The Digital Audio Control System (DACS)is a communications management system with the ability to distribute and control all audio in an aircraft, to/from all transceivers, receivers and audio warning sources. The integrated, multi-channel intercom system and programmable user definition allow the audio system to be configured to suit customer specific communication schemes.
The major components in the system are Audio Control Panels (ACP51 and/or ACP53), Audio Management Unit (AMU50), Remote Memory (RM01), and optional Passenger Intercom Amplifier (PIA01). The primary component in the system is the Audio Management Unit. Connected to it are transceivers (up to 8), receivers (up to 8), Direct Audio inputs (up to 6), Audio Control Panels (up to 6) and one Passenger Intercom Amplifier (PIA). The Audio Management Unit distributes all radio audio to each user and to the Passenger Intercom Amplifier. Seven headsets can be connected to the Audio Management Unit (basic configuration is two crew and five passengers). Each passenger headset can also be assigned to a specific ACP, upgrading the passenger to a fully capable crewmember. More than one headset can be assigned to an ACP. The system architecture is a star configuration (separate serial connections to each Audio Control Panel and Passenger Intercom Amplifier) to prevent loss of the entire system because of a failure of one connection.
规格：
Weight:
4.11 lb (1.87 kg)
Dimensions:
2.23 x 7.48 x 11 in
Power:
27.5 VDC, 2.5A nominal
Microphone Inputs:
7 input, 3 selectable impedances
5Ω (250 µVrms), 75Ω (850 mVrms), 150Ω (250 mVrms)
Headphones:
7 output, 3 selectable impedances
8Ω (250 mW), 150Ω (250 mW), 600Ω (250 mW)
Radio Audio Inputs:
16 inputs, 1 Vrms – 20 Vrms input range, 600Ω input impedance
Radio Mic Outputs:
8 outputs, 50 mVrms – 1 Vrms output range, <60Ω output impedance
Radio PTT Outputs:
8 Outputs, active Lo
Direct Audio Levels:
6 inputs
fixed audio output levels
1 to 15 Vrms input range
600Ω input impedance
CVR Outputs:
2 CVR outputs
One for pilot and one for co-pilot
<600Ω output impedance
500 mVrms output
Aural Warnings:
8 internal alerts, messages in .WAV files assigned by configuration management software, may be active Hi or Lo
DF Blanking Output:
1 blanking output, active Lo
Music Inputs:
2 inputs, 2 input ranges – 400 mVrms
or 2.5 Vrms, 1000Ω input impedance
ACP/AMU Protocol:
RS-422
Lighting (audio control panels):
5/28V standard, 5V optional, NVIS compliant versions optional
特征：
DACS Features:
Fully-digital audio processing & control
Designed for tactical operations
Reduced system weight due to reduced wiring compared to legacy analog systems
Cockpit & cabin control configurations available
Manages up to 8 receivers, 8 transceivers
Remote-mount management memory units
Interface audio levels, discretes, and multiple system functions are on-site software configurable using Device Configuration Software (DevCS)
Low cost of ownership
FAA: TSO-C139 (RTCA/DO-214 Class 1b, RTCA/DO-160E,RTCA/DO-178B Level C)
EASA: ETSO-C50c (RTCA/DO-214 Class 1b, RTCA/DO-160E, RTCA/DO-178B Level C)
