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This is quality DB9 Male Connector that with solder tail package. DB9 connector is widely used for serial communication RS232, RS485 and RS422 interface.
RS232 DB9 Pinout Diagram
RS-232 Maximum Cable Length
The maximum cable length for RS-232 is 50ft, but in practise depends on baud rate, cable specific capacitance and ambient noise. The table below contains some rules-of-thumb from experiments done by Texas Instruments years ago.
|Baud rate||Maximum range / cable length|
The DB9 Female Connector For RS232/RS422/RS485 is also available.