PRODUCTS > Serial Device Servers > NCOM-211-M


 Products Manual


NCOM-211-M - 2-Port Serial to Ethernet Serial Device Server with Metal Case (RS-232)


  • Adds two virtual serial COM ports via network connection
  • Supports virtual serial port driver for Windows
  • Supports pair connection mode for connecting two serial device servers over a network without a PC
  • Easy-to-use Windows utility software for easy configuration and installation
  • Serial port operation mode can be easily changed via Windows utility software or web console interface
  • 10/100Mbps Ethernet with auto-detection
  • Configuration via web console interface or utility software
  • Windows utility software automatically finds NCOM devices on the network
  • Firmware upgradable for future firmware revisions
  • LEDs indicating Ethernet port’s link and speed statuses
  • LEDs indicating serial port’s TxD and RxD statuses
  • LEDs indicating serial port operation mode
  • Supports “reset” button for system reset and restoring to default settings
  • Data rates: 300bps to 921.6kbps
  • Built-in 15kV ESD protection for all serial signals
  • Fully supports “COM Port Control” protocol known as RFC2217
  • Supports network protocols such as TCP or UDP Client/Server
  • Supported RS-232 signals: DCD, RxD, TxD, DTR, GND, DSR, RTS, CTS
  • Termination resistors installed on-board
  • Supports Windows XP up to Windows 10, Windows Server 2003 up to Windows Server 2016


Ethernet 10/100Mbps
Connector RJ-45 connector
Protection Built-in 1.5kV magnetic isolation
Serial Interface
Interface RS-232
Number of Ports 2
Connector DB9 male
Max. Speed 921.6kbps for transmit & receive
RS-232 Signals DCD, RxD, TxD, DTR, GND, DSR, RTS, CTS
Protection 15kV for all signals
Serial Communication Parameters
Data Bits 5, 6, 7, 8
Parity None, odd, even, mark, space
Stop Bit 1, 1.5, 2
Flow Control Hardware (RTS, CTS)
Software Features
Utility NCOM management tool for Windows OS
OS Driver Support Virtual serial port driver for Windows OS
Configuration Web console, Windows utility
Power Input 9VDC to 48VDC
Power Consumption 140mA@12VDC, 55mA@48VDC
Operating Temperature 0 to 55°C (32 to 131°F)
Storage Temperature -20 to 75°C (-4 to 167°F)
Operating Humidity 5% to 95% RH
Safety Approvals CE, FCC
Casing SECC sheet metal
Dimensions 95mm × 71mm × 22mm (L × W × H)
100mm × 91mm × 22mm with DB-9 connector and ears(L × W × H)
Weight 220g