福建中立恒自动化设备有限公司

1．输入/输出单元

输入/输出单元通常也称I/O单元或I/O模块，是PLC与工业生产现场之间的连接部件。

PLC通过输入接口可以检测被控对象的各种数据，以这些数据作为PLC对被控制对象进行控制的依据；同时PLC又通过输出接口将处理结果送给被控制对象，以实现控制目的。

由于外部输入设备和输出设备所需的信号电平是多种多样的，而PLC内部CPU的处理的信息只能是标准电平，所以I/O接口要实现这种转换。

I/O接口一般都具有光电隔离和滤波功能，以提高PLC的抗干扰能力。另外，I/O接口上通常还有状态指示，工作状况直观，便于维护。

PLC提供了多种操作电平和驱动能力的I/O接口，有各种各样功能的I/O接口供用户选用。I/O接口的主要类型有：数字量（开关量）输入、数字量（开关量）输出、模拟量输入、模拟量输出等。

常用的开关量输入接口按其使用的电源不同有三种类型：直流输入接口、交流输入接口和交/直流输入接口。

常用的开关量输出接口按输出开关器件不同有三种类型：是继电器输出、晶体管输出和双向晶闸管输出。

继电器输出接口可驱动交流或直流负载，但其响应时间长，动作频率低；而晶体管输出和双向晶闸管输出接口的响应速度快，动作频率高，但前者只能用于驱动直流负载，后者只能用于交流负载。

PLC的I/O接口所能接受的输入信号个数和输出信号个数称为PLC输入/输出（I/O）点数。I/O点数是选择PLC的重要依据之一。当系统的I/O点数不够时，可通过PLC的I/O扩展接口对系统进行扩展。

2．通信接口

PLC配有各种通信接口，这些通信接口一般都带有通信处理器。

PLC通过这些通信接口可与监视器、打印机、其它PLC、计算机等设备实现通信。

PLC与打印机连接，可将过程信息、系统参数等输出打印；与监视器连接，可将控制过程图像显示出来；与其它PLC连接，可组成多机系统或连成网络，实现更大规模控制。

与计算机连接，可组成多级分布式控制系统，实现控制与管理相结合。远程I/O系统也必须配备相应的通信接口模块。

3．智能接口模块

智能接口模块是一独立的计算机系统，它有自己的CPU、系统程序、存储器以及与PLC系统总线相连的接口。

它作为PLC系统的一个模块，通过总线与PLC相连，进行数据交换，并在PLC的协调管理下独立地进行工作。

PLC的智能接口模块种类很多，如：高速计数模块、闭环控制模块、运动控制模块、中断控制模块等。

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Supermicro X8DTL-IF LGA1366 6xDDR3 Pci-e PCI 305mm x 254mm ATX Motherboards

Hard Drive Fujitsu A3C40185923 ST2000NX0253 2TB 7.2K 128MB SATA III 2.5'' Inch

Hard Drive Compaq C2490A 142214-001 2.1GB 6.4K SCSI2 50-PIN 3.5'' Hh

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HP 876937-002 EG002400JWJNN 2.4TB 10000U/min 128MB SAS-3 2.5"""""" HARD DRIVE

HP MB006000JWFVL 872290-002 6TB 7.2K 128MB SAS-3 3.5''

SEAGATE MARATHON ST9816AG 810MB 4500U/min IDE ATA 2.5"""""" HARD DRIVE

DELL 0CK3MN ST2000NX0403 2TB 7.2K 128MB SATA III 2.5" HARD DRIVE

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Hard Drive Fujitsu S26361-H223-V100 CFA540S 540MB 4500RPM SCSI 50-Pin 3.5"

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SEAGATE BARRACUDA ST1181677LW 181GB 7200U/min 4MB SCSI U160 3.5" Hard Drive

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Power Supply Huawei PAC550S12-BE 550W Fusionserver Pro 2288H V5

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Disk Toshiba MK1003MAV 1.09GB 4200U/Min 128KB Ide Ata HDD2731 2.5 " Pollici

Hard Drive Fujitsu S26361-H273-V100 ST19171WC 9.1GB 7.2K SCSI 3.5''

Motherboard Fujitsu D3236-S13 GS2 Socket 1150 ATX DDR3

Seagate Constellation Cs 2TB 7.2K 64MB SATA III 3.5'' ST2000NC001

Hard Drive Seagate Exos 7E2000 ST2000NX0403 2TB 7.2K 128MB SATA III 2.5 " Inch

Dell 0WCJNT 2x FCLGA2011-3 24x DDR4 Carte Mère Pour PowerEdge R730 R730XD

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Bloc Alimentation Huawei PAC550S12-BE 550W Fusionserver Pro 2288H V5

Disque Dur Fujitsu S26361-H273-V100 ST19171WC 9.1GB 7.2K SCSI 3.5''

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Lenovo 03T6501 2x LGA2011 16x DDR3 Pcie PCI SATA Per Thinkstation D30 C602 X79

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Dell 0VJ7CD VJ7CD ST1800MM0168 1.8TB 10000U/Min 128MB SAS-3 2.5" Inch Disk

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Disco Rigido Dell 0R69WP ST6000NM0105 6TB 7.2K 256MB SAS-3 3.5''

Disco Rigido Dell 0R69WP ST6000NM0105 6TB SAS-3 7.2K 256MB 3.5''

Disco Rigido HGST Megascale Dc 4000.B HMS5C4040BLE640 4TB 5.7K 64MB SATA III 3.5

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Hard Drive Compaq C2490A 199428-001 142214-001 50-PIN 2.1GB 5400U/Min 3.5 " Inch

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Hard Drive IBM 06H9543 85G3870 DALS-3540 540MB 4.5K SCSI 3.5''

Motherboard Advantech AIMB-781QG2 LGA1155 4x DDR3 Pcie PCI