Standard usb has 4 lines, there are two power lines and two signal lines, if we only want to use USB power supply, then only need to use two of the power lines. If you want to use 2 wires to achieve the function of USB 4 wires, it is unrealistic unless you add a transfer board. The following is about several common USB terminal power cord wiring methods, I hope to help friends in need.
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1. The four cables of standard USB have a unified color, respectively: red (positive power supply), white (negative signal), green (positive signal), black (negative power supply).
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2. The standard power connector is usually a round DC connector, which is composed of an external metal shell and an internal pin, in which the metal shell is connected to the negative power supply and the internal pin is connected to the positive power supply.
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3. Directly connect the USB cable to the DC cable.
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4. Connect the type A USB connector to the DC connector. Connect pin 1 of the USB connector to the cable connected to the internal pin of the DC, and pin 4 to the cable connected to the DC shell.
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5. Type B USB and type A pin number is the same, but the order is different, and it is also necessary to distinguish between male and female.
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6. The Micro 5P USB has 5 pins, of which the fourth pin is suspended.
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7. The Mini 5P and Micro 5P have the same 5 pins, and the fourth pin can also be suspended from the signal ground. When leading out the power cable, you can only connect the power supply and the power supply.
1. First, disassemble the shell on the socket to reveal the internal circuit board and socket hole.
2. Check that the wiring terminals on the circuit board are marked with L, N, and E, respectively representing the live wire, neutral wire, and ground wire.
3. Connect the three ends of the power cable to the corresponding wiring terminals on the circuit board, that is, connect the live wire to the L terminal, the neutral wire to the N terminal, and the ground wire to the E terminal.
4. Connect the four wires of the USB socket to the corresponding wiring terminals on the circuit board. There are usually four labels, VCC, D, D-, and GND, respectively representing the power supply, data positive, data negative, and ground cables.
5. Finally, put the socket cover back, fix the screws, plug in the power supply, and test whether the socket and USB interface work normally.
considerations
1. Disconnect the power supply before connecting cables to ensure safety.
2. Confirm the wiring and then power on the test to avoid electrical damage or safety accidents caused by improper wiring.
Because of electrical safety issues, be sure to call an electrician to perform the operation.
Under normal circumstances, the 36V USB socket is directly adjusted to 5V through the DC-DC module for USB output.
If you want to make a connection, you need to determine the positive and negative terminals of the 36V input power supply and connect them to the corresponding positive and negative terminals. At the same time, the input line and output line of the DC-DC module should be connected to the 36V power line and the USB output line respectively. During the wiring process, it is necessary to pay attention to the insulation of the interface and the firmness of the connection to avoid electrical accidents caused by poor wiring or interface leakage.
1, according to the electrical equipment L1 and L2 and L3 phase line plus neutral line, no ground line or neutral line to ground.
2, according to the yellow, green and red order of L1, L2 and L3, if the phase sequence and electrical equipment is inconsistent, to switch any two phases can be.
1. First of all, confirm whether the voltage of the power cord is consistent with the rated voltage of the socket. A 36V USB socket needs a 36V power cord.
2. Open the socket panel, and insert the three cable ends of the power cable into the corresponding wiring holes: insert the red cable into the L hole, the black cable into the N hole, and the yellow\/green cable into the G hole (ground cable). If the socket supports the switch function, the control wire needs to be connected to the control switch.
3. Then connect the four wires on the USB socket. Two of them are red and two are black. Connect the red wire to the \"5V\" hole and the black wire to the \"G\" hole on the socket. Be careful not to reverse the colors.
4. Check whether the cable connector is firmly connected, then close the socket panel and start using.
To ensure safety, be sure to turn off the power before wiring.
Then, you need to connect the wires correctly to the corresponding locations according to the markings on the socket. Under normal circumstances, the socket will be marked with L, N, E, GND four positions, respectively representing the live line, neutral line, ground line and ground line. You need to connect the corresponding color of the wire to the corresponding position to ensure that the connection is strong and not loose. Finally, check whether the wiring is correct again, and confirm that it can be powered on before use.