Audio International, Inc.
DVD-021-0x-x Installation & Operation Manual
Document # 540125, Rev B, 12/2000
Page 10 of 31
4.4 AI’s Proprietary RS-485 Data Bus
4.4.1 The DVD-021-0x-x is designed to interface with other Audio
International equipment via AI’s proprietary RS-485 serial data bus.
The data bus shall be implemented using a twisted shielded pair
cable in accordance with the standard military specification of
MIL-DTL-27500 or equivalent. The wire size for the conductors in
this cable shall be 22 AWG, MINIMUM. The shield shall be
connected everywhere a shield pin is provided. Shield terminations
shall be made as close to the connector pin as possible.
4.4.2 All modules on AI’s proprietary RS-485 data bus shall be connected
in a ‘daisy-chain’ configuration. AI’s proprietary RS-485 data bus
specification is available upon request.
5.0 Physical Characteristics
5.1
Refer to Section I, Unit 5.0 for unit dimensions.
5.2
Refer to Section II, Unit 9.0 for attachment points.
5.3
When mounting the unit, allow sufficient space for mating connectors.
5.4
Allow a minimum of 1" air space around the unit to allow for proper air
circulation to prevent the build-up of internal heat.
6.0
Electrical Characteristics
6.1 Electrical
Specifications:
Electrical
Power 750
mA
at +28 VDC
Operating Voltage Range
+18 VDC to +32 VDC
Data Bus Type
AI Proprietary RS-485
Audio Frequency Response
4 Hz to 20 kHz
Audio Output
1 V to 3 V
RMS
into 330
(factory preset at 2 V
RMS
)
Audio S/N
>96dB (NOMINAL)
Video Output
1V (p-
SLQWR
Vertical Resolution
525 Lines
Horizontal Line Resolution
720 Pixels / Horizontal Line
Video Input / Output Format
DVD-021-01-x Region 1
(NTSC only)
DVD-021-03-x
Multi-Regional
(NTSC & PAL)
Infrared Signal Input
+5V digital logic level
