Pin definitions for RS-232 male Headers

Pin definitions for RS-232 male Headers

For the interface, the order is as follows:

DB9 master/pass: 54321 DB9 public/needle: 12345

9876
6789

1. RS-232 end (DB9 master/pass) PIN Definition
Pin No. 2 3 5 1, 4, 6, 7, 8
Signal definition txd rxd internal connection
Note: This port can be directly inserted into the COM port of the computer.

2. RS-232 end (DB9 head/needle) PIN Definition
Pin No. 2 3 5 1, 4, 6, 7, 8
Signal definition rxd txd internal connection
Note: This port can be connected to devices that communicate with computers.