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。
以下链接皆有货
HP C7710A Scan Jet Automatic Document Feeder
HP C7710A Scan Jet Automatic Document Feeder
HP C7710A Scan Jet Automatic Document Feeder C
HP C7710A Scan Jet Automatic Document Feeder C
HP C9736A Image Fuser Kit
HP C9736A Image Fuser Kit
HP CE272A 650A Laserjet Yellow Toner As Is
HP CE272A 650A Laserjet Yellow Toner As Is
HP DAT160 Q1581A External Tape Drive
HP DAT160 Q1581A External Tape Drive
HP DL360 G5 Rack Mount Server
HP DL360 G5 Rack Mount Server
HP DL360G5 Server w/ Missing Part
HP DL360G5 Server w/ Missing Part
HP DL380 G4 Rack Mount Server
HP DL380 G4 Rack Mount Server
HP DL380 Proliant Server
HP DL380 Proliant Server
HP E1212A I/O Boards
HP E1212A I/O Boards
HP E1217A E1222-66564 E122269564 Rev.A PMU Board
HP E1217A E1222-66564 E122269564 Rev.A PMU Board
HP E1222-66565 E122266565 Boards
HP E1222-66565 E122266565 Boards
HP E1421B Mainframe w/ E1333A, E1466-66202, E1328A, E1406A
HP E1421B Mainframe w/ E1333A, E1466-66202, E1328A, E1406A
HP E3003-61041 E300361041 SYS IF CARD #1
HP E3003-61041 E300361041 SYS IF CARD #1
HP E3003-61058 E300361058 Time Measure
HP E3003-61058 E300361058 Time Measure
HP E3610A DC Power Supply 0-8V,0-3A/0-15V,0-2A w/ Dents & Missing Button
HP E3610A DC Power Supply 0-8V,0-3A/0-15V,0-2A w/ Dents & Missing Button
HP E6978-66530 E697866530 3852 Board
HP E6978-66530 E697866530 3852 Board
HP Hewlett Packard 08657-60978 0865760978 Circuit Board for HP 8657A
HP Hewlett Packard 08657-60978 0865760978 Circuit Board for HP 8657A
HP Hewlett Packard 3456A Digital Voltmeter Front Panel Display Assembly
HP Hewlett Packard 3456A Digital Voltmeter Front Panel Display Assembly
HP Hewlett Packard 42841A 0-20A Bias Current Source
HP Hewlett Packard 42841A 0-20A Bias Current Source
HP Hewlett Packard G1322A Series 1100 On-Line Vacuum Degasser w/ Tray
HP Hewlett Packard G1322A Series 1100 On-Line Vacuum Degasser w/ Tray
HP HP3235Z Analog Bus Access Module
HP HP3235Z Analog Bus Access Module
HP J4107A Jetdirect 4000
HP J4107A Jetdirect 4000
HP MSL6030 Series ED1005 HP Storage Works MSL6000 Series Library
HP MSL6030 Series ED1005 HP Storage Works MSL6000 Series Library
HP P2466AV Netserver LP1000r PIII/1000
HP P2466AV Netserver LP1000r PIII/1000
HP PC-P-86-94V-0 06011-60020 0601160020 HP-6011A DC Power Supply Board
HP PC-P-86-94V-0 06011-60020 0601160020 HP-6011A DC Power Supply Board
HP PC-P-86-94V-0 06023-60021 0602360021 Board
HP PC-P-86-94V-0 06023-60021 0602360021 Board
HP Proliant DL380 G5 X5450 3.0GHz S/N: SGH537X0WZ
HP Proliant DL380 G5 X5450 3.0GHz S/N: SGH537X0WZ
HP Q3998-80102 BQ399880102 w/ 5851-1904 REVA Board for Q7493A DISCO DAD341
HP Q3998-80102 BQ399880102 w/ 5851-1904 REVA Board for Q7493A DISCO DAD341
HP Yokogawa 0950-3017 PS605-0101 Power Supply
HP Yokogawa 0950-3017 PS605-0101 Power Supply
HP Yokogawa 0950-3018 PS602-0101 Power Supply
HP Yokogawa 0950-3018 PS602-0101 Power Supply
HP-30-10119-01 1028830 Board
HP-30-10119-01 1028830 Board
HPtec F50056-2 F50056A-2 SDQA-220mn Board
