描述
DSSR122 48990001-NK
可编程控制器（Programmable Logic Controller）简称PLC或PC，是从早期的继电器逻辑控制 系统发展而来，它不断吸收微计算机技术使之功能不断增强，逐渐适合复杂的控制任务 。
PLC之所以有生命力，在于它更加适合工业现场和市场的要求：高可靠性、强抗各种干扰的 能力、编程安装使用简便、低价格长寿命。比之单片机，它的输入输出端更接近现场设备，不需添加太多的中间部件或需要更多的接口，这样节省了用户时间和成本。PLC的下端(输入端)为继电器、晶体管和晶闸管等控制部件，而上端一般是面向用户的微型计算机。人们在应用它时，可以不必进行计算机方面的专门培训，就能对可编程控制器进行操作及编程。用来完成各种各样的复杂程度不同的工业控制任务。
自1836年继电器问世，人们就开始用导线将它同开关器件巧妙地连接，构成用途各异的逻辑 控制或顺序控制。至今，在PLC的编程语言——梯形图中还可以看到这些布线的影子。直到60年代末、70年代初可编程控制器问世，随着微电子技术、计算机技术和数据通信技术的飞速发展，以及微处理器的出现，PLC产品朝小型和超小型化方面进行了一次飞跃，最终使早期的PLC从最初的逻辑控制、顺序控制，发展成为具有逻辑判断、定时、计数、记忆和算术运算、数据处理、联网通信及PID回路调节等功能的现代PLC。
产品承诺：
保 证 全新原装进口,
保 证 安全准时发货，
保 证售后服务质量，
优势价格，大量现货。
主营DCS系统配件
机器人系统配件
大型伺服系统配件
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