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B+B SmartWorx RS232 Null Modem Adapter, DB9 Male-Male

  • Advantech
  • 33748138
  • MMNM9
  • Partial Quantity Available
  • Call for next available delivery
Ordering Information
Null modem adapters are used to connect two DTEs (computer, terminal, printer etc.) directly using a RS-232 serial cable. The original RS-232 standard only defined the connection of DTEs with DCEs (i.e. modems). With a null modem adapter, the transmit and receive lines are cross-linked. Depending on the purpose, one or more handshake lines are cross-linked. Several wiring layouts are in use because the null modem connection is not covered by a standard.