Northern Airborne Technology AMU50-001 - Manual (Page 19)

AMU50-001 Audio Management Unit
SM76 Installation and Operation Manual
Section 2 Rev: 1.04
Issue 1 Page 2-7
ENG-FORM: 805-0120.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
The AMU50 will communicate with the RM01 to verify and download configuration data from the RM01 if
the Weight On Wheels input is grounded when power is applied to the unit, or the AMU50 mode is
changed using the ACP Mode Control switch. If the Weight On Wheels input is not grounded, the AMU50
will use internally stored configuration data. This is intended to minimise start up delay if power to the
AMU50 is cycled in flight, or if the AMU50 mode is changed using the ACP Mode Control switch.
This input is operational with the AMU50 configured in all modes.
2.4.4.6.9 Winchman Select (ACP 1 WINCHMAN SELECT thru ACP 3 WINCHMAN SELECT)
The winchman position is User 7. By using an external 4-position rotary switch to ground one of the
Winchman Select pins (J101 pin 46 or 48, J102 pin 46), the winchman position can be associated with
ACP 1, 2 or 3 and will adopt all the features associated with that ACP. If no winchman input is active, or
more than one winchman input is active, the winchman returns to the pre-programmed ACP assignment.
This input is operational with the AMU50 configured in Normal mode only.
2.4.4.7 Interconnect Outputs
2.4.4.7.1 Aural Alert Active output (ALERT ACTIVE)
The Aural Alert Active output becomes active when any of the Aural Alert messages are being played.
(This includes the delay between alert repetitions, and between overlapping alert messages).
This output is operational with the AMU50 configured in all modes.
2.4.4.7.2 DF Blanking Output
The DF Blanking output is operational in Normal and Backup Modes, and becomes active when any TX
PTT output is active, with a maximum delay of 1 ms.
This output is operational with the AMU50 configured in Normal and Backup modes only.
2.4.4.7.3 Emergency Mode Active Output (EMERG/BACKUP OUT)
The Emergency/Backup Active output becomes active when the system is in Emergency Mode or Backup
Mode.
This output is operational with the AMU50 configured in Backup and Emergency modes only.
2.4.4.7.4 Crew Isolation output (CREW ISO OUT)
The Crew Isolation output becomes active and stays active while the crew members are isolated from the
passengers. While the isolation mode is temporarily deactivated because of an Isolation Override Call,
the Crew Isolation Output is also deactivated.
This output is operational with the AMU50 configured in Normal mode only.