F, K, C, D
and M with input at pin L. (Ref. Note 3)
NOTES:
(1) All ac voltage levels are peak − to − peak on calibrated oscilloscope.
(2) N
1
and N
R
sensing inputs produce all associated outputs listed, when other required indicated inputs are
present.
(3) At removal and reapplication of input at pin G, outputs occur 3.5 seconds after reapplication due to internal
time − delay circuits.