Specifications

Ground Lift
Be sure to configure the
Digital Audio
Machine’s switches
before rack mounting
the units, or the
switches may be
inaccessible.
In the event of AC hum or noise, this switch, located at the rear of the left side of the Digital
Audio Machine, may be opened to isolate the Digital Audio Machine’s ground from its
chassis.
Voltage / Contact Closure Select Switch
This switch, located on the side of the unit next to the DB-37 Control Connector
selects between voltage inputs or contact closures for the discrete controls. More
information on these inputs may be found in the section entitled Rear Panel
Connectors.
Power
The power input is a 2.5x5.5x10mm barrel connector with center pin (+) and the
outer rim (-). The Digital Audio Machine requires 15.0 VDC to 27.0 VDC at 1 Amp.
DO NOT EXCEED THE SPECIFIED INPUT VOLTAGE RANGE. An external 115
or 230 VAC power supply is provided with the unit.
If the optional internal IDE drive is not installed, the Digital Audio Machine can be
powered from as little as 8 VDC. This is useful for mobile applications where an
automotive battery is used to power a Flash Card or PC-Card hard drive.
RS-232C Programming Connector
A serial cable is
provided with each
Digital Audio Machine.
This input is a standard DB-9 male RS-232C connector, intended to be connected to
a PC using a straight-through (not null-modem) 9-pin cable. Usually this connector is
used only during programming, and not once the unit is permanently installed. The
pinout appears below.
Pin Function
2 TXD (data from Digital
Audio Machine)
3 RXD (data to Digital Audio
Machine)
5 GND
For convenience of rack wiring, these signals are duplicated on the rear DB-37
connector. This eliminates the need for front panel cabling in rack mount
installations.
Only one serial connection should be attached at a time.