ROCKWELL/罗克韦尔1746-P4

PLC平均的I／O点的价格还比较高，因此应该合理选用PLC的I／O点的数量，在满足控制要求的前提下力争使用的I／O点较少，但必须留有一定的裕量。

通常I／O点数是根据被控对象的输入、输出信号的实际需要，再加上10％~15％的裕量来确定。

 (二) 存储容量的选择

用户程序所需的存储容量大小不仅与PLC系统的功能有关，而且还与功能实现的方法、程序编写水平有关。一个有经验的程序员和一个初学者，在完成同一复杂功能时，其程序量可能相差25％之多，所以对于初学者应该在存储容量估算时多留裕量。

PLC的I／O点数的多少，在很大程序上反映了PLC系统的功能要求，因此可在I／O点数确定的基础上，按下式估算存储容量后，再加20％~30％的裕量。

存储容量（字节）＝开关量I／O点数×10 ＋ 模拟量I／O通道数×100

另外，在存储容量选择的同时，注意对存储器的类型的选择。

ABB 3BSE038415R1 AO810V2 8 channel 0..2mA


ABB 101-004A2, SDS101-004A2-67?0V00, 3ADT211033R 


ABB ASEA CIRCUIT BOARD CARD DSPC157 57310001-GP 2668 184-238/2


ABB ASEA CIRCUIT BOARD CARD DSPC157  ME7A 57310001-GP/1 2668 184-238/1


ABB ASEA CIRCUIT BOARD CARD DSPC157  ME7B 57310001-GP/2 2668 184-238/1


ABB PC  BOARD NPOW42-62c NPOW42


ABB APGIC03 General Interface Board E-32235 


ABB CIRCUIT BOARD CARD ASEA DSPC157  OD 57310001-GP/2 57310001GP/2


ABB CIRCUIT BOARD CARD ASEA DSPC157  OD 57310001-GP/2 2668 184-238/1


ABB CONTACTOR AF260-20 


ABB Main Circuit Interface Board 61431390B 1/410564947


ABB 10Base2 Fieldbus cheaernet 37262-4-0369565 


ABB ASEA YPK 107A YT204001-CB/2 


ABB ASEA Circuit Board Card 2668171-15/3 YM321001-Z 


ABB ASEA Board Card 2668 170-318 YM321001-AN 


ABB FISHER & PORTER CIRCUIT BOARD CARD 686B264U09 


ABB FISHER & PORTER CIRCUIT BOARD CARD 686B264U05


ABB DFE02 Feldbus Module AUI 37262-4-0369566 DFE 02, 0369566 0022 00


ABB Process Controller 53MC5212B45BBXX?ACAXX 53MC52 53MC5212


ABB ASEA CIRCUIT BOARD CARD DSPC 150 DSPC150 57310256-AF/3 57310256AF/3


ABB Board Card 5731 0256-DB DSBC-170 2668 182/128


ABB MOUNTING BASE HARMONY RELAY P-HB-IOR-8000N2?00 


ABB Fieldbus M Profibus DPV1 DFM 01 37262-4-0369570 


ABB Freelance 2000 Fieldbus M. Serial Module Dual 37262-4-0369571 


ABB DRIVE ACS401600632 


ABB ASEA CIRCUIT BOARD CARD DSPC 157 8C DSPC157 57310001-GP/2 57310001GP/2


ABB ASEA CIRCUIT BOARD CARD YYT 102C YT212001-AK/5 2668 180-89/3


ABB ASEA CIRCUIT BOARD CARD YYT 102C YT212001-AK/7 2668-180-89/3


ABB LIMELITE 2000 AMPLIFER DMK-12A 


ABB ASEA CIRCUIT DSQC 129 YB161102-BV/1 2668 182-82/1


ABB ASEA CIRCUIT DSQC 129 0C OC YB161102-BV/1 2668 182-82/3


ABB CONDUCTIVITY ANALYZER TB84EC1000321 TB84EC 240 V 240V


ABB BAILEY CONTROLS INPUT MODULE DIGITAL 8ch 120V ac/dc DI820 


ABB BAILEY CONTROLS INPUT MODULE DIGITAL 8ch 230V ac/dc DI821 


ABB FISHER & PORTER CIRCUIT  686B217U01 


ABB ASEA YPK 107A YT204001-CB/2 


ABB FREELANCE 2000 FIELDCONTROLLER MINBOARD P 37261-4-0369528 


ABB ASEA CIRCUIT BOARD CARD DSQC 129 OB 0B YB161102-BV/1 2668 182-82/3


ABB ASEA CIRCUIT BOARD CARD DSQC 129 6K YB161102-BV/1 2668 182-82/3


ABB ASEA CIRCUIT BOARD CARD DSQC 129 7C YB161102-BV/1 2668 182-82/3


ABB MOUNTING BASE HARMONY RELAY P-HB-RMU-8000N2?00  RMU-800


ABB PRESSDUCTOR SYSTEM  PFRA101 BA871-1 3BSE003 911R0001


ABB FIELD CONTROLLER FREELANCE 2000 POWER SUPPLY P 37264-4-0369561 115/230v


ABB DISCONNECT SWITCH OESA-F100JT6-2 100 AMP 100A A


EEI Power Interface Board 604-165 BEL625 42-402089 


ABB ASEA CIRCUIT BOARD CARD DSPC 153 DSPC153 57310256BA/2 2668 180-113/5


ABB ASEA CIRCUIT BOARD CARD DSPC 153 DSPC153 57310256-BA/1 2668 180-113/5


ABB FISHER & PORTER CIRCUIT  686B384-U05