Specifications
Parallel Outputs
Two status outputs are provided. They are dry contact closures rated at 24 VDC and
0.9 amp max. Their function is described below.
Function Pins Description
Playing 9,28 Closed when the unit is playing.
Fault 10,29 Closed when the unit detects a fault
condition.
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The Digital Audio Machine may be controlled using serial RS-232 messages via
either the front DB-9 Programming Connector or the rear DB-37 Control Connector.
The programming connector is usually used during one-time setup from a PC, or in a
kiosk or other surface mount installation. The DB-37 connector is used in rack mount
installations to eliminate wiring to the front panel. The data format is 9600,N,8,1:
9600 baud, 8 bits/byte, no parity, with one stop bit. The protocol is ASCII-based, and
many commands are identical to Pioneer Disc protocol. Upper or lower case
characters can be used interchangeably.
The most commonly used serial commands are:
Command Function
Select File Select a file
Play Play the selected file
Loop Play Play the selected file over and over
Pause Pause at current location. The Play
Command resumes playback.
Serial commands are
“drive specific”. The
removable media does
not take precedence
over the internal drive.
Unlike the parallel file select inputs, serial commands refer to the currently selected
media. On power up the Digital Audio Machine defaults to select the internal drive
(if installed). In this configuration, refer to the section titled “Advanced Serial
Protocol”.
The details of these commands are listed below. Many other commands are also
possible, and are summarized in the section entitled Advanced Serial Protocol.
Unless otherwise noted, all of these commands operate on any type of file, whether
audio track or Play List. Throughout the table <CR> means carriage return, a byte
with the hexadecimal value 0D.
Select File
Description: This command causes the Digital Audio Machine to select the specified audio track
or Play List on the currently selected media. Once this command is sent, the next