Eletech EM21D User Manual

Technical Specifications
Firmware Version
1.0
Operation Mode
Playback only
Sound File Format
Mono/stereo MP3 (ISO 11172-3 up to 44.1KHz)
Max. Number of Sound Files
- TRG operation: 99 per group
- Keypad operation: 999
- Timer operation: 99 per group
Max. Number of Groups
10 (TRG and Timer)
1 (Keypad)
Memory Card Type
SD/SDHC (FAT/FAT16 or FAT32 file system)
Max. Memory Capacity
- 2 GB for SD (FAT/FAT16)
- 32 GB for SDHC (FAT32)
Storage Requirement
57.6MB/Hour @ 128 kbps
Supply Voltage
12 ~ 30 VDC
Typical Standby Current
60 mA
Audio Output
(30V supply, 8 Ohm load, 10% THD+N)
- High efficiency class D
- Stereo: 15W per channel
- Mono: 55W bridge tied load (BTL)
Trigger Interfaces
- TRG (dry contact closure or PLC)
- Keypad, 3x4
- Internal timer (automatic)
Physical Dimensions
EM21D User's Manual
Inputs, Outputs & Controls
POWER LED
This light is lit when power is applied.
POWER JACK
Power input option 1, 2.1x5.5mm center positive coax jack. Internally connected to VDC/GND.
VDC / GND
Power input option 2, screw terminals. Internally connected to the power jack.
TRG
Input for a trigger signal/mechanism (TRG Mode).
BSY
An open drain output for optional external device control directly or via a relay.
KEYPAD
Input connector for an optional 3x4 keypad (Keypad Mode).
AUX
Input connector for an optional SU-20 motion sensor (TRG Mode).
VOL
Volume knob that controls both the speaker outputs and the line out.
LINE OUT
A 3.5mm stereo phone jack with audio output for headphone or external power amplifier.
LEFT / COMMON / RIGHT
The speaker outputs.
SD CARD
Supports SD (FAT16) and SDHC (FAT32) cards. Power must be off when inserting the card.
CONFIG
A 4-position DIP switch for system configuration.
Typical Wiring Diagram for Push Button Activation
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