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2. Hardware
2.1 Specifications
System
CPU
SRAM
Flash Memory
WDT(watchdog)
Serial Ports
COM1
COM2
COM3
3G Interface
Frequency
GSM Interface
Frequency
Coding schemes
SMS Format
Power
Protection
Frame Ground
Protection
Required Supply Voltage
Mechanical
Casing
Dimensions(W x L x H)
Installation
Environment
Operating Temperature
Storage Temperature
Humidity
32 bit CPU
64K Bytes
512K Bytes
Yes
RS-232 : TXD,RXD,GND：Configuration and Debug
RS-232 : TXD,RXD,GND：Communicating with the Host
RS-485 : D+,D-：Communicating with the Host
WCDMA Quad-Band 850/900/1900/2100 MHz
Quad-Band 850/900/1800/1900 MHz
CS 1, CS 2, CS 3, CS 4
sending : UCS2 receiving : UCS2/7bits
Reverse polarity protection
ESD, Surge, EFT, Hi-Pot
+10 VDC ~ +30 VDC
Plastic
91 mm x 132 mm x 52 mm
DIN-Rail
-25 °C ~ +75 °C
-40 °C ~ +80 °C
5 ~ 95% RH, non-condensing
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SMS-531 User's Manual v1.1
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