Signshine S3321 GPRS DTU is a kind of cellular terminal device with RS232/RS485 that provides data transfer function by public GPRS network Industrial GPRS RS232 RS485 DTU adopts high-powered ARM9 CPU and embedded real time operating system, integrates all the commonly used protocols, such as TCP/IP/UDP and so on, from logical link layer to upper application layer protocols. It provides a secure, high speed, reliable wireless internet connection for customers and supports several ways that trigger DTU to be online, including SMS and data. It also supports double or several data centers. This GPRS DTU has been widely used in M2M/SCADA field,such as power automation, transportation, financial service terminal, factory automation, water, oil&gas, large machine maintenance, environment, building automation, outdoor digital signage ect.

1. 厦门信辰信息科技有限公司
XiamenXiamenXiamenXiamen SignShineSignShineSignShineSignShine InformationInformationInformationInformation TechnologyTechnologyTechnologyTechnology Co.,.LtdCo.,.LtdCo.,.LtdCo.,.Ltd
Address：905A, Block C2, No. 5 JinZhong Road ,Huli District, Xiamen, China 361009 Phone：0592-5538731
Website：http://www.signshine.cn./en/ Fax ：0592-5597794
S3321 GPRS DTU
Technical Specification
www.signshine.cnwww.signshine.cnwww.signshine.cnwww.signshine.cn/en//en//en//en/
厦门信辰信息科技有限公司
Xiamen SIGNSHINE Information Technology Co; Ltd

2. 厦门信辰信息科技有限公司
XiamenXiamenXiamenXiamen SignShineSignShineSignShineSignShine InformationInformationInformationInformation TechnologyTechnologyTechnologyTechnology Co.,.LtdCo.,.LtdCo.,.LtdCo.,.Ltd
Address：905A, Block C2, No. 5 JinZhong Road ,Huli District, Xiamen, China 361009 Phone：0592-5538731
Website：http://www.signshine.cn./en/ Fax ：0592-5597794
GeneralGeneralGeneralGeneral
Signshine S3321 GPRS DTU is a kind of cellular terminal device with RS232/RS485 that provides data transfer
function by public GPRS network
It adopts high-powered ARM9 CPU and embedded real time operating system, integrates all the commonly used
protocols, such as TCP/IP/UDP and so on, from logical link layer to upper application layer protocols. It provides a
secure, high speed, reliable wireless internet connection for customers and supports several ways that trigger DTU to be
online, including SMS and data. It also supports double or several data centers.
This product has been widely used in M2M/SCADA field,such as power automation, transportation, financial service
terminal, factory automation, water, oil&gas, large machine maintenance, environment, building automation, outdoor
digital signage ect.

3. 厦门信辰信息科技有限公司
XiamenXiamenXiamenXiamen SignShineSignShineSignShineSignShine InformationInformationInformationInformation TechnologyTechnologyTechnologyTechnology Co.,.LtdCo.,.LtdCo.,.LtdCo.,.Ltd
Address：905A, Block C2, No. 5 JinZhong Road ,Huli District, Xiamen, China 361009 Phone：0592-5538731
Website：http://www.signshine.cn./en/ Fax ：0592-5597794
Product Appearance
RS232 interface DTU
RS485 interface DTU
Block interface DTU

4. 厦门信辰信息科技有限公司
XiamenXiamenXiamenXiamen SignShineSignShineSignShineSignShine InformationInformationInformationInformation TechnologyTechnologyTechnologyTechnology Co.,.LtdCo.,.LtdCo.,.LtdCo.,.Ltd
Address：905A, Block C2, No. 5 JinZhong Road ,Huli District, Xiamen, China 361009 Phone：0592-5538731
Website：http://www.signshine.cn./en/ Fax ：0592-5597794
ProductProductProductProduct FeatureFeatureFeatureFeature
Industrial Design
※Industrial high-powered embedded 32 bits CPU
※Industrial high-powered cellular module
※Real time OS with completely full TCP/IP protocol
※Strengthened PCB which follows the principle of 20H and
3W,and adopts health benefits material to ensure the product
stability
※Industrial grade rigorous screened components
※Industrial power adapter, wide voltage power supply design,
power range DC7-32 V, reverse-voltage and overvoltage
protection
Stability and Reliability
※Three-tier system protection, based on the system protection
of software protection and WDT, It supports VWM （Virtual
Man Watch）function
※SIM/UIM port: 15KV ESD protection
※RS232/RS485/RS422 port: 15KV ESD protection
※Housing: iron, providing IP41 protection, radiation protection,
anti-interference, lightning protection design, special for outdoor
harsh environmental application
※All modules are certified by CGD/CE/FCC certificate
※Support dynamic domain name(DDNS) and IP access to data
center
※Design with standard TCP/IP protocol stack
※ EMC&EMI outstanding performance, passed 3000V electrical
shock test&EMC test
High Performance
※TCP/UDP transparent data transfer, supports several work mode
※Support APN and VPDN
※Support DDNS and IP access to data center
※Support double data centers for backup

