$105.00 - $130.00
Min. Order : 1 Set

ZLAN8303N-7 3G 4G DTU serial port RS232 RS485 to 3G/ 4G converter GSM sim card modem Router Modbus Gateway P2P

Get Latest Price
Trade Assurance
Built-in order protection service in alibaba.com
Product quality
On-time shipment
More on shipping and other trade services.

Quick Details

Port: Shanghai
Payment Terms: L/C,T/T,Western Union
Supply Ability: 3000 Set/Sets per Week
Warranty: 3 Years
Place of Origin: Shanghai China
Serial Port: RS232 RS485
Transmission Rate: 1024Kbps
Model Number: ZLAN8303N-7
Certification: CE
Power Supply: DC 9~24V
Brand Name: ZLAN
Function: Serial to 3G/4G, Modbus RTU to 3G/4G Modbus TCP, P2P
Type: Wireless
Product name: RS232/RS485 Modbus P2P 3G/4G Converter
Support Network: Unicom 4G/3G/2G, Mobile 4G/3G/2G, Telecom 2G/3G/4G
Products Status: Stock
Style: External
Interface Type: RS-232
Packaging Detail: 32.7*16*6 cm
Shanghai ZLAN Information Technology Co., Ltd.
Gold Supplier
Manufacturer, Trading Company
Response Time
On-time delivery rate
US$ 10,000+
Visit Store

ZLAN8303N-7 3G 4G DTU serial port RS232 RS485 to 3G/4G converter GSM Router Modbus Gateway P2P


Product Description

The 3G/4G products ZLAN8303/8303-5 are the new generation mobile communication DTU, the transmission speed is faster than ZLAN8100. ZLAN8303 support Telecome, ZLAN8303-5 support Mobile and Telecom. As having Ethernet port, can be used as industrial 3G/4G router.

The normal 2G/3G/4G DTU usually need to build server then send data to the server, when there is no server as the DTU IP will change every time, active accessing DTU is very difficult. ZLAN8303N integrates the function of P2P, users’ laptop can communicate with 8303N at anytime anywhere under the P2P technology, it’s the new generation of mobile IOT data collecting scheme.



-PLC remote monitor

-Industrial remote control/sensing/measurement

-Public Utilities

-Meteorological Data Acquisition

-Three-Proofing & Hydrology Monitor

-Finance, GPRS, etc.

  • Normal 3G/4G DTUThe normal 3G/4G DTU can be as TCP Server connected by other network devices, since the 8303 IP is not fixed when under 3G/4G mode, usually it isn’t as TCP Server, but mostly as TCP Client to connect an fixed IP (or domain name) Server, and send its collecting data. The software on Server ask data through polling style. The RS485/232 of 8303 can connect with serial device and PLC needed collected, sending polling command to PLC, and upload the returned data to server.11-1.jpg
  • Multi-host and Modbus Gateway
  • P2P 3G/4G Serial Device Server

No need "Port Mapping" and "Dynamic Domain Name"



1)       Easy to use, users only need to add the serial number of 8303 so can go to operate, no need any professional operation such as port mapping.

2)       No additional cost, users no need to lease public server.

3)       Support virtual serial port, no need to modify client PLC software, like local serial communication.

4)       As no need to transfer through server, but direct P2P communication, shorten data communication time, improve the real-time communication, reduce the load of central server.

5)       Support communication type of encryption and user name authentication to ensure the security of communication.




1)       The supporting 3G/4G network

a)       8303/8343/8303N/8343N: support EVDO/CDMA2000, Telecom 3G network

b)       8303-7/8343-7/8303N-7/8343N-7: support 5 modes, TD-LTE/ FDD-LTE/ WCDMA/ TD-SCDMA/ EVDO/CDMA2000/GSM, Unicom 4G/3G/2G, Mobile 4G/3G/2G and Telecom 2G/3G/4G network

2)       Provide an Ethernet port, can be used as 3G router. Can be used as Ethernet DTU to save traffic when on the cable network, same as serial port server.

3)       Support P2P connection, no need fixed IP and server, convenient to communicate and connect.

4)       Support Modbus gateway, as Modbus TCP converting to Modbus RTU.

5)       Support multiple hosts monitoring, no interference between each other.

6)       SIM card installation in drawer type without disassembly.

7)       8303 can be controlled in dormancy via serial port to operate in low power.

Technical Parameters


Support Model8303/8343/8303N/8343N:SYS EVDO/CDMA2000, Telecom 3G/2G network
8303-7/8343-7/8303N-7/8343N-7:Support 5 modes, TD-LTE/ FDD-LTE/ WCDMA/ TD-SCDMA/ GSM, Unicom 4G/3G/2G, Mobile 4G/3G/2G and Telecom 2G/3G/4G network 
Transmission Rate3G network speed: uplink 5.76Mbps dowload 7.2Mbps 
4G network speed: uplink 2Mbps dowload68Mbps.
SIM CardVoltage: 3V,1.8V; Size: Big Card(Small card can buy card sets)
Antenna InterfaceOptional 50Ω/SMA glue stick antenna or sucker antenna
Serial Port TypeRS-232/RS-485
Serial Port ParameterBaud Rate: 1200~115200bps; Data bit: 5~9; Stop bit:1~2; Flow Control: Hardware, Software; Check bit: None, Odd, Even, Mark, Space
Power SupplyQ2.1 outlet, can be customized to power terminal input
Input VoltageDC9V~24V
Working Current< 200mA@9V
Operating Temperature-40~85℃
Running temperature: -40~90℃
Storage temp: 0~95%  Non - Condensing


Contact Info.