Mini Null Modem Adapters


MGCNM9FF (Female to Female)
(click image to enlarge)
  • Compact null modem serial connection
  • Provides "cross-over" connection for serial devices>
  • Available in Female-Female, Male-Female and Male-Male

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See Also: Null Modem Cables,   DB9 Extension Cables,   DB9 Breakout Boards,   DB9 Breadboard Adapters


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. The same functionality is available in null modem cables as well.

Product Documents

Part #DescriptionPDF Drawing
MGCNM9FFNull Modem Adapter, DB9 Female-Female
MGCNM9FF
Null Modem Adapter, DB9 Female-Female

For each of these null modem adapters, 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)

Note: Pin 9 is not connected on either side.

Pricing and Ordering

Product # Description 1+ 10+ 50+ 100+ RoHS Buy Now
MGCNM9FF Mini Null Modem Adapter, DB9 Female - DB9 Female $2.75 $2.49 $2.25 $1.90 Yes
MGCNM9MF Mini Null Modem Adapter, DB9 Male - DB9 Female $2.75 $2.49 $2.25 $1.90 Yes
MGCNM9MM Mini Null Modem Adapter, DB9 Male - DB9 Male $2.75 $2.49 $2.25 $1.90 Yes
MGCNM9FF
Mini Null Modem Adapter, DB9 Female - DB9 Female
RoHS: Yes
Buy Now:
QuantityPrice
1+$2.75
10+$2.49
50+$2.25
100+$1.90
MGCNM9MF
Mini Null Modem Adapter, DB9 Male - DB9 Female
RoHS: Yes
Buy Now:
QuantityPrice
1+$2.75
10+$2.49
50+$2.25
100+$1.90
MGCNM9MM
Mini Null Modem Adapter, DB9 Male - DB9 Male
RoHS: Yes
Buy Now:
QuantityPrice
1+$2.75
10+$2.49
50+$2.25
100+$1.90

All of the above items are normally stocked. Please call us if you need to verify availability for a specific quantity, or for pricing at higher quantities. Please visit our ordering page for our ordering policies and a list of ordering methods.