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
GIDDINGS & LEWIS 502-03846-00R4 (PIC900) PROCESSOR
FANUC A06B-0501-B204 SERVO MOTOR NEW OLD STOCK
AVTRON TRIMMER PROGRAMMER D14660 NEW OLD STOCK *LNC*
ABB ACH501-005-4-00P2 FREQUENCY AC DRIVE (5 HP)
ABB (ASEA DSPC 153) 2668 180-113/5 GOOD TAKEOUT
MITSUBISHI MELSEC AX80Y80C INPUT/OUTPUT UNIT
ALLEN BRADLEY 209-DSD-010X-DN (ULTRA 3000I DRIVE)
SIEMENS CFD63B100 CIRCUIT BREAKER GOOD TAKEOUT
MAYATECH CORPORATION 464290 BRAND NEW NOT IN BOX
MAYATECH CORPORATION 811077 EDGE OF WEB SENSOR NEW
