代PLC不仅有逻辑运算、计时、计数、顺序控制等功能，还具有数字和模拟量的输入输出、功率驱动、通信、人机对话、自检、记录显示等功能。既可控制一台生产机械、一条生产线，又可控制一个生产过程
目前，大多数PLC仍采用继电控制形式的“梯形图编程方式”。既继承了传统控制线路的清晰直观，又考虑到大多数工厂企业电气技术人员的读图习惯及编程水平，所以非常容易接受和掌握。梯形图语言的编程元件的符号和表达方式与继电器控制电路原理图相当接近。通过阅读PLC的用户手册或短期培训，电气技术人员和技术工很快就能学会用梯形图编制控制程序。同时还提供了功能图、语句表等编程语言
Siemens 6ES5 521-8MA21 6ES5521-8MA21 CP521
MKS High Vacuum Tube ISO40 ISO-F to ISO40 ISO-F Grooved 4-Hole 3"
AMATVacuum Control Feedback Board XR80
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ALLEN BRADLEY 2711P-RR256 AB 256MB RAM SO DMM 2711PRR256
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ITC LRSERIES 1-POLE FUSE HOLDER 30 A
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SIEMENS HED43B050L MCCB 50A3P 480VAC LI-LO LUGS HI-IC HED43B050 BREAKER
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FAIREY FILTRATIONFILTER ELEMENT REPLACEMENT
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SARASOTA 516 B/MS DETECTOR MODULE
Sony DC-700 Camera Adaptor with Camera Cable
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LDJ ELECTRONICS DA-15157 MAGNETIZER
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Cosel PAA15OF-24-N Power Supply P50E-12-N P50E-15-N PAA50F-5-N Lot of 7
Allen Bradley, SLCNI4, -N14, SER A, Analog Input, Very Good Condition
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