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。
DETCON %LEL MODEL 10 GAS DETECTION CONTROLLER MODULE
DETCON 370-399100-000 OXYGEN FIELD REPLACEABLE PLUG-IN SENSOR
DETCON 370-399100-000 OXYGEN FIELD REPLACEABLE PLUG-IN SENSOR
DETCON MODEL 10A LEL MONITOR % LEL PCB REV.A 500-503200-000 / FAST SHIP
DETCON MODEL 10A LEL MONITOR % LEL PCB REV.A 500-503200-000 / FAST SHIP
DETCON PPM H2S GAS DETECTION CONTROLLER 440-005101-000 REV.001 MODEL 10C
DETCON PPM H2S GAS DETECTION CONTROLLER 440-005101-000 REV.001 MODEL 10C
DETCON PPM H2S GAS DETECTION CONTROLLER 440-005101-000 REV.001 MODEL 10C
DETCON PPM H2S GAS DETECTION CONTROLLER 440-005101-000 REV.001 MODEL 10C
DETCON PPM H2S MODEL 10 GAS DETECTION CONTROLLER MODULE
DETCON PPM H2S MODEL 10 GAS DETECTION CONTROLLER MODULE
Det-tronics EQ2100IM Lon Isolator 18-30v-dc EAGLE QUANTUM
Det-tronics EQ2100IM Lon Isolator 18-30v-dc EAGLE QUANTUM
Det-tronics EQ2100IM Lon Isolator 18-30v-dc EAGLE QUANTUM
Det-tronics EQ2100IM Lon Isolator 18-30v-dc EAGLE QUANTUM
DET-TRONICS MODEL EQ25EMSAMS SAM PCB CARD
DET-TRONICS MODEL EQ25EMSAMS SAM PCB CARD
DET-TRONICS MODEL EQ25EMSAMS SAM PCB CARD
DET-TRONICS MODEL EQ25EMSAMS SAM PCB CARD
DEVERSIFIED TECHNOLOGY 651400975 BOARD
DEVERSIFIED TECHNOLOGY 651400975 BOARD
DEVLIEG MACHINE CO. 2R2117 PC BOARD
DEVLIEG MACHINE CO. 2R2117 PC BOARD
DEVLIEG MACHINE CO. 2R2117 PC BOARD
DEVLIEG MACHINE CO. 2R2117 PC BOARD
DIAGRAPH/ ITW 5765520-02REVAIDS PC BOARD 5765-520 REV. B
DIAGRAPH/ ITW 5765520-02REVAIDS PC BOARD 5765-520 REV. B
DIAMOND POWER 707690-1037 TRANSFER PULSER BOARD 7076901037
DIAMOND POWER 707690-1037 TRANSFER PULSER BOARD 7076901037
DIAMOND RADEON HD 4350 GRAPHICS CARD
DIAMOND RADEON HD 4350 GRAPHICS CARD
DIEBOLD FASCIA CCA 49-007296-000A CONTROL BOARD 49007296000A
DIEBOLD FASCIA CCA 49-007296-000A CONTROL BOARD 49007296000A
DIEBOLD FASCIA CCA 49-007296-000A CONTROL BOARD 49007296000A
DIEBOLD FASCIA CCA 49-007296-000A CONTROL BOARD 49007296000A
DIENES 0/05310A CONTROL BOARD 005310A
DIENES 0/05310A CONTROL BOARD 005310A
DIENES 0/05310A CONTROL BOARD 005310A
DIENES 0/05310A CONTROL BOARD 005310A
DIESSEL TL3220.492A PC BOARD
DIESSEL TL3220.492A PC BOARD
DIGI 30000642 REV. B 8-PORT PC BOARD
DIGI 30000642 REV. B 8-PORT PC BOARD
DIGI 77000771 CLASSIC BOARD 4 PCI 5V W/POWER
DIGI 77000771 CLASSIC BOARD 4 PCI 5V W/POWER
DIGI 77000771 CLASSIC BOARD 4 PCI 5V W/POWER
DIGI 77000771 CLASSIC BOARD 4 PCI 5V W/POWER
DIGI INTERNATIONAL 20-101-0430 BOARD BL2000, 201010430
DIGI INTERNATIONAL 20-101-0430 BOARD BL2000, 201010430
DIGI INTERNATIONAL 20-101-0430 BOARD BL2000, 201010430
DIGI INTERNATIONAL 20-101-0430 BOARD BL2000, 201010430
DIGITAL AUTOMATION M9047 GRANT CONTINUITY CARD
DIGITAL AUTOMATION M9047 GRANT CONTINUITY CARD
DIGITAL M7270 PROCESSOR BOARD
DIGITAL M7270 PROCESSOR BOARD
DIGITAL TECHNIQUES CORP. 775-011-1 PC BOARD 7750111
DIGITAL TECHNIQUES CORP. 775-011-1 PC BOARD 7750111
DIGITAL TECHNIQUES CORP. 775-011-1 PC BOARD 7750111
DIGITAL TECHNIQUES CORP. 775-011-1 PC BOARD 7750111
DIGITAL TECHNIQUES CORP. DT-411-1 TOOL CONTROL CARD DT4111
DIGITAL TECHNIQUES CORP. DT-411-1 TOOL CONTROL CARD DT4111
