RJ45-RS232  

      RJ11-RJ45

      USB-RJ45










RJ45 converter to rs232 cable
RJ45 converter to rs232 cable

RJ45 - RS232


Converters fit, for example, printers and PC.

Cables adapters are usually powered by the external 5V and convert RS232 RJ45 signals.
The tables below give the wiring :

RJ45 to RS232 schemas :








Basic wiring







RJ45 ----------------------------- DB25
4 (TXD) ----------------------------- 3 (RXD)
5 (RXD) ----------------------------- 2 (TXD)
6 (GND) ----------------------------- 7 (GND)






Wiring for printer







RJ45 ---------------- DB25
4 (TXD) ---------------- 3 (RXD)
5 (RXD) ---------------- 2 (TXD)
6 (GND) ---------------- 7 (GND)
7 (CTS) ---------------- 20 (DTR)




conversion to type DB9 rs232 RJ45
conversion to type DB9 rs232 RJ45

Namely :


The most common protocols are supported by the converters, including TCP - IP for Windows.


The port must be set to optimize the speed of communication, otherwise it can be slow.










conversion to type DB25 rs232 RJ45
conversion to type DB25 rs232 RJ45

Adapters


These adapters are cheap. We find them for sale on many web sites.










Wiring DB25 for pc







RJ45 ----------------------------- PC DB25
3 (DSR) ----------------------------- 20 (DTR)
2 (RTS) ----------------------------- 5 (CTS)
4 (TXD) ----------------------------- 3 (RXD)
5 (RXD) ----------------------------- 2 (TXD)
6 (GND) ----------------------------- 7 (GND)
7 (CTS) ----------------------------- 4 (RTS)
8 (DTR) ----------------------------- 6 (DSR)






Wiring DB9 for pc







RJ45 ----------------------------- PC DB9
3 (DSR) ----------------------------- 4 (DTR)
2 (RTS) ------------------------------ 8 (CTS)
4 (TXD) ------------------------------ 2 (RXD)
5 (RXD) ------------------------------ 3 (TXD)
6 (GND) ------------------------------- 5 (GND)
7 (CTS) ------------------------------ 7 (RTS)
8 (DTR) ------------------------------- 6 (DSR)




wiring RJ45 to rs232, view a map
wiring RJ45 to rs232, view a map

Adapter


Example of a converter card.