PRODUCTS > Serial Device Servers > NCOM-112


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NCOM-112 - 1-Port Serial Device Server


  • Adds a virtual serial COM port via network connection

  • Fully supports “COM Port Control” protocol known as RFC2217

  • Supports network protocols such as TCP or UDP Client/Server

  • Firmware upgradable for future firmware revisions

  • Supports virtual serial port driver for Windows OS (Windows XP up to Windows 10)

  • 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

  • 10/100 Mbps Ethernet with auto-detection

  • Configuration via web console interface or utility software

  • Windows utility software automatically finds NCOM devices on the network

  • Data rates: 300bps to 921.6Kbps

  • Auto transmit buffer control for 2-wire RS-485 half-duplex operation

  • Termination resistors installed on-board

  • Supports RS-422, RS-485 4-wire signals: TxD-, TxD+, RxD+, RxD-

  • Supports RS-485 2-wire signals: data-, data+

  • LEDs indicating Ethernet port’s link and speed statuses

  • LEDs indicating serial port’s TxD and RxD statuses

  • Virtual serial port drivers for Windows 10, 8.1, 8, 7, Vista, XP, Server 2003

  • Built-in 15kV ESD protection for all serial signals

Ethernet 10/100Mbps
Connector RJ-45 connector
Protection Built-in 1.5kV magnetic isolation
Serial Interface
Interface RS-422/485
Number of Ports One
Connector DB9 male connector
Max. Speed 921.6kbps for serial data transmit & receive
RS-422 Signals TxD-, TxD+, RxD+, RxD-, GND
RS-485 Signals 4-wire TxD-, TxD+, RxD+, RxD-, GND
2-wire Data-, Data+, GND
Protection 15kV ESD for all signals
RS-485 Data Direction Automatic RS-485 direction control
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 Requirement
Power Input 9VDC to 48VDC
Power Consumption 95mA@12VDC, 38mA@48VDC
Operating Temperature 0°C to 55°C (32°F to 131°F)
Storage Temperature -20°C to 75°C (-4°F to 167°F)
Humidity 5% to 95% RH
Safety Approvals CE, FCC
Casing Plastic
Dimensions 106 mm x 97 mm x 32 mm (L x W x H)
Weight 110g

RS-422 & RS-485 DB9 Male Connector Pin-outs

RS-422/485 Full Duplex Pin-out for DB9 Connector

  Pin Number Pin Type Description  
  1 Output TxD- Transmit Data, negative polarity  
  2 Output TxD+ Transmit Data, positive polarity  
  3 Input RxD+ Receive Data, positive polarity  
  4 Input RxD- Receive Data, negative polarity  
  5 Ground GND Signal Ground  

RS-485 Half Duplex Pin-out for DB9 Connector

  Pin Number Pin Type Description  
  1 Output/Input Data- Transmit/Receive Data, negative polarity  
  2 Output/Input Data+ Transmit/Receive Data, positive polarity  
  5 Ground GND Signal Ground