西门子6ES7321-1CH20-0AA0PLC模块名  称：SIMATIC S7-300，数字量输入模块SM321

参  数：SIMATIC S7-300，数字量输入M 321，光电隔离，16 DI，DC 48 - 125V，20针

名  称：SIMATIC S7-300，数字量输入模块SM321

参  数：SIMATIC S7-300，数字量输入M 321，光电隔离，16 DI，DC 48 - 125V，20针

140AII33010 140DII33000C 140CRA21210C 140DDO88500C 140XCP90000
140AII33010C 140NOE77101 140EIA92100C 140DRA84000C 140XBE10000
140CHS41020 140NOM21200C 140CPS21400C 140DDO35300 140XCP90000C
140CHS41010 140ACO13000 140CPS22400 140DAM59000C 140XBP00400C
140CPU67160S 140ESI06210C 140CPS52400 140DDM69000 140XBP00300C
140CPU65260C 140ARI03010C 140CPS12420C 140DDM39000C 140CFB03200
140CPU67160C 140ATI03000C 140CRA21220C 140DDI84100C 140CFE03200
140CPU65160C 140CRP93200 140SDI95300S 140DAI34000C 140XBP00600
140CHS21000C 140CRA93200 140DSI35300C 140DAI44000C 140CFD03200
140CPU67160 140DII33000 140CRA21210 140DAO84210C 140XBP00200C
140CHS21000 140NOM21200 140CPS12420 140DAO84220C 140CPS51100
140CPU65260 140DVO85300C 140CRA21120C 140DDI67300 140XBE10000C
140CPU53414BC 140ARI03010 140CPS21400 140DDI35310 140SHS94500
140CPU65160S 140ATI03000 140DAO85300C 140DAI54000C 140DAI54300
140CPU65160 140ESI06210 140CRA21110C 140DAI74000C 140XBP00600C
140CPU53414B 140ERT85410 140CRA21220 140DDI15310 140XBP01000
140CPU65150C 140CPS42400C 140DAI35300C 140DAO84010 140XSM00200
140CPU43412UC 140EHC10500C 140DAI45300C 140XBP01600C 140DDO15310
140CPU43412AC 140EHC20200C 140CPS11420C 140DDI35300 140DAI75300
140CPU65150 140XSM01000 140EIA92100 140DAO84000 140DDI85300
140CPU43412A 140AVI03000C 140DDO35301C 140DDO84300 140DDO35301
140CPU43412U 140DVO85300 140DSI35300 140DDO88500 140DDI35300C
140CHS11000C 140CRA93101C 140DAI55300C 140DRA84000 140DAO84000C
140CHS11000 140CPS42400 140DDO15310C 140DRC83000C 140DDO84300C
140CPU11303C 140EHC20200 140DDO35310C 140CHS32000 140CPS52400C
140CPU11303 140EHC10500 140DAI75300C 140CPS11100C 140NOM21100
140CPU31110C 140AVI03000 140DDI85300C 140CPS21100C 140ACI03000
140CPU31110 140SDO95300S 140DDO35300C 140CPS51100C 140ACO02000
140NWM10000 140CRA93100C 140CRA21120 140DAM59000 140AVO02000
140AII33000C 140CRP93100C 140DDM69000C 140DAI54300C 140DDI36400
140AII33000 140CRA93101 140DAO85300 140DDM39000 140AMM09000
140AIO33000C 140CPS41400C 140CRA21110 140DDI84100 140NOA62200
140AIO33000 140NOM21100C 140HLI34000 140DAI34000 140NOM25200
140NOE77111C 140DDI36400C 140DDI15310C 140DAO84210 140NOE77101C
140CPU11302C 140ACI03000C 140DDI35310C 140DAO84220 140ACI04000
140NOE77111 140ACO02000C 140CPS11420 140DAI44000 140ACO13000C
140CPU11302 140AVO02000C 140DAI35300 140DAI54000 140CRA93200C
140DIO33000C 140DDO36400 140DAI45300 140DAI74000 140CRP93200C
140SAI94000S 140AMM09000C 140DDI67300C 140XBP01000C 140XBP00400
140DIO33000 140CRP93100 140HLI34000C 140XBP01600 140XBP00300
140NOM25200C 140CRA93100 140DAI55300 140CPS11100 140CFG01600
140ACI04000C 140CPS22400C 140DAO84010C 140CPS21100 140XTS01212
140NOC77100 140CPS41400 140DDO35310 140DRC83000 140XTS01209
140CFC03200 140XTS00206 140XTS33200 140CFU08000 140CFA04000
140CFH00800 140XTS00203 140XTS00100 140CFU40000 140XCA71706
140XTS01206 140XCP40100 140CFK00400 140CFX00210 140XTS00500
140XCA10215 140CFJ00400 140XCA71703 140XCP60000 140CFU00600
140XTS00212 140XCA10206 140XCP51000 140XCP20000 140XCP40200
140XTS01203 140XTS10206 140XCP50000 140CFX00110 140CFI00800
140XTS10215 140XBP00200 140XTS00200 140XTS00209 140XCA71709

S7-300 具有不同的通讯接口：
连接 AS-i、PROFIBUS 和 PROFINET/工业以太网总线系统的通讯处理器。用于点到点连接
的通讯处理器多点接口 MPI, 集成在 CPU 中;是一种经济有效的方案,可以同时连接编程器/PC、
人机界面系统和其它的SIMATIC S7/C7自动化系统。PROFIBUS DP进行过程通讯IMATIC 
S7-300 通过通讯处理器或通过内置的 PROFIBUS DP 接口CPU连接到 PROFIBUS DP总线
系统。带 PROFIBUS DP 主/从接口的 CPU 可以进行分布式自动化结构，可以高速通讯并且
易于使用。从用户的角度来看，PROFIBUS DP上的分布式I/O处理与集中式I/O处理没有区
别（相同的组态，编址及编程）。