DIGITAL TECHNIQUES CORP. DT-411-1 TOOL CONTROL CARD DT4111
DIGITAL TECHNIQUES CORP. DT-411-1 TOOL CONTROL CARD DT4111
DIODE BOARD SV-1030-0001 1312-D-1008-9 1704-C-5002
DIODE BOARD SV-1030-0001 1312-D-1008-9 1704-C-5002
DISPENSE SOURCE INC. 310-0007 CONTROL BOARD 3100007
DISPENSE SOURCE INC. 310-0007 CONTROL BOARD 3100007
DISPENSESOURCE 204-0004 CONTROL BOARD 2040004
DISPENSESOURCE 204-0004 CONTROL BOARD 2040004
DISPENSESOURCE 204-0004 CONTROL BOARD 2040004
DISPENSESOURCE 204-0004 CONTROL BOARD 2040004
DMS GRAPHICS CARD HRG-6 VERSION 3.0 HRG-KI
DMS GRAPHICS CARD HRG-6 VERSION 3.0 HRG-KI
DOBOY 198150 BOARD
DOBOY 198150 BOARD
DOBOY 312875 CONTROL BOARD D250C
DOBOY 312875 CONTROL BOARD D250C
DOBOY 312875 CONTROL BOARD D250C
DOBOY 312875 CONTROL BOARD D250C
DOLD 203472 PCB CARD
DOLD 203472 PCB CARD
DOMINO 21304 INK MONITOR BOARD 21411 REV A
DOMINO 21304 INK MONITOR BOARD 21411 REV A
DOMINO 23078B PC BOARD 23178 23078
DOMINO 23078B PC BOARD 23178 23078
DOMINO 23163 MONITOR BOARD 23163
DOMINO 23163 MONITOR BOARD 23163
DOMINO 23163 MONITOR BOARD 23163
DOMINO 23163 MONITOR BOARD 23163
DOMINO 23172 CONTROL BOARD
DOMINO 23172 CONTROL BOARD
DOMINO 25109 EXTERNAL INTERFACE BOARD
DOMINO 25109 EXTERNAL INTERFACE BOARD
DOMINO 25109 EXTERNAL INTERFACE BOARD
DOMINO 25109 EXTERNAL INTERFACE BOARD
DOMINO 25115 INK SYSTEM INTERFACE BOARD
DOMINO 25115 INK SYSTEM INTERFACE BOARD
DOMINO 25115 INK SYSTEM INTERFACE BOARD
DOMINO 25115 INK SYSTEM INTERFACE BOARD
DOMINO CODING SOLUTIONS WED8P001SRA01P0059 12995 BACKUP RESTORE CARD
DOMINO CODING SOLUTIONS WED8P001SRA01P0059 12995 BACKUP RESTORE CARD
DOMINO CODING SOLUTIONS WED8P001SRA01P0059 12995 BACKUP RESTORE CARD
DOMINO CODING SOLUTIONS WED8P001SRA01P0059 12995 BACKUP RESTORE CARD
DOORKING 4501-010 PC BOARD 4501010
DOORKING 4501-010 PC BOARD 4501010
DOORKING 4501-010 PC BOARD 4501010
DOORKING 4501-010 PC BOARD 4501010
DORSCH MIKROSYSTEM LAN-3 MODULER CARD
DORSCH MIKROSYSTEM LAN-3 MODULER CARD
DOWTY HYDRAULICS PCB MODULE 3000.000.04 / FAST SHIP DHL OR FEDEX
DOWTY HYDRAULICS PCB MODULE 3000.000.04 / FAST SHIP DHL OR FEDEX
DPS 0034BS10 VOLTAGE TRANSDUCER BOARD
DPS 0034BS10 VOLTAGE TRANSDUCER BOARD
DPS 0034BS10 VOLTAGE TRANSDUCER BOARD
DPS 0034BS10 VOLTAGE TRANSDUCER BOARD
DPS 0034BS10 VOLTAGE TRANSDUCER BOARD
DPS 0034BS10 VOLTAGE TRANSDUCER BOARD
DR.E.HORN EA 96X96.2 S 1 W DW SPEED INDICATOR
DR.E.HORN EA 96X96.2 S 1 W DW SPEED INDICATOR
DREGGEN CRANE AS PCB MODULE DCS914-01 / FAST SHIP DHL OR FEDEX
DREGGEN CRANE AS PCB MODULE DCS914-01 / FAST SHIP DHL OR FEDEX
DREGGEN CRANE DCS903-02 PCB MODULE
DREGGEN CRANE DCS903-02 PCB MODULE
DREGGEN CRANE DCS903-02 PCB MODULE
DREGGEN CRANE DCS903-02 PCB MODULE
DREGGEN CRANE DCS904-01 PCB MODULE
DREGGEN CRANE DCS904-01 PCB MODULE
DRILLERS CONSOLE INPUT OUTPUT MODULE PCB BOARD EL10-2500-00 / FAST SHIP
DRILLERS CONSOLE INPUT OUTPUT MODULE PCB BOARD EL10-2500-00 / FAST SHIP
DRILLERS CONSOLE INPUT OUTPUT MODULE PCB BOARD EL10-2500-00 / FAST SHIP
DRILLERS CONSOLE INPUT OUTPUT MODULE PCB BOARD EL10-2500-00 / FAST SHIP
DRUCK PDCR 921-1742 SENSOR 5 VOLTS /-500 MBAR
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