Use the USB2.0 interface to move the hard disk box and a 20GB notebook hard disk (IC25N020ATDA04) to form a mobile hard disk. Insert the mobile hard disk into the USB front port of the computer. The system prompts “The new device is inserted, but it cannot be installed normally. , may not work properly, and the track of the mobile hard disk cannot be found in both Device Manager and Explorer. Observing the mobile hard disk, it is found that the "beep" sound is constantly appearing. The indicator light changes periodically with the sound. It is suspected that the front USB interface is insufficiently powered, and the mobile hard disk is transferred to the USB interface of the motherboard. /2 auxiliary power is not available. The test was repeated several times, and the mobile hard disk was occasionally found in the Device Manager, but it could not be used normally. This article refers to the address: http:// The hard disk and the hard disk box have been tested at the merchant. There is no problem. Why can't they be combined? I have to use the replacement method first. Bring the mobile hard disk to the office and insert it into the same computer that uses the i845G chipset (the components are basically similar, the brand is different). The test is very normal, which eliminates the possibility of the mobile hard disk getting out of the enemy. It seems that the problem is still related to the computer. Carefully compare the two computer configurations. There are motherboards and power supplies associated with the use of mobile hard disks. Continue to use the replacement method. First, replace the power supply on the computer with the power supply on the office computer. The fault is still unresolved. After that, I replaced the power supply on the office computer with the power supply on the computer. I found that the mobile hard disk can still be used normally on the office computer. Only the motherboard design is suspected. The integrated power module on the motherboard does not support the mobile hard disk that needs high current. Work has stagnated. However, another failure caused the author to find out why the mobile hard disk could not be used. Not long ago, due to the failure of the regulator (adding a voltage regulator before the power supply line), the power supply on the computer was burned. After pressing the key, the host did not react. After replacing a new Jinhetian Jinba ATX-S300 power supply. The host returned to normal, because it was not willing to move the hard disk and could not be used. It was tested again on the machine and it was completely used. After the old power supply is replaced, the mobile hard disk cannot be used anymore. Careful comparison of the new and old power supply, the new power supply in the rated power on the old power supply, mainly +5V, +5VSB output increased, and the old power supply +5VSB output on the computer is the same as the office computer power supply, +5V output Still greater than the office computer power output, it can only be related to the motherboard. By carefully checking the motherboard manual, it is found that the motherboard supports the keyboard boot function, keyboard, mouse, USB interface, etc., all use +5VSB output power supply, and the office machines do not support these functions, the +5VSB output power supply equipment is too much, Therefore, the output of +5VSB is insufficient. The mobile hard disk that requires a large current is insufficiently powered, resulting in failure to use it properly. The power requirement of the mobile hard disk is 5V, and the +5VSB output of the power supply cannot meet the demand, so it can only be found on the +5v output of the power supply. Providing it directly to the USB interface, the integrated USB interface circuit on the motherboard is not well changed, and the front USB interface on the chassis is made possible by the connection with the motherboard through the plug. Just disconnect the VCC and ground wires from the USB connector socket of the chassis from the motherboard pins and connect them to the red line (+5V) and black line (ground) in the spare power output 4PIN connector. Proceed as follows: 1. Prepare materials and tools first: one-two power adapter, two-pin socket, insulation sleeve, soldering iron, solder wire, etc. 2. Select one of the two-in-one power adapters to remove the red and black wires and cut them. 3. Place the red and black wires on the insulation cover and solder them to the (two-pin) socket. 4. Insert the ground wire and Vcc of the USB connector into the (two-pin) socket. 5. Insert the female plug in the one-two power adapter into the free plug of the power supply. The interface is changed and installed, and the mobile hard disk is connected to the modified front USB interface. The system immediately recognizes it, and the file copying, deleting, moving, and hard disk hot plugging are all normal. At this point, the transformation was successful. Field Bus cable connectors are used to support various BUS systems . The Connection Cable is designed for fixed indoor installation or occasional outdoor installation in the industrial networks. The signal wires are generally provided in the form twisted pairs. Applications: industrial automation, machinery equipment, Sensors & actors, automation process and robotic machines and field-bus system. RoHS, REACH compliant. 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