programmable controller (pc)怎么读

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programmable controller (pc)英语什么意思：A controller used for industrial controls as direct replacements for electromech nical control relays. PCs provide the user with the benefit of solid state reliability while avoiding its pitfalls. PCs have shielding or noise immune logic i.e., designedin isolation from high voltage input/output.; 一种用于工业控制、直接取代机电继电器的控制装置,既避免了固态器件的缺点,又向用户提供了固态器件具有的可靠性高的优点。它具有屏蔽或抗噪声逻辑电路,即设计中有高电压输入输出的隔离措施。