RJ45 - RS232

Converters fit, for example, printer

3D printing is an additive production technique developed for rapid prototyping. Its goal is to quickly and easily generate a physical piece. Different materials can be used, more generally ABS plastic, PLA plastic, and metal, but also wax, or even plaster.
The applications of 3D printing are varied, but in all cases aim to concrete visualization of projects, or verification of parts ergonomics. 3D printing ......

s and PC.

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

RJ45

RJ45

This is the network standard that allows internet connection. This type of cable has 8 electrical connection pins. It is also called ETHERNET cable or 8P8C connector (8 positions and 8 electrical contacts).
It is this standard that allows internet connection. This connector is physically compatible with the RJ11 connector if using an adapter. On 10/100 Mbps RJ45 computer wiring, only 4 1~2 and 3~6 pins are u......

to RS232

RS232

For a serial line information arrive at regular intervals (synchronous) or at random intervals (asynchronous). Between a transmitter (DTE) and a receiver (DCE) wiring is right. RS232 cables can be connected in series.
In configurations where 2 DTE are directly connected, a cable of cross linking or \Null-Modem\ should be used. This cable has female connectors at each ......

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)

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.

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)

Adapter

Example of a converter card.

www.instrumentic.info

RJ45 / RS232 - Know everything !