MFAC14K1AA0001A ALSTOM 阿尔斯通辅助变速继电器

MFAC14K1AA0001A ALSTOM 阿尔斯通辅助变速继电器

PAD 程序员需要做的就是将变量映射到可编程设备的输入和输出。此外，越来越多的 PAD 编程软件提供了离线生成项目、将其放在存储卡上，然后在设备中使用它的可能性。根据Control Engineering的研究，在 2004-2006 年期间，许多用户不确定 PAC 是什么。

2007 年，6% 的用户报告用 PAC 替换了现有的 PLC。但在 2006 年和 2007 年，大约 20% 的用户报告补充了他们现有的 PLC 系统。这表明 PAC 目前并没有取代 PLC，而是 PLC 在不断发展。PAD 是 PLC 发展过程中的一小步，但却是的一步。

虽然 PAC 是当今的控制解决方案，但 PAD 是更的控制系统类别，对于更有经验的工程师来说，它看起来与 PLC 非常相似。编程接口更接近 PLC 而不是 PAC，但 PAD 为高级工程师提供的可能性是惊人的。电流隔离是物理和电气隔离两个电路的原理，这样就没有直接的传导路径，但数据和电源仍然可以交换。这通常使用变压器、光耦合器或电容器来实现。隔离用于保护电路和人体、断开接地环路以及提高共模电压和噪声抑制性能。

All a PAD programmer needs to do is map the variables to the inputs and outputs of the programmable device. In addition, more and more PAD programming software offers the possibility of generating an item offline, putting it on a memory card, and then using it in the device. According to research by Control Engineering, during the period 2004-2006, many users were unsure what a PAC was.

In 2007, 6% of users reported replacing their existing PLCS with PACs. But in 2006 and 2007, about 20% of users reported supplementing their existing PLC systems. This shows that the PAC is not currently replacing the PLC, but the PLC is constantly evolving. PAD is a small step in the development of PLC, but it is a step.

While PAC is the control solution of the day, PAD is the more control system category and to a more experienced engineer it looks very similar to a PLC. The programming interface is closer to a PLC than a PAC, but the possibilities offered by the PAD to advanced engineers are amazing. Current isolation is the principle of physically and electrically isolating two circuits so that there is no direct conduction path, but data and power can still be exchanged. This is usually done using transformers, optical couplers, or capacitors. Isolation is used to protect circuits and human bodies, disconnect ground loops, and improve common-mode voltage and noise suppression.