NP301B is a serial device server which can connect with your WAN or LAN. it provides one RS-232/485/422 (RS-232: DB9M; RS-485/422: 5 bits terminal block) and 1 10/100Base-T(X) ethernet port. Supports TCP, UDP, ARP, ICM and DHCP protocol, Windows Native COM and auto-connect function if the network is intermitent.
In addition, NP301B provide the management tools to allow easy device managemet by the user via network or serial. Supports pass gateway and router, easy for user to set IP address, Server and Client mode, size of data and so on. Ideal for use where a serial device needs to be connected via an existing LAN or WAN.

Features:
1. 3-in-1 RS-232/RS-485/RS-422 serial interface
2. Support 10/100M auto-sensing Ethernet
3. Support 300bps～115.2Kbps
4. Support TCP, UDP, ARP, ICMP, HTTP and DHCP protocol
5. Support across gateway, router communication
6. Support standard TCP/IP SOCKET
7. Support Virtual serial driver access and auto connect after the network disconnect
8. Provide installation Windows configure tool
9. Choice of configuration methods: Windows, TELNET and WEB
Specifications:
Ethernet
Standard:10/100Base-T(x)
Speed:10/100M auto-sensing
Working: TCP Server, TCP Client, UDP and Real COM driver
Memory: Most 32Kbyte
Transmission: 100m
Electromagnetism isolate: 1KV
Connector: RJ45
Serial
Standard: RS-232/RS-485/RS-422
Signals: RS-232:DCD,RXD,TXD,DTR,GND,DSR,RTS,CTS
RS-485:Data+,Data-,GND
RS-422:TXD+,TXD-,RXD+,RXD-,GND
Working mode: Asynchronous format, point to point, 2 wires half duplex, 4 wires full duplex
Parity: None, Even, Odd, Space, Mark
Data bits: 7bit, 8bit
Baud rate: 300bps ~ 115.2Kbps
Flow control: RTS/CTS
Direction control: RS485 side adopt ADDC technology, auto text and control data transfer direction
Loading: RS-485/422 side support 32 nodes (customize 128 nodes) loopback
Transmission: RS-485/422 side 1200M,
RS-232 port 15M
Interface protection：1500W surge protection,
15KV ESD protection
Software
Network protocols: Support TCP, UDP, ARP, ICMP, HTTP and DHCP
Driver support: Windows Real COM driver(Windows NT/2000,WindowsXP/2003)
Configuration options: Windows, TELNET and WEB
Power
Power input: 12~36VDC
Consumption: <1W
Environment
Working temperature:-20°C～60°C
Storage temperature:-25°C～85°C
Humidity: Relative humidity 5% to 95%
Appearance
Color: Black
L×W×H: 100mm×69mm×22mm
Material: Iron (Shell)
Weight: 240g
Approvals: FCC, CE, RoHS approvals