Australian Monitor DMA1 - Manual (Page 8)

D E S C R I P T I O N A N D C O N N E C T I O N S
PA G E 8 A M I S - D M A 1 I N S TA L L AT I O N & O P E R AT I O N M A N U A L
3.3 Power supply
The DMA1 may operate with the following main power adaptors: 12-
15VAC, 12-24VDC.
It is recommended to use the mains adaptor supplied with the device. The
red POWER LED lights up when power is present.
3.4 Logic inputs
The DMA1 has eight multi-function logic inputs to control the playing of the
either playlists or individual audio fi les.
The pins are:
1- GND
2- IN 1
3- IN
4- IN 3
5- IN 4
6- IN 5
7- IN 6
8- IN 7
9- IN 8
In order to activate the playing of a fi le, connect the desired logic input pin
to GND (or the desired logic input pins when operating in binary logic).
3.5 IN/OUT 8 - input/output Vlink
Programmable logic input/output to connect two DMA1s in cascade, for
synchronised management of music playlists with commercials/spots at
scheduled intervals without interruptions.
Vlink: 0 = in standby
1 = in play (+12V)
3.6 Serial RS485 connection
The DMA1 can be connected to an RS485 bus that can be controlled by
a Crestron control system, or any other RS485 enabled control system.
To enable RS485 control, (pin IN5/485A and IN6/485B), remove the cover
of the DMA1 and move the relative jumpers (see para. 9.1).
3.7 Line level audio input
Line level audio input (stereo) allowing the connection of an external music
source (SAT, CD, Tuner, second DMA1 etc) that is mixed with DMA1 gener-
ated audio. This functionality allows the mixing of a music source with
scheduled commercials or spot announcements.
3.8 Line level audio output
Line level audio output (stereo) on extractable terminal strip.
3.9 Amplifi ed audio output
Amplifi ed stereo audio output (20W + 20W) for the connection of external
speakers.
Connect external 4/8Ω speakers to the SPK L/GND and SPK R/GND termi-
nal strip.
It is recommended to cable the DMA1 far from power cables. The two
cables that connect the speaker with the DMA1 amplifi ed audio output
terminals can be a potential source of interference.