1790D-N4V0输入模块1790D-N4V0输入模块1790D-N4V0输入模块PLC的容量包括I／O点数和用户存储容量两个方面。(一)I／O点数的选择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***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。TEXASINSTRUMENTSPLC500-5024USPP5005024TEXASINSTRUMENTSPLC510-1102USPP5101102TEXASINSTRUMENTSPLC5TI-1032-1USPP5TI10321Siemens/TI575-2103CPUModuleVMEPLCTexasInstruments5752103TEXASINSTRUMENTSPLC505-6870USPP5056870ASEABROWNBOVERI5692435-RNSFP5692435RASEABROWNBOVERI086363-001NSFP086363001TexasInstruments500-5039MODICONAS-9000-810USPPAS9000810TexasInstrumentsPM550-112TEXASINSTRUMENTSPLCPFS-3630-AUSPPPFS3630AASEABROWNBOVERIDSDX-110NSFPDSDX110TexasInstruments14SlotI/OBaseModel#500-5848!TEXASINSTRUMENTS500-5047A**PanasonicACServoMotorMHMA202P1G2kWTEXASINSTRUMENTSPLC505-4332NSFP5054332TEXASINSTRUMENTSPLC505-6850BNSFP5056850BPERCEPTRON912-0008USPP9120008TEXASINSTRUMENTSPLCPM550-110USPPPM550110PanasonicMFA075LD5NSJACServoMotor750WPANASONICSERVODRIVERMfDDTA390L013KWASEABROWNBOVERI5692435-RNSFP5692435RGUTICOR100G-1M1R0USPP100G1M1R0TEXASINSTRUMENTSPLCPFS-3606-AUSPPPFS3606ACUTLERHAMMERFW3200JLNSFPFW3200JLPANASONICACSERVODRIVEMDDA153D1A441.5KWTEXASINSTRUMENTSPLC505-3516NSPP5053516PanasonicACServoDriverMSDA5A3D2A52FreeShipRELIANCEELECTRICKC170105-7USPPKC1701057ASEABROWNBOVERI68463858FNFP68463858HAYSSEN10717A0605USPP10717A0605NewandOriginalPanasonicACServoDriverMSDA043A1AWITH60DAYSWARRANTYOnePanasonicMSDA043D1AACServoDriverFreeShipASEABROWNBOVERIGNT2009473R010​0NSFPGNT2009473R010​0PanasonicMinasACServoDriverMSD041A1XXDriveASEABROWNBOVERIQFVF502USPPQFVF502MOOG152D-423AUSPP152D423ASIEMENSTI545PLCrackusedTI5451102CPUTEXASINSTRUMENTSPLC5TI-2000USPP5TI2000ALLENBRADLEY150-A35NB-ND-8​L4AUSPP150A35NBND8L4APanasonicServoDriver1kWMDD103A1VEFreeShipExpeditedshippingailableSIEMENSSIMATICTI555CPUMODULEBOARDPLC555-11015551101PANASONICACSERVODRIVERMDD203A1W200V50/60HZ2.0KW2500P/RHASEASEABROWNBOVERIACH501-010-4-0​0P2USPPACH501010400P2RELIANCEELECTRIC0-57421-2BNSFP0574212BTEXASINSTRUMENTSPLC505-CP1434TFNSFP505CP1434TFPanasonicMSDA023A1AACServoDriverNewinBoxFreeShipPANASONICM***041A2USERVOMOTOR400WMatsushitaFreShipPUMPDIVISIONPC3892R16X37​09NSFPPC3892R16X37​09AXONNETICA-ALYZR-EFSNSFPICAALYZREFSTEXASINSTRUMENTSPLC505-6851AUSPP5056851AALLENBRADLEY2755-DD4A-B1USPP2755DD4AB1PanasonicMSDA041D1AACServoDriver82V400WTexasInstrumentsParallelInputMod7MT-300#11232TEXASINSTRUMENTSPLC560-2120WUSPP5602120WBRINKMANNTL144S250NSPPTL144S250NO***ON230260SUSPP230260SASEABROWNBOVERIYB560103-AC/8USPPYB560103AC8ASEABROWNBOVERIYB560103-ANUSPPYB560103ANSimaticTI330DirectLogicPLCcompleteWithprogrammerMODICONP2-984A-816USPPP2984A816LEYBOLDSV25-109-03-51USPPSV251090351)