2727-MRC1输入模块2727-MRC1输入模块2727-MRC1输入模块目前市场上经常出现继电器问题的客户现场有一个共同的特点就是：出现故障的输出点动作频率比较快，驱动的负载都是继电器、电磁阀或接触器等***负载而且没有吸收保护电路。因此建议在PLC输出类型选择和使用时应注意以下几点：1.一定要关注负载容量。输出端口须遵守允许电流限制，以保证输出端口的发热限制在允许范围。继电器的使用寿命与负载容量有关，当负载容量增加时，触点寿命将大大降低，因此要特别关注。2.一定要关注负载性质，***负载在开合瞬间会产生瞬间高压，因此表面上看负载容量可能并不大，但是实际上负载容量很大，继电器的寿命将大大缩短，因此当驱动***负载时应在负载两端接入吸收保护电路。尤其在工作频率比较高时务必增加保护电路。从客户的使用情况来看，增加吸收保护电路后的改善效果十分明显。根据电容的特性，如果直接驱动电容负载，在导通瞬间将产生冲击浪涌电流，因此原则上输出端口不宜接入容性负载，若有必要，需保证其冲击浪涌电流小于规格说明中的电流。3.一定要关注动作频率。当动作频率较高时，建议选择晶体管输出类型，如果同时还要驱动大电流则可以使用晶体管输出驱动中间继电器的模式。当控制步进电机伺服系统，或者用到高速输出/PWM波，或者用于动作频率高的节点等场合，只能选用晶体管型PLC对扩展模块与主模块的输出类型并不要求一致，因此当系统点数较多而功能各异时，可以考虑继电器输出的主模块扩展晶体管输出或晶体管输出主模块扩展继电器输出以达到配合。Panasonic1kWACServoDriverMDDA103A1AFreeShipASEABROWNBOVERI1SDA054062R1USPP1SDA054062R1ASEABROWNBOVERI3BHB002916R010​1USPP3BHB002916R010​1SQUAREDMAL36450-8041NSFPMAL364508041TEXASINSTRUMENTSPLC505-5190NSPP5055190PanasonicACServoMotorMHMA102P1CFreeShipPanasonicMFA020LE2NSCACServoMotorwith60daywarrantyASEABROWNBOVERI57772247USPP57772247TEXASINSTRUMENTSPLC500-2101USPP5002101ASEABROWNBOVERIAPTBE-03USPPAPTBE03TEXASINSTRUMENTSPLC944935-1541R-A​EUSPP9449351541RAEASEABROWNBOVERIYT213001-BAUSPPYT213001BA(AJ01)PANASONICACSERVOMOTORDRIVER1.5KWMDDCT5325B12WORKINGTEXASINSTRUMENTSPLC500-2101NSFP5002101CUTLERHAMMERA202K47USPPA202K47ASEABROWNBOVERIYT212001-AEUSPPYT212001AEYASKAWAELECTRICCACR-SR10BY1SS​Y9USPPCACRSR10BY1SSY​9ASEABROWNBOVERI1911RA00140000​0STDUSPP1911RA00140000​0SASEABROWNBOVERIDS-112USPPDS112OnePanasonicACServoDriverMSDA083D1A750WFreeShipALLENBRADLEY1326-CCUT060NSFP1326CCUT060PERCEPTRON911-0007USPP9110007ALLENBRADLEY7300-UMG-1USPP7300UMG1TEXASINSTRUMENTSPLC505-6108NSPP5056108MITSUBISHISJ-4-V7.5-11MNSFPSJ4V7511MDV80X220MR5PANASONICACSERVODRIVERDV80XINPUT200VOUTPUT2.2KW2500ENCODERASEABROWNBOVERIACS601-0070-5-​000B1200800USPPACS60100705000​B1SAFTRONICSCIMR-H11G2-E-1​0USPPCIMRH11G2E10KOLLMORGENINDSERVOST***03ASUSPPSERVOST***03ASALLENBRADLEY1784-KTK1NSPP1784KTK1ASEABROWNBOVERIS6N600BW-4USPPS6N600BW4TexasInstrumentsRTU-T056A&520-058SIEMENSSIMATICTI555CPUMODULEBOARDPLC555-11015551101TEXASINSTRUMENTSPLC505-4308USPP5054308SiemensTI565PLCMemoryCard560-2134TexasInstruments500SeriesPLCPart#520C-1102ASEABROWNBOVERIYB161100-BBUSPPYB161100BBTEXASINSTRUMENTSPLC505-7101NSFP5057101ASEABROWNBOVERI6024BP10300CNSFP6024BP10300CASEABROWNBOVERI29089124USPP29089124GOULDSHAWMUTA055C1D0R0-300​ENSFPA055C1D0R0300ETEXASINSTRUMENTSPLCRI-STU-655A-00NSFPRISTU655A00PanasonicMGDA093A1AACSERVODRIVERFreeShip(AB01)ACSERVODRIVERPANASONICMSD-11A1XX21WORKINGPanasonicMSD023A1XXVACServoDriverKOLLMORGENINDSERVOSTAR-603USPPSERVOST***03ASEABROWNBOVERIYT204001-BPUSPPYT204001BPKISTLERMORSESONO-2BAABAGNUSPPSONO2BAABAGNTEXASINSTRUMENTSPLCPFS-3611USPPPFS3611PERCEPTRON911-0010USPP9110010ASEABROWNBOVERIIOP-05USPPIOP05ASEABROWNBOVERIYPQ-110AUSPPYPQ110ATEXASINSTRUMENTSPLC500-5027NSPP5005027SIEB&MEYER26.44.29NSFP264429ASEABROWNBOVERI1911RA00140000​0STDUSPP1911RA00140000​0SPanasonicDV451S075ACServoDriveTEL8SS4OpenCassetteACServoZDriver,Panasonic-MSD5​A1A1XX21REXROTHLTE-45USPPLTE45IMPCO19181-01NSFP1918101ELECTROCRAFT9101-2161USPP91012161TEXASINSTRUMENTSPLC131547-007USPP131547007MOELLERELECTRICTPY3-415/480-1​10L-2BUSPPTPY3415480110L​2BSUNXLTDMS-SF1-BNSFPMSSF1B)