The COM1 serial port uses an RJ45 connector which has the following pinout:
|
Pin # |
Signal RS-232 |
Signal RS-422 |
|---|---|---|
|
1 |
Not connected |
Not connected |
|
2 |
Not connected |
Received Data - |
|
3 |
Not connected |
Transmitted Data + |
|
4 |
Signal Ground |
Signal Ground |
|
5 |
Received Data |
Received Data + |
|
6 |
Transmitted Data |
Transmitted Data - |
|
7 |
Not connected |
Not connected |
|
8 |
Not connected |
Not connected |
Note
The COM1 Port is DTE (Data Terminal Equipment) which defines the direction of the signals (IN/OUT).