![]() ![]() All USB connectors are designed with this in mind. Robust power connection - It's important for the power pins to make connection before the data lines, to avoid trying to power the device over the data lines.This is important to keep the signal intact in environments with a lot of electrical "noise". Shielding - USB connectors are shielded, such that a metal shell which is not part of the electrical circuit is provided.USB connectors are designed to transmit 5V, up to 500mA. These are for power, ground, and two data lines (D+ and D-). Four contacts - All USB connectors have at least four contacts (although some may have five, and USB 3.0+ connectors have even more).It may be possible to force a connector in wrong, but that will result in damage to the device. Polarization - A USB connector can only nominally be inserted one way.However, all USB connectors will have some things in common: In the USB standard, there is a difference between the two, and the connectors on cables and devices reflect this. USB connectors come in two flavors: host and peripheral. We'll discuss this more in the examples section for each individual connector. The term "mount" can refer to several things: how the connector is mounted in use (panel mount, free-hanging, board mount), what the angle of the connector is relative to its attachment (straight or right-angle), or how it is mechanically attached (solder tab, surface mount, through hole). Mount - This one has the potential for being confusing. It's important that you select a connector with a suitable life for the application. A USB connector may have a lifetime in the thousands or tens of thousands of cycles, while a board-to-board connector designed for use inside of consumer electronics may be limited to tens of cycles. Datasheets usually present that information in terms of mating cycles, and it varies widely from one technology to another. Mating cycles - Connectors have a finite life, and connecting and disconnecting them is what wears them out. Water protection rating (represented by the second X)Ģ: When the outer casing is tilted to 15 degrees, the water drops drip into the outer casing without affectingģ: Water or rain has no effect from the 60 degree corner to the outer casingĤ: The liquid is splashed from other directions to the outer casing without damage.The pitch of the pins on the headers on a standard Arduino is. Equivalent to a line or tool Ĥ: Avoid the entry of solids larger than 1.0mm, equal to one line or peeling line ĥ: Avoid dust full entry and cause damage Sma waterproof connector ip68 waterproof test is: ensure that the water depth of 10 meters, work for two weeks, without water put into the water depth of 100 meters, damage test for 12 hours, still can maintain the good performance of the product.ĭegree of protection against solids (first X)ġ: Avoid intrusion of solids above 50mm, equivalent to the length of one hand Ģ: Prevent 12.5mm solid intrusion equal to the length of 1 finger ģ: Avoid 2.5mm entry into the intrusion. The severity is naturally higher than the protection level below. The test equipment, experimental standards and test time need to be recognized by both the supplier and the buyer. ![]() Therefore, the highest waterproof rating of the waterproof connector is ip68.ĭifferent ip waterproof connector grades have different standards, especially in the ip68 waterproof grade test. The second digit is from 0 to 8, and the maximum rating is 8. The first digit is from 0 to 6, and the maximum rating is 6. The key is to look at the two digits XX behind the ipXX. The resolution criteria for the sealing performance of waterproof sma connectors are known to many people, that is to say the IP waterproof rating standard. ![]()
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