RS485 Serial MP3 Player 20 Trigger Audio Player MP3 Sound Board

Features

1. Built-in a high quality 24bit of audio decoder with stereo audio output.

2. Supports to play audio files of MP3 and WAV formats.

3. Equipped with a high quality 25Wx2 class D amplifier to directly connect with two 8 ohm speakers of 10-25 Watts, for left channel and right channel.

4. Built-in 16MB SPI flash memory and supports max. 32GB micro SD card.

5. Supports RS485 serial mode and button control mode.

6. In button control mode, playback of the one-on-one associated audio files are triggered by negative pulse to any of the 20 input terminals.

7. In button control mode, possible playback of 255 MP3/WAV audio files per 20 one-on-one associated folders through negative trigger.

8. In button control mode, four select-able triggering modes are provided through a configuration file.

9. Supports audio output to an external amplifier through the 3.5mm female audio jack.

10. Separate volume control for each sound channel (only for on-board amplifier).

11. Wide range for power input DC (12V - 24V).

12. Industry-grade design and strong anti-jamming capability.

Technical Parameters

1. Power input: 12V-24V DC

2. Rated output: 25W×2 (RL= 8 Ω d =1%)

3. Noise Voltage: ≤50m V

4. Frequency response: 20-20KHz

5. SNR: ≥ 90dB

Connections

The terminals A(+) and B(-) are used to connect with a RS485 controller, while K1 through K20 represent Normally Open (N.O.) manual buttons. Please refer to the connection example below.

Dimensions