描述
继电器结构示意图，它主要由电磁线圈、铁心、触点和复位弹簧组成。继电器有两种不同的触点，在线圈断电时处于断开状态的触点称为常开触点(如图1-2中的触3，4)，处于闭合状态的触点称为常闭触点(如图1-2中的触点1，2)。
1745-PT1 Allen Bradley SLC 150 1745-PT1 N817
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1745-E105/C Allen Bradley SLC 100 Exp Unit 1745E105
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ALLEN BRADLEY 1745-PCC SLC INTERFACE CONVERTOR **XLNT**
1745-E103/B Allen Bradley SLC Expansion 1745-E103 N809
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1745-E156/A Allen Bradley SLC 150 1745E156 N830
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1745-E101 Allen Bradley SLC100 Expansion Unit
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1745-LP101 Allen Bradley SLC100 Processor Unit
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