HPtec F50056-2 F50056A-2 SDQA-220mn Board
Hptec HP-CUI016 F30677-1 HPCUI016 F306771 Board
Hptec HP-CUI016 F30677-1 HPCUI016 F306771 Board
Hptec HP-CUMC4 HPCUMC4 Board
Hptec HP-CUMC4 HPCUMC4 Board
HS3203 DC Motor Driver
HS3203 DC Motor Driver
HS3505 DC Motor Driver
HS3505 DC Motor Driver
HSG 60 HSG60 Ionization Device
HSG 60 HSG60 Ionization Device
HSI0-48W HSI048W Board
HSI0-48W HSI048W Board
Huawei Optix METRO 500 OPTIXMETRO500
Huawei Optix METRO 500 OPTIXMETRO500
Huawei Optix RTN 600 15G-SP 15S0420APS
Huawei Optix RTN 600 15G-SP 15S0420APS
Huawei R4850N1 Power Supply Unit 53.5V 50A 53.5VDC 22.4A
Huawei R4850N1 Power Supply Unit 53.5V 50A 53.5VDC 22.4A
Huawei RTN XMC 8G-2 52412596 Outdoor Unit
Huawei RTN XMC 8G-2 52412596 Outdoor Unit
Huawei SL61FH2A01 SL61PXC 020CAF6TA1602251
Huawei SL61FH2A01 SL61PXC 020CAF6TA1602251
Huawei TRX 250K 1900M
Huawei TRX 250K 1900M
Hughes 2100 Ultrasonic Monitor
Hughes 2100 Ultrasonic Monitor
Hugle 312A Ion Divider Electrostatic Elimination
Hugle 312A Ion Divider Electrostatic Elimination
Hugle Electronics 3180-1005-2 318010052 Boards 30Days Warranty
Hugle Electronics 3180-1005-2 318010052 Boards 30Days Warranty
Hugle Electronics 420PN Ionizer Controller
Hugle Electronics 420PN Ionizer Controller
Hugle Electronics Inc 301 Ionizer
Hugle Electronics Inc 301 Ionizer
Hukk Engineering CR1200R-01 CR1200R01 Digital Signal Analyser C
Hukk Engineering CR1200R-01 CR1200R01 Digital Signal Analyser C
Human Machine Interface DOP-AS57BSTD DOPAS57BSTD Touch Panel 30Days Warranty
Human Machine Interface DOP-AS57BSTD DOPAS57BSTD Touch Panel 30Days Warranty
Humo HRS-404B HRS404B C Meter Switching Unit
Humo HRS-404B HRS404B C Meter Switching Unit
HUMO ILT-6400 ILT6400 Intelligent Leakage Tester Front Panel Assy
HUMO ILT-6400 ILT6400 Intelligent Leakage Tester Front Panel Assy
Humo Laboratory HC-7052-2 HC70522 ILT Master Board
Humo Laboratory HC-7052-2 HC70522 ILT Master Board
Humo Laboratory HC-7054-2 HC70542 ILT Backplane Board 4CH
Humo Laboratory HC-7054-2 HC70542 ILT Backplane Board 4CH
Humo Laboratory HC-7055-2 T8V-0 TH Board
Humo Laboratory HC-7055-2 T8V-0 TH Board
Humo Laboratory HC-7060-1 HC70601 Display Panel w/ L4044B Board
Humo Laboratory HC-7060-1 HC70601 Display Panel w/ L4044B Board
Humo Laboratory HC-7073 HC7073 Switch Board
Humo Laboratory HC-7073 HC7073 Switch Board
HVRB1 02A03423
HVRB1 02A03423
Hwa Sung SK-2000 SK2000 Display Controller
Hwa Sung SK-2000 SK2000 Display Controller
HY Tech AG 922FS0.8R-A2P-G-L 922FS08RA2PGL Index Track Sensor
HY Tech AG 922FS0.8R-A2P-G-L 922FS08RA2PGL Index Track Sensor
Hybaid PS 250 Electrophoresis Power Supply
Hybaid PS 250 Electrophoresis Power Supply
HYDAC HAD-4744-B-400-031 HAD4744B400031 Pressure Transmitter Made in Germany
HYDAC HAD-4744-B-400-031 HAD4744B400031 Pressure Transmitter Made in Germany
Hydrome DSG-3C60-N-01 DSG3C60N01 Wet Solenoid Operated Directional Controller
Hydrome DSG-3C60-N-01 DSG3C60N01 Wet Solenoid Operated Directional Controller
HY-Sync 23T3FEHH Stepping Motor
HY-Sync 23T3FEHH Stepping Motor