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| System Information | |
| Processor | Cortex-M4 |
| Basic Frequency | 120MHz |
| Flash | 512K byte |
| Ethernet | |
| Port Number | 1 |
| Interface Standard | 8 pin RJ45 |
| Rate | 10/100 Mbps, MDI/MDIX, auto switch between cross and direct connection |
| Protection | 2KV electromagnetism isolation, shell insulation blocking |
| Network Protocol | IP,TCP,UDP,DHCP,DNS,HTTP,ARP,ICMP,Web socket,Httpd client |
| Receive Buffer | Max 16k bytes buffer |
| Serial | |
| Port Number | 4 (Each port can work as RS-232,RS-485 and RS-422, can work at the same time) |
| Interface Standard | RS-232: DB9 pin type, RS-485: 2 wire (A+,B-), RS-422 (A,B,Y,Z) |
| Data Bits | 5,6,7,8 |
| Stop Bit | 1,2 |
| Check Bit | None,Even,Odd,Space,Mark |
| Baud Rate | 600bps ~ 230.4Kbps |
| Flow Control | RTS/CTS |
| Buffer | Send and receive 2k bytes respectively |
| Protection | RS-485: anti-static 2KV,lightning protection |
| RS-485 Pull-up and Pull-Down Resistor | 2.2 KΩ |
| Software | |
| Virtual Serial(USR-VCOM) | Windows 2000 or higher(32 bit/64 bit) |
| Configuration | Built-in webpage, computer set-up software, serial command |
| Basic Parameter | |
| Size | 222 x 122 x 29 mm (including shell and terminals) |
| Operating Temp. | -40 ~ 85°C (industry) |
| Storage Temp. | -40 ~ 85°C, 5 ~ 95% RH (no condensation) |
| Input Voltage | DC 9 ~ 24V |
| Working Current | 53mA @ 12V |
| Power | <1W |
| More | |
| Certificate | CE,FCC,ROHS |
| Warranty | 2 years |
![[USR-N540] Industrial Four Serial port RS232/RS485/RS422 to Ethernet TCP Converter with Modbus function](https://www.cdnev.com/myres/images/blank.png)
![[USR-N540] Industrial Four Serial port RS232/RS485/RS422 to Ethernet TCP Converter with Modbus function](https://www.cdnev.com/myres/images/blank.png)
![[USR-N540] Industrial Four Serial port RS232/RS485/RS422 to Ethernet TCP Converter with Modbus function](https://www.cdnev.com/myres/images/blank.png)
![[USR-N540] Industrial Four Serial port RS232/RS485/RS422 to Ethernet TCP Converter with Modbus function](https://www.cdnev.com/myres/images/blank.png)
![[USR-N540] Industrial Four Serial port RS232/RS485/RS422 to Ethernet TCP Converter with Modbus function](https://www.cdnev.com/myres/images/blank.png)
![[USR-N540] Industrial Four Serial port RS232/RS485/RS422 to Ethernet TCP Converter with Modbus function](https://www.cdnev.com/myres/images/blank.png)
![[USR-N540] Industrial Four Serial port RS232/RS485/RS422 to Ethernet TCP Converter with Modbus function](https://www.cdnev.com/myres/images/blank.png)
![[USR-N540] Industrial Four Serial port RS232/RS485/RS422 to Ethernet TCP Converter with Modbus function](https://www.cdnev.com/myres/images/blank.png)