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EM3028B is a state-of-the-art digital audio repeater which plays uncompressed Windows WAV files. It offers
the benefits of better sound quality over compressed file formats such as MP3 and WMA. Sound files are stored on a CompactFlash card for instant random access. CompactFlash cards, used in many digital cameras, are readily
available in many different sizes. It is possible to store more than an hour’s worth of CD quality audio on a single flash card.
EM3028B can be easily configured to work in different modes of operation. The most powerful
mode, the Script Mode, allows you to define a script of playback steps for each trigger. For example, you can play a file, wait a few seconds, play another file, then jump to another script. Or you can put the unit into an
endless play loop which may be interruptible or non-interruptible.
Designed to be a stand alone device, EM3028B can be powered by a single voltage supply and output to speakers directly. Playback can be triggered by a
number of devices such as push buttons, motion sensors and PLCs. Standard interfaces include parallel, RS-232 and RS-485. Keypad and other custom interfaces are available by special request. The built-in 40-watt power amplifier
eliminates the need for an external amplifier in most cases. Should further amplification is ever needed, a line level output is also supplied.
EM3028B is also available without the metal enclosure. The model number for
the circuit board is DM3028B.
EM3028BR
EM3028BR provides the same functions as EM3028B but adds eight relay outputs for Basic Audio-n-ActionTM control. The relays can be programmed to turn on/off before and/or after, but not during, a file playback.
EM3028BX
EM3028BX provides the same functions as EM3028B but adds eight relay outputs for Advanced Audio-n-ActionTM control. The relays can be programmed to turn on/off at any time. The Windows-based QWAplay program (available upon request) is required for embedding the event timing into the WAV file. The following is a screen shot sample.
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