Usr USR-N668 User Manual
USR-N668 User Manual Technical Support: h.usriot.com
USR-N668 User Manual
File Version: V1.0.4
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USR-N668 User Manual Technical Support: h.usriot.com
Contents
USR-N668 User Manual ........................................................................................................................................... 1
Features ...................................................................................................................................................................... 4
1. Get Start ............................................................................................................................................................. 5
1.1.Hardware Test ............................................................................................................................................... 5
1.2.NTE Network Test Environment .................................................................................................................... 7
1.3. Default parameter test ................................................................................................................................ 7
2. Product overview ................................................................................................................................................ 9
2.1. Basic parameters ....................................................................................................................................... 10
3. Hardware Design .............................................................................................................................................. 11
3.1. Hardware Dimensions ........................................................................................................................ 11
3.2. Pin definition ..................................................................................................................................... 11
3.2.2. Pin definition .................................................................................................................................. 14
3.2.3. LED Indicator ................................................................................................................................... 14
4. Product Functions ............................................................................................................................................. 15
4.1. Basic Functions .......................................................................................................................................... 15
4.1.1. IP address / Subnet mask / Gateway ............................................................................................... 15
4.1.2. DNS ................................................................................................................................................. 17
4.1.3. VPN-PPTP ........................................................................................................................................ 17
4.1.4. VPN-GRE ......................................................................................................................................... 18
4.1.5. Network diagnosis .......................................................................................................................... 19
4.1.6. Restore factory settings .................................................................................................................. 20
4.1.7. Web Server ..................................................................................................................................... 20
4.1.8. Firmware upgrade........................................................................................................................... 21
4.2. Transtransmission function ........................................................................................................................ 22
4.2.1. TCP Client ........................................................................................................................................ 22
4.2.2. TCP Server ....................................................................................................................................... 24
4.2.3. UDP Client ....................................................................................................................................... 26
4.2.4. UDP Server ...................................................................................................................................... 28
4.2.5. Httpd Client..................................................................................................................................... 29
4.2.6. SSL Client ........................................................................................................................................ 31
4.2.7. V-COM ............................................................................................................................................ 32
4.3. Serial port Functions .................................................................................................................................. 33
4.3.1. Serial port framing mechanism ....................................................................................................... 33
4.3.2. RFC2217-like ................................................................................................................................... 33
4.4. Characteristic function ............................................................................................................................... 34
4.4.1. Socket B .......................................................................................................................................... 34
4.4.2. Heartbeat Packet Function ............................................................................................................. 35
4.4.3. Registration package ....................................................................................................................... 36
4.4.4. Modbus TCP .................................................................................................................................... 37
4.4.5. No data reconnection ..................................................................................................................... 38
4.4.6. DDNS ............................................................................................................................................... 39
4.4.7. Remote management and remote monitoring ............................................................................... 39
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4.4.8. Scheduled task ................................................................................................................................ 40
5.Parameter setting .................................................................................................................................................. 41
5.1. Network protocol settings parameters ...................................................................................................... 41
5.1.1. Software setting parameters ........................................................................................................... 41
5.1.2. Setting protocol settings parameters .............................................................................................. 43
5.2. Web settings parameters ........................................................................................................................... 43
5.3. AT command .............................................................................................................................................. 46
5.3.1. AT command ................................................................................................................................... 46
5.3.2. Error code ....................................................................................................................................... 47
6.Contact Us ............................................................................................................................................................. 48
7.Disclaimer .............................................................................................................................................................. 48
8.Update History ....................................................................................................................................................... 48
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Features
Two 10/100Mbps Ethernet port, support Auto-MDI/MDIX.
8 serial ports all support RS232/RS485/RS422.
Support Static IP or DHCP.
TCP Server, TCP Client, UDP Client, UDP Server, HTTPD Client .
8 serial ports all support two sockets ,and all can send data to two different servers when work as Client.
It works as TCP client, supports to 16(max) TCP Client.
Keep-alive & Registration-package.
Modbus TCP to Modbus RTU.
User-defined overtime Reload (no data reload)and overtime connection.
The modifiable , one and only MAC.
DNS domain name resolution ,user-defined DNS server address.
Remote monitoring and remote firmware upgrading.
Network time synchronization +RTC real time clock.
User-defined Task Scheduler.
Supports web server configuration.
Supports V-COM.
Reload by hardware and software.
Run across gateways, switches and routers.
Work in LAN or external network.
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1. Get Start
Product link:
http://usriot.com/products/8-ports-serial-to-ethernet-converter.html
Figure 1 Download Page
If you have any question, please submit it back to customer center: http://h.usriot.com
1.1.Hardware Test
1.1.1. Hardware Preparation
You need:
1. USR-N668 for one;
2. Power cord (85V~265V)for one;
3. Female to female serial cable for one;
4. DB9-M to RJ45 for one;
5. Network line for two;
6. PC(with RS232,or USB to 232)
1.1.2. Hardware Connection
For test the communication conversion between serial port and network , you should connect the
USR-N668 to PC with serial cable(or USB to serial cable),connect the Ethernet port of USR-N668 and PC
with network. Make sure the connection is correct , then power on.
