GJR5251500R1101 ABB 自动化领域

GJR5251400R3202
GJR5251400R0202
GJR5251063P1
GJR5251000R0303
GJR5250900R0202
GJR5250800R0202
GJR5250500R5101
GJR5250200R1
GJR5250000R0353
GATS110112R0001
GATS110091R0201
GATS110091R0001
6GJR5252600R0201
6GJR5252600R0101

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Description

可编程控制器最早是用来代替硬接线的继电器板的,由于这些继电器板体积庞大而且接线复杂,每次控制方案改变都要重新接线,早期的PLC用逻辑关系来代替这些接线。后来,PLC的功能被大大扩充了。过去,PLC适用于离散过程控制,如开关、顺序动作执行等场所,但随着PLC的功能越来越强大,现在的PLC也开始进入过程自动化领域

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