描述
FX2N系列中定时器时可分为通用定时器、积算定时器二种。它们是通过对一定周期的时钟脉冲的进行累计而实现定时的，时钟脉冲有周期为1ms、10ms、100ms三种，当所计数达到设定值时触点动作。设定值可用常数K或数据寄存器D的内容来设置。
Allen Bradley Expansion Unit SLC 150 1745-E157 A
1745-M1 Allen Bradley PLC SLC EEPROM Memory Mod 1745M1
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Allen Bradley SLC100 PLC SLC100 1745-E101
ALLEN BRADLEY 1745-E151 SER. B
ALLEN BRADLEY SLC 100 1745-LP101 CPU
1745-PCC Allen Bradley SLC 150 1745-PCC N818
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Allen Bradley 1745-B1 Battery Assembly Series A NEW
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Allen Bradley Analog Input Exp. Unit 1745-E106/A USED!
ALLEN BRADLEY SLC 100 1745-LP101 SER. A PROCESSOR UNIT
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Allen Bradley SLC500 DC Sink Input Card 1745-IB16
ALLEN BRADLEY 1745-LP103 SER D FRN 5
Allen-Bradley 1745-E155 high speed input module
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