ALL the connecting lines form USR IOT;
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The test only for RS232, factory default setting for RS232;
Check the dial up settings window ,make sure USR-N668 work at correct pattern.(See the details in
Hardware introduce->Dial up)
Figure 1. RS232/485/422 smart switch
N668 serial port 1->network->DB9-M to RJ45->mother to mother serial cable->PC serial port
Figure 2. serial port connection between N668 and PC
The above is the hardware connection diagram of RS232 for transparent transmission. when use
RS485/RS422,you can connect the corresponding signal line.(see the details in Hardware introduce->
Serial port pin definition )
Note: the standard configuration of DB9-M to RJ 45 is only one, if you need more, you need separate
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purchase
The overall hardware connection and data flow are as follows,
Figure 3. data flow
1.2.NTE Network Test Environment
Before the network test, you should:
1) Close the firewall of the computer (usually found in the control panel)and anti-virus software;
2) Close the network card which is not related to this test, only one local connection is reserved;
3) For servers to connect directly to PC, a static IP (address in the same network segment with USR-N668) must be
set to the PC (e.g.192.168.0.201).
Figure 4. PC local connection settings
1.3. Default parameter test
Table 1 default parameters
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Item
Content
User name
admin
Password
admin
IP address
192.168.0.7
Subnet mask
255.255.255.0
Default gateway
192.168.0.1
Default mode of operation
TCP Server
Default target port
20001~20008
Default local port
20001~20008
Default target IP
192.168.0.201
Serial baud rate
115200
Serial port parameters
None/8/1
After confirmation, You can carry out the bidirectional between the serial port and the Ethernet port.
Communication procedures are as follows:
1) Open the testing software”USR-TCP232-Test.exe”，connected hardware;
2) The default mode of operation is TCP Server, first port serial port monitor 20001 port. So choose TCP client mode at
the network setup end of the software,IP:192.168.0.7,target port 20001,then click the connect. The serial baud
rate is 115200, The serial port parameter is set to None/8/1,chick open.
3) Send data for test, the data flow form serial port to Net is: PC serial port->668 serial port->668 Ethernet port->PC
network; the data flow form Net to serial port is: PC network->668 Ethernet port->668 serial port->PC serial port.
The specific demo is shown below.
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Figure 5. data transmission test
The USR-TCP232-Test.exe download links:
https://www.usriot.com/support/downloads/usr-tcp-test-testing-software.html
2. Product overview
Figure 6. USR-N668 hardware interface
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classification
parameter
numerical
Hardware parameters
Working voltage
AC 85~265V, 50/60Hz
Power Consumption
1.6W
Ethernet Port
RJ45、10/100Mbps
Number of Ethernet port
2
Serial port format
RJ45
Number of serial port
8*RS232/RS485/RS422
Serial baud rate
300-115.2K(bps)
Software parameters
Network protocol
IP、TCP/UDP、ARP、ICMP、IPV4、HTTP、SSL
IP
Static IP、DHCP
Domain name resolution
Support, customize DNS server address
User configuration
Software configuration,
Web page configuration,
AT instruction configuration
Simple pass through mode
TCP Server/TCP Client/SSL Client
UDP Server/UDP Client/Http Client
Class RFC2217
Support
Network cache
10kbyte
Serial port cache
10kbyte
Average transmission delay
>=50ms
Software kit
V-COM,setup software,test program
Packaging mechanism
50ms packing time,
1472 bytes packing length
Certificate
CE/RoHs
Other
Reliability grade
EN61000-4-2(static electricity) Grade 4
EN61000-4-4(pulse group) Grade 4
EN61000-4-5(surge) Grade 3
Shell protection
IP30
Full-size
482*185*45 MM
Work temperature
40～85℃
Storage temperature
40～85℃
Work humidity
5%~95%(Non condensation)
Storage humidity
5%~95%(Non condensation)
2.1. Basic parameters
2.2.
Table 2 Electrical parameters
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3. Hardware Design
3.1. Hardware Dimensions
Figure 7 Hardware dimensions
3.2. Pin definition
3.2.1. Dial switch
On the back of the equipment, there is a dial up switch setting window.
You need to use the cross flower screwdriver, remove the screws to see.
The following is the setting of the code switch.
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Figure 8. RS232/485/422 smart switch
A total of 16 (8 serial port * 2) dial code. The device has 8 serial ports and 2 dial numbers per route, as shown in the
figure.
Figure 9. RS232 model
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communication mode
Dial switch(L to R)
232
0 0
485
1 1
422
1 0
Figure 10. RS485 model
Figure 11. RS422 model
Table 3 Correspondence
Pay attention:
The switch position is shown in the figure.
The dialing sequence form L to R.
Default is 232 mode,the dial switch is “0 0”.
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Pin Number
Name
Function
1
232_TX/422_Z/485_B1
232 send;422 signal Z;485 signal B
2
232_RX/422_A1
232 receive;422 signal A
3
422_Y/485_A1
422 signal Y;485 signal A
4
422_B1
422 signal B
5
NC 6
GND
232 signal GND
7
NC 8
NC
3.2.2. Pin definition
The serial port pin diagram is as follows (The hardware interface is RJ45).
Figure 12. Serial line sequence
Table 4 Serial line sequence
Pay attention:
232,485,422 can’t work at one time;
The position of the dialing switch must be correct.
The hardware interface is RJ45, you need to use 8 core cable and crystal head to make communication cables.
3.2.3. LED Indicator
Figure 13. LED location
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Indicator
Function
PWR
Red/On: Power on
WORK
Green/ Flicker: Working
STATE
Red/ Undefined
READY
Green/On: working
TXN
Red/Flicker: Serial port sending data
RXN
Green/Flicker: Serial port receiving data
LED status reference table.
Table 5 LED indicator
4. Product Functions
This chapter introduces the functions of USR-N668 as the following diagram shown, you can get an overall knowledge
of it.
Figure 14 Product 668 Functions diagram
4.1. Basic Functions
4.1.1. IP address / Subnet mask / Gateway
There are two ways for module to get IP address: Static IP and DHCP.
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