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。

GENERIC 121062B PC BOARD W/MULTIPLE COMPONENTS

GENERIC 134193Y CIRCUIT BOARD

GENERIC 15428-1 PCB

GENERIC 16531 PC BOARD ASSEMBLY

GENERIC 20-104 PC BOARD W/TERMINAL STRIP

GENERIC 2AC-A PC BOARD

GENERIC 300-364 BOARD

GENERIC 3885 REV F PC BOARD

GENERIC 6-CZ019 PC CONTROL BOARD

Generic Automation ETRKR-G Terminal Pcb Circuit Board

GENERIC E500FA DIGITAL PROCESSOR PC BOARD (REPAIRED)

Georg Fischer 198-840-143 Paddlewheel Flow Sensor

Georg Fischer 3-2537-6C-P0 Paddlewheel Flow Sensor

Georg Fischer Gf 198-840-037 Stainless Hot Tap Flow Sensor 1-1/2in

Geotech 990-40507-01-04 Pcb Circuit Board Rev D

Geotech 990-41071-0102 Digital Input Pcb Circuit Board Rev B

Geotech 990-41363-0102 Digital Output Pcb Circuit Board Rev C

Geotech 990-42174-0107 Pcb Circuit Board Rev G

Geotech 990-42872-0101 Pcb Circuit Board Rev G

Geotech 990-42874-0101 Pcb Circuit Board Rev B

Geotech 990-44031-0101 Pcb Circuit Board Rev B

Geotech 990-52624-0101 Pcb Circuit Board

Geotech 990-55044-01 Pcb Circuit Board Rev A

Geotest Introduces the GX7404 Power Interface Prototyping Board P/n:255200

Geotest the GX7404 Power Interface Prototyping Board P/n:255200 Rev:A

GETTYS 11-0063-950 CIRCUIT BOARD

GETTYS 11-0090-60 PC BOARD

GETTYS 11-0092-41 PC BOARD

GETTYS 11-0114-01 PC BOARD

GETTYS 11-0116-00 PC BOARD

GETTYS 11-0123-01 PC BOARD

GETTYS 14-0038-03 PC BOARD

GETTYS 44-0035-00 PC BOARD

GETTYS 550050-00 CIRCUIT BOARD

GETTYS 55-0055-00 PC BOARD

GETTYS 700-0014-00 MOTHER BOARD

GETTYS CIRCUIT BOARD 110062102

Gf Signet 198 840 143 3-2536-P0 Paddlewheel Flow Sensor

GIDDINGS & LEWIS 501-04708-00 EXECUTIVE CONTROL BOARD

GILCO 83007 POWER SWITCH BOARD

GILCO ENGINEERING 84012A BOARD

Gilco Engineering 930630-01 Lamp Driver Pcb Board

Gilco Engineering MS-87-013A Power Supply Pcb Circuit Board

Gildemeister Control Card,DPK AES 0,DPKAES0

Gildemeister Memory Board,SET-10 AES 0,SET10AES0.0.860.705-46.3 SET

Gildemeister Platine 0.652.629-89.0 MPB Aes 1 Circuit Board Control IN0853008

Ginova 93.000.108 P.2914.01 Rev 01 Pcb Circuit Board

Ginova 93.8000.109/01 P.2914.02 Pcb Circuit Board

Ginova 93.8000.109/11 P.2914.02  Pcb Circuit Board

Ginova P.2914.01 Rev D Pcb Circuit Board

Ginova P2914.02 Pcb Circuit Board

Glen Control B-105D Pcb Circuit Board

Glen Control B-106 Power Supply Pcb Circuit Board Rev B

Glen Control B-116 Pcb Circuit Board Rev C

GLOUCESTER D40074101 REV.D COMMUNICATION BOARD

GLOUCESTER ENG C133-714A-96P 250V BOARD

GLOUCESTER ENGINEERING BD REV. C DIGITAL OUTPUT BOARD

GLUNZ & JENSEN 10015931 PCB BOARD

GLUNZ & JENSEN 10019350 CIRCUIT BOARD

GLUNZ & JENSEN 10035096 PROCESSOR BOARD

GLUNZ & JENSEN 10039871 CIRCUIT BOARD

gm-automation (4,705) 100%

