Choosing the Right Board-to-Board Connectors for your Device

Consider robustness, flexibility, and processing requirements in your design to be confident that you are choosing the proper board-to-board connectors on your software. A main concern for machine designers is learn how to get sign and energy to the system in a means that doesn’t interfere with useful objectives, resembling portability, wearability, or size. Many choices can be found for connectors that help achieve these objectives. PCB terminal blocks and PCB header connector headers are generally used connectors for medical machine functions. It is necessary for designers who choose terminal blocks to think about how the PCB is linked inside of the system. In markets akin to medical devices, process automation, industrial automation, and constructing automation, units often contain a number of circuit boards within their end merchandise (Figure 1), which provides complexity to the system structure. Figure 1: Medical and industrial units typically include a number of circuit boards. Many connectivity merchandise are available in each of these configurations, however for essential functions like interface and i/O modules, controls, communication devices, and patient monitoring units in medical tools, PCBs should also meet three necessities: robustness, flexibility, and processing ability.

First, let’s have a look at robustness. Board-to-board merchandise should be very rugged and sturdy to endure the operation rigors of industrial and medical use. In excessive-vibration environments, the contact connection factors must be stable with no intermittencies. If you have any concerns relating to in which and how to use PCB connector (just click the next article), you can get hold of us at our page. A technique to realize this is by rising the variety of connection factors on the contact interface. Figure 2: Bifurcated contacts have two particular person contact points to supply an additional measure of confidence in high-vibration environments. Next, a robust mating interface will prevent contact harm if the mating connectors change into misaligned (Figure 3). High-tolerance compensation, whether or not for single or multiple mated pairs on a board, is crucial. Keying of the mating halves and indication of the primary pole on the connectors is necessary to stop mismating of the connector halves. Finally, gold plating on the contact interface allows for a high variety of mating and unmating cycles without damaging or degrading the contact interface.

Figure 3: If the mating connectors are misaligned, high-tolerance compensation is crucial. Flexibility is also necessary. For medical gear, building system, and industrial automation purposes, designers want flexibility in terms of how they orient the PCBs inside of their enclosures. Figure 4: Connectors that permit for all three PCB configurations – mezzanine, coplanar, and orthogonal – will enhance the design flexibility. Additionally, depending on the space constraints of the device, having a alternative of various pin sizes and centerline spacings is important. Common centerline spacings, like 1.27mm, are essential, but smaller centerline spacings, like 0.8mm, are more and more popular in today’s greater-density PCB designs. Perhaps of even greater importance is the power of the board-to-board connectors to have an allowance for the dimensional variations between circuit boards. This is called stack height. Figure 5: Connectors that permit for varying stack heights wouldn’t have to hold very tight tolerances on PCB stacking dimensions.

Another necessary consideration is the allowable tolerance if there is multiple connector on the board. Due to the tight centerlines, tolerance stack-ups may cause issues with multiple connectors on a board. Fortunately, connector manufacturers can take this into account when designing their connectors, in order that even with misalignments as much as 0.3mm, the connector can still present a stable connection to the mating halves. Lastly, given the high knowledge charges board-to-board connectors can handle, shielding is critical for defending towards electromagnetic interference inside gadgets. Parts processing and PCB manufacturing are yet one more critical consideration. Given the significant advances in PCB designs, the computerized placement of components, comparable to connectors, onto the PCB connector assembly is important. Because of this, high-pace board-to-board merchandise must be accessible on tape-and-reel or tray packaging to facilitate automated meeting processes. Further, since most PCBs comprise at least some floor-mount components, board-to-board connectors have to withstand the temperature profiles of a high-temperature reflow process. Connector plastics, similar to liquid crystal polymers, are perfect for this kind of course of. Finally, board-to-board connectors should allow for automatic optical inspection or other inspection strategies. While unshielded parts are simply checked with automatic optical inspection, shielded elements pose a problem, as their contacts are underneath the half to enhance shielding. Computed tomography offers an excellent resolution for most of these merchandise. By contemplating robustness, flexibility, and processing in your design, you might be confident that you’re choosing the proper board-to-board connectors in your application. Visit Phoenix Contact on-line. Like this text? Take a look at our board-to-board, terminal blocks and Methods to Specify articles, our Medical and Industrial Market Pages, and our 2020 and 2019 Article Archives.