Can the network cable be directly soldered to the PCB without a crystal plug or can the network cable be plugged into the circuit board with terminals?

yshmily

The requirements are as follows: The actual fixed PCB space is limited (PCB is fixed inside the device), and the network cable needs to be led out to the outside. At present, I don’t want to put an RJ45 socket on the PCB because the network cable with a crystal plug takes up too much space. So I want to use a connector or terminal to replace the RJ45 socket (connect the network cable to the circuit board after plugging it in), or directly solder the network cable to the PCB. I would like to ask if you have experience in this regard and whether it is feasible? Or do you have any good suggestions and solutions to learn from? Thank you!

qwqwqw2088

It is definitely possible to solder the network cable connector directly to the PCB board, but it is not convenient for product debugging and maintenance.

btty038

It can be used, but are there any requirements for the wiring? If you just run it randomly, it will probably affect the speed.

btty038

J can use differential lines or dividers or something, it is recommended

littleshrimp

I think it's OK. It should be OK if it's not within 100M. But don't use the kind of single-strand hard wire, which is easy to break.

wudianjun2001

Yes, but it may affect the speed. I have seen it connected to the network cable with a 2.54 socket before.

arm8686

You can use the FPC flexible cable to connect to the RJ45 adapter installed on the chassis. You need to make a small adapter board and use a straight-plug RJ45 socket. With this small adapter board, it is also convenient to fix the network port to the chassis. On the PCB motherboard, I think the cable should be added behind the network transformer, not in front of it. In this way, there is no need for a built-in transformer in the RJ45 socket. The FPC flexible cable can use 1.0mm spacing and 15cm length, which will not affect the performance.

qwqwqw2088

Solder randomly on the PCB board but the span cannot be too large. The network cable segment must be twisted inside. The purpose of twisting is to make the noise generated by external interference on the two wires basically the same.

曹伟1993

It is definitely usable, but it is definitely very inconvenient. One is that it is not easy to fix, and the welding wire may not be firm, and the wire is too messy.

yshmily

qwqwqw2088 posted on 2019-1-16 20:09 It can definitely be used by directly soldering the network cable connector part on the PCB board, but it is not convenient for product debugging and maintenance

Thank you

yshmily

littleshrimp posted on 2019-1-16 20:46 I think it is OK. It should be OK as long as it is not under 100M. But don't use the kind of single-strand hard wire, which is easy to break

Thank you

yshmily

wudianjun2001 posted on 2019-1-17 08:23 Yes, but it may affect the speed. I have seen a 2.54 socket connected to the network cable before

Thank you

yshmily

arm8686 posted on 2019-1-17 08:40 You can use the FPC soft cable to connect to the RJ45 adapter installed on the chassis. You need to make a small adapter board and use the straight-plug RJ45 ...

Thank you!

yshmily

arm8686 posted on 2019-1-17 08:40 You can use the FPC soft cable to connect to the RJ45 adapter installed on the chassis. You need to make a small adapter board, using the straight-plug RJ45...

Actually, I want to connect one end of the network cable directly to the male terminal and plug it into the female terminal on the circuit board. The other end of the network cable is connected to the crystal head and directly connected to the switch. Now I am not sure if this is feasible, thank you

yshmily

qwqwqw2088 posted on 2019-1-17 08:44 You can solder on the PCB board at will, but the span cannot be too large. The network cable segment must be twisted inside. The purpose of the twisted part is to make the external interference generated on the two wires...

Actually, I want to connect one end of the network cable directly to the male terminal and plug it into the female terminal on the circuit board. The other end of the network cable is connected to the crystal head and directly connected to the switch. Now I am not sure if this is feasible, thank you

zhuyebb

I think it's OK, as long as it's not within 100M.

wsmysyn

Of course, non-standard usage is possible. 10/100M should be OK, just pay attention to the wiring and handle it well. However, if it is just soldering, it will be inconvenient to debug. If it is a terminal block, it should be better. I have seen before that USB2.0 high-speed signals are still connected with terminal blocks, not standard USB, 2.0 high-speed 480Mbps, which is not a big problem.