IS200SRLYH2A GE

3HAC7561-3 ABB
3HAC7587-1 ABB
3HAC7652-1 ABB
3HAC7682-1 ABB
3HAC7706-1 ABB
3HAC7727-1 ABB
3HAC7742-1 ABB
3HAC7775-1 ABB
3HAC7788-1 ABB

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描述

继电器控制是通过元件之间的硬接线来实现的,因此其控制功能就固定在线路中了,因此功能专一,不灵活;而PLC控制是通过软件编程来解决的,只要程序改变,功能可跟着改变,控制很灵活。又因PLC是通过循环扫描工作的,不存在继电器控制线路中的联锁与互锁电路

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