ALM-04-MRTU User’s Manual
ALM-04-MRTU
User’s Manual (Rev1.0, Jan./2020) ------------- 7
Table 1-2
:
I/O Specification
Digital Input
Channels
4
Input Type
Dry Contact: Sink
Dry Contact Level
Off Voltage Level: Open
On Voltage Level: Close to GND
Photo-Isolation
3750 VDC
Input Condition
Pulse Width must > 150mSec or more
Digital Output
Channels
1
Output Type
Form A
Contact Rating (Resistive Load)
DC50V/100mA
Table 1-3
:
Audio Specification
Audio
Sound Pressure Level
99dB@1KHz/1meter
Volume Control
Digital Volume Control
Number of Playback
64(Max)
Audio File Format
MPEG1-Audio Layer Ⅲ (MP3)
Sample Rate
24/44.1(prefer)/48 KHz
Bit Rate
32 64 96 128(prefer) 160 192 kbit/s
Audio Startup Time
< 150ms
Audio Output
3W(Max)
Line Out Impedance
1KΩ
Table 1-4
:
Storage Specification
Storage
Audio Files Locate
Micro SD(T-Flash) up to 32GB, bundle 4GB
File System
Fat16/32
File Transfer
PC Editor Utility, Copy to Micro SD