Gmf Robotics / Fanuc Input Card A03B-0801-C423 Input Module Card ID16D ID16

Gmf Robotics/FANUC Kontrollkarte A03B-0801-C462 Control Module Card RC01C RC01

GORDOS ARKANSAS PB-24SM MOUNTING BOARD

GORDOS PB-24 BOARD

GORING KERR TK7902 SEARCH HEAD BOARD

GORING KERT7905 ISSUE 5 POWER SUPPLY2 BOARD

GORING KERT7905 ISSUE 6 POWER SUPPLY2 BOARD

GORING KERT7906 ISSUE 3 R.F. AMPLIFIER BOARD

GORING KERT8906 ISSUE 3 AMPLIFIER CARD

GOSS 1C122819 REV.0 CPU BOARD

GOSS E13301-1 REV.12 CPU BOARD

GOSS E13301-1 REV.14 CPU BOARD

GOSS E13844-1 CONTROL BOARD

GOSS E15356-2 BOARD

GOSS E17368-1 CONTROL BOARD

GOULD 11-0161-103 BOARD

Gould 168-103527-001 Pcb Circuit Board Rev 0

GOULD 521P-006 PC BOARD

GOULD AS-C516-000 PC BOARD

Gould AS-S210-010 Pcb Circuit Board Rev B14

Gould AS-S210-030 Pcb Circuit Board Rev B16

Graco 249179 Flow Control Board Pcb

Graco 9935 244666 Pcb Circuit Board

GRAHAM 1899-E CIRCUIT BOARD

GRAPHIC PRINTING BOARD/PANEL DYSPLAY G30752A-01-01

GRAPHTEC TYPE KC AKC3101 CARD MODULE

GRECON 2036-07-07 CIRCUIT BOARD (AS PICTURED)

GRECON 2036-08-03-BAU PC BOARD

GRECON LC73 581708 CIRCUIT BOARD

Greenlee 5038311.6 Textron I/o Computer Control Board

GREENSPRING COMPUTERS, INC. PC BOARD 0340-1148A

GREMSER PCB-FE 88 3.65-0000 BS 0125

GROSSENBACHER GR1-2 BOARD 4331-50902

GS131 Pcb Circuit Board Rev 1.0

GSE INC. BOARD PC816B (AS PICTURED)

GSE PC745H-40-20-25518 CIRCUIT BOARD CARD

Gte FB206971A Pcb Circuit Board

Gte FB207251A Pcb Circuit Board

Gte FB-20779 FB20779A Pcb Circuit Board

Gte FB-20779-1 FB207791A Pcb Circuit Board

Guaranteed by Sat, Jun. 8

GUARDSCAN PC BOARD 20952

GULF ATLAN NAR2H TIMER PC BOARD

Gullco GK-191-P-226 Pcb Circuit Board Rev 7

Gutor 0P0010 21411-5 Pcb Circuit Board

Gutor 0P0530-A076 Communication Interface Board Rev 01

Gutor 0P2408A Op2408a Pcb Circuit Board

Gutor 0P6230 Pcb Circuit Board Rev 09

Gutor 0P9897 Pcb Circuit Board

Gutor 0P9900-002 Pcb Circuit Board

Gutor 0P9904 Pcb Circuit Board

Gutor 0P9907 External Connection Pcb Circuit Board

Gutor 21137-4 Pcb Circuit Board

H6148-01 BOARD ONLY

Haas Automation 65-1080W Pcb Circuit Board Rev A

Haas Automation 93-1067L Pcb Circuit Board Rev A

Haas Automation VSBC-32 18-06-95-00 Pcb Circuit Board

HACH 17962 CHEMICAL BOARD

Hach 19126 FS19125-3 Pcb Circuit Board

Hach 19126 FS19125-C Pcb Circuit Board

Hach 44122-00 Powr Supply Pcb Circuit Board

Hach 44978-00 Chiller Control Pcb Board

HACH 46812-01 CONTROL BOARD

Hach 47604-00 Pcb Circuit Board Rev C

Hach 47604-10 Series 5000 Mpu Circuit Board

Hach Chemical 13572 Pcb Circuit Board

Hach Chemical 13576 Pcb Circuit Board

Hach CS19507-F Pcb Circuit Board

Hach CS9757 Pcb Circuit Board Rev P

Hagan 378252 Amplifier Pcb Circuit Board Rev H

Hagan 398694-2 Pcb Circuit Board

Hagan 398