MD Helicopters 369-500, Maintenance Instructions Manual

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CSP-HMI-3
MD Helicopters, Inc
.
MAINTENANCE MANUAL
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95-30-00
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1999 − 2016 by MD Helicopters, Inc.
Table 112. Input/Output Signals − Voice Warning LRU (600N4514 − 3/ − 5)
Pin Description Function Voice message
A Input fron N1 sensor Detects frequency below 9817 HZ (ECU
manual mode)
Engine out
B Power input 23 − 30 Vdc (Bus) N/A
C Output Audio out, 100 Mw into 600 Ohms N/A
D Input Contact to ground Fuel flow fixed
E Input Power ground N/A
F Input Contact to bus from FADEC Engine out
G Audio in ( − 5 only) Audio from COMM N/A
H Input Case ground N/A
K Input Detects voltage above 2.98 Vdc Power
L Input from rotor sensor Detect frequency below 1321 HZ Low rotor
P Input Contact to bus Voise warning test
S Input Contact to bus Fire
T Input Contact to ground E.C.U. manual
U Output Bus voltage out to ignition exciter if in ECU
manual and low N1 or low rotor
N/A
NOTE:
Pins J, M, N & R are not used − 3 or − 5.
Pin G not used on − 3.
Table 113. Input/Output Signals − Voice Warning LRU (600N4515 − 1)
Pin Description Function Voice message
A Input fron N1 sensor Detects frequency below 9817 HZ (ECU
manual mode)
Engine out
B Power input 23 − 30 Vdc (Bus) N/A
C Output Audio out, 400 Mw into 75 Ohms N/A
D Input Contact to ground Fuel flow fixed
E Input Power ground N/A
F Input Contact to bus from FADEC Engine out
G Audio in ICS audio N/A
H Input Case ground N/A
J Output Audio 2, 400 Mw into 75 Ohms N/A
K Input Detects voltage above 2.98 Vdc Power
L Input from rotor sensor Detect frequency below 1321 HZ Low rotor
P Input Contact to bus Voise warning test
S Input Contact to bus Fire
T Input Contact to ground E.C.U. manual
U Output Bus voltage out to ignition exciter if in ECU
manual and low N1 or low rotor
N/A
NOTE:
Pins M, N & R are not used.