Null Modem Cables
- Compact null modem serial connection
- Provides "cross-over" connection for serial devices
- DB9 Female connector on each end
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See Also: DB9 Connectors, DB9 Extension Cables, DB9 Breakout Boards, DB9 Breadboard Adapters
These Null Modem cables can be used to connect two serial ports together, allowing communication between them. The Transmit signal of one side is connected to the Receive signal of the other. Flow control lines and other signals are also connected. Applications include PC serial communications and other devices.
The exact connections are as follows:
|Signal||DB9 Pin||DB9 Pin||Signal|
|DTR (Data Terminal Ready)||4||6, 1||DSR (Data Set Ready), Carrier Detect|
|DSR (Data Set Ready), Carrier Detect||6, 1||4||DTR (Data Terminal Ready)|
|RTS (Request to Send)||7||8||CTS (Clear to Send)|
|CTS (Clear to Send)||8||7||RTS (Request to Send)|
Pricing and Ordering
|Null Modem Cable, DB9 Female to DB9 Female, 6 Ft||$3.99||$3.75||Yes|
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.