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MGCNM9MM


Mini Null Modem Adapter, DB9 Male - DB9 Male

MGCNM9MM - Mini Null Modem Adapter, DB9 Male - DB9 Male
Part No. Description Price Stock
MGCNM9MM Mini Null Modem Adapter, DB9 Male - DB9 Male $3 25

General Description

Use these handy adaptors to join serial devices together. These 'cross over' the transmit, receive, and control lines to allow the RS-232 ports of two PCs to communicate with each other. They can be used in other similar scenarios as well. The compact size of these adapters makes them ideal for tight spaces. These are available as Female-Female, Male-Female, and Male-Male adapters. In all cases, the pin mapping is as follows:

SignalDB9 PinDB9 PinSignal
Receive23Transmit
Transmit32Receive
DTR (Data Terminal Ready)46, 1DSR (Data Set Ready), Carrier Detect
Ground55Ground
DSR (Data Set Ready), Carrier Detect6, 14DTR (Data Terminal Ready)
RTS (Request to Send)78CTS (Clear to Send)
CTS (Clear to Send)87RTS (Request to Send)

Pin 9 is not connected on either side.