描述
A，B为输入逻辑变量，M为输出逻辑变量，它们之间的“与”、“或”、“非”逻辑运算关系如表1．1所示。用继电器电路或梯形图可以实现基本逻辑运算，触点的串联可实现“与”运算，触点的并联可实现“或”运算，用常闭触点控制线圈可实现“非”运算(见图1-4)。多个触点的串、并联电路可以实现复杂的逻辑运算，例如图l-3中的继电器电路实现的逻辑运算可用逻辑代数表达式表示为KM=(SBI+KM)·SB2·FR
1745-E151/A Allen Bradley SLC 150 1745E151 N833
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Allen Bradley 1745-E101 Expansion Unit
Allen Bradley 1745-M1/1745M1 Ser B Memory
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ALLEN BRADLEY 1745-E101 PROGRAMMABLE CONTROLLER
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Allen Bradley 1745-E101 1745E101 SLC 100 Expansion Unit
1745-E151/A ALLEN BRADLEY SLC-150 EXPANSION UNIT
ALLEN BRADLEY 1745-LP101 PROGRAMABLE CONTROLLER
ALLEN BRADLEY 1745-C1 USPP 1745C1