5. 厦门信辰信息科技有限公司
XiamenXiamenXiamenXiamen SignShineSignShineSignShineSignShine InformationInformationInformationInformation TechnologyTechnologyTechnologyTechnology Co.,.LtdCo.,.LtdCo.,.LtdCo.,.Ltd
Address：905A, Block C2, No. 5 JinZhong Road ,Huli District, Xiamen, China 361009 Phone：0592-5538731
Website：http://www.signshine.cn./en/ Fax ：0592-5597794
※Support several data centers
※Support auto recovery mechanism, including online detect,
auto Re-dial when offline to make it always online
※Support multi online trigger ways, including SMS, ring and
data.
※Support link disconnection when timeout
※Adopt smart online keeping technology to make sure that
DTU is always online
※Support SMS backup and emergency report
※Support RSA and RC4 encryption arithmetic
※Standard AT command interface
※Support telnet function
※Support common MODEM function
※Lower consumption design, sleep mode <1mA,standby mode
<15mA, communication mode<35mA
※Support console upgrade firmware
※Support multi OS, such as WINDOWS, LINUX, SCO UNIX
ect
Easy to Use
※Graphical configuration tool which provides fast configuration
and bulk configuration
※Center software based on C#,VC,VB,DEPHI language
※Compatible with third party software
※Communication interface:RS232/RS485/RS422/TTL/USB/RJ45
※Network type：GSM/GPRS/CDMA/EDGE/WCDMA/EVDO/
HSPA/HSPA+/LTE
※Various of DLL based on C#,VC,VB,DEPHI language, provide
user guide
※Checkout software, Serial debugging software, network speed
detection software, provide a different level of debugging output

6. 厦门信辰信息科技有限公司
XiamenXiamenXiamenXiamen SignShineSignShineSignShineSignShine InformationInformationInformationInformation TechnologyTechnologyTechnologyTechnology Co.,.LtdCo.,.LtdCo.,.LtdCo.,.Ltd
Address：905A, Block C2, No. 5 JinZhong Road ,Huli District, Xiamen, China 361009 Phone：0592-5538731
Website：http://www.signshine.cn./en/ Fax ：0592-5597794
CellularCellularCellularCellular SpecificationSpecificationSpecificationSpecification
Item Content
Cellular Module Industrial cellular module
Standard and Band EGSM900/GSM1800MHz , GSM850/900/1800/1900MHz(optional)
Compliant to GSM phase 2/2+,
GPRS class 10, class 12(optional)
Coding scheme CS1~CS4
Bandwidth Theory：171.2Kb/s；Actual：100Kbits>X>20Kbits/s
TX power GSM850/900：<33dBm；GSM1800/1900：<30dBm
RX sensitivity <-107dBm
Function Data, SMS
Hardware
Item Content
CPU Industrial 32 bits CPU,200MPS,MMU,16KB Dcache,16KB Icache
FLASH 32Mbits（Extendable to 256Mbits）
SDRAM 1024Kbits(Extendable to 4096Kbits)

7. 厦门信辰信息科技有限公司
XiamenXiamenXiamenXiamen SignShineSignShineSignShineSignShine InformationInformationInformationInformation TechnologyTechnologyTechnologyTechnology Co.,.LtdCo.,.LtdCo.,.LtdCo.,.Ltd
Address：905A, Block C2, No. 5 JinZhong Road ,Huli District, Xiamen, China 361009 Phone：0592-5538731
Website：http://www.signshine.cn./en/ Fax ：0592-5597794
OS
Item Content
Operating System Real time OS with MMU, standard TCP/IP protocol stack
Interface
Item Content
Serial Port 1 RS232 port or 1 RS485(orRS422) port or block interface 15KV ESD protection
Data bits: 7, 8
Stop bits: 1, 2
Parity: none, even, odd, space, mark
Baud rate: 110~230400 bps
Flow control：None、RTS/CTS hardware flow control or XON/XOFF software flow control
Indicator POWER,ACT and Online
Antenna Standard SMA female interface, 50 ohm, lighting protection(optional)
SIM/UIM Standard user card interface, support 1.8V/3V/5V SIM/UIM card, 15KV ESD protection
Voice Standard Earphone and Microphone port(Need software matched)
Power Standard 3-PIN power jack, reverse-voltage and over voltage protection

8. 厦门信辰信息科技有限公司
XiamenXiamenXiamenXiamen SignShineSignShineSignShineSignShine InformationInformationInformationInformation TechnologyTechnologyTechnologyTechnology Co.,.LtdCo.,.LtdCo.,.LtdCo.,.Ltd
Address：905A, Block C2, No. 5 JinZhong Road ,Huli District, Xiamen, China 361009 Phone：0592-5538731
Website：http://www.signshine.cn./en/ Fax ：0592-5597794
Power Supply
Item Content
Power Range DC 7~32V
Standard Power DC 9V/1.5A
Communication Current Average：350mA@+9VDC;Peak：1.0A@+9VDC
Standby Current Average：<35mA@+9VDC
Physical Characteristics
Item Content
Housing iron, IP41 protection, radiation protection, anti-interference, lightning protection design
Product Dimensions 92x62x22 mm
Package Dimensions 298x226x60mm
Weight 0.41kg
Environmental Limits
Item Content
Operating Temperature -25 ºC ~+65ºC
Extended Operating Temperature -35 ºC~+75ºC
Storage Temperature -40ºC~+85ºC
Relative Humidity 95%(Non-condensing)