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1-port RS 232/485/422 Serial to Ethernet Gateway


Availability: In stock



NP311 is a serial device server which can connect with network fast. It provides one RS-232/485/422 (RS-232: dB9M; RS-484/422: 4 bits terminal block) and 1 10Base-T Ethernet port, it can manage the disperse serial device or host computer by network, easily and convenience. Setting or software upgrade by serial program group in apply, support TCP, UDP, ARP, ICM and DHCP protocol, support Windows Native COM and auto-connect function once the network intermit.
In addition, NP311 provide the management collocate tools that based Windows flat roof. It can lead the user manage and configure facility step by step, all of the setting can be done by network or serial. Support pass gateway and router, easily for user to set IP address, Server and Client mode, size of data and so on, Can realize the serial device connect with network by simply setting.
Its outside design support DIN-Rail and Wall mounting, apply to project easily.


Standard: 10Base-T
Speed: 10M
Working: TCP Server, TCP Client, UDP and Real COM driver
Memory: Most 32Kbyte
Transmission: 100m
Electromagnetism isolate: 1KV
Connector: RJ45


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)


Transmission: RS-485/422 side 1200M,
RS-232 port 15M
Interface protection: 1500W surge protection,
15KV ESD protection


Network protocols: Support TCP, UDP, ARP, ICMP and DHCP

Driver support: Windows Real COM driver
(WindowsNT/2000, WindowsXP/2003)
Configuration options: SOCKET, Windows


Power input: 9VDC
Consumption: <1W


Working temperature: -20~60º C
Storage temperature: -25~85º C
Humidity: Relative humidity 5% to 95%


Color: Black
L*W*H: 100mm*69mm*22mm
Material: Iron (Shell)
Weight: 240g

Warranty: 1 year

Approvals: FCC, CE, RoHS approvals

Packing List

  1. NP311 (plus terminal
  2. User manual
  3. Straight network cable
  4. 9VDC power adapter
  5. Software CD-ROM
  6. Product Warranty booklet

Optional accessories:
DIN-Rail Mounting Kit (35mm)

Additional Information

Manufacturer No
Length N/A
Color N/A
OS Support N/A

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