The MA32 sound card has been specifically designed for use in elevators for various announcements like "ground floor", "please clear the entrance", "going up", etc.
MA32 features
* Operates from 24V elevator power supply (can be modified for 12V operation).
* 16 opto-isolated trigger inputs, 0V - 24V logic, active high.
* Three types of triggering options: 1 - independent inputs, each trigger will play an announcement allocated to it, max number of announcements is 16; 2 - binary code, the announcement number to be played is presented to the inputs as a binary number; 3 - Gray code, the announcement number to be played is presented to the inputs in Gray code, both the binary and Gray codes allow to play more than 16 announcements.
* 5W mono power amplifier for external speaker.
* Plays standard multimedia 16-bit 11.025 kHz linear PCM (wav) files.
* Playback from EPROMs to assure reliability and extended voice data retention even when operating in high temperatures.
* Accepts one or two 4Mbit or 8Mbit EPROMs.
* Maximum playback time for all announcements: 45 sec - with one 8Mbit EPROM, 90 sec - with two 8Mbit EPROMs.
* Programming EPROMs can be done by Microcontrol for a nominal fee. A development system is also available to enable programming EPROMs with voice files by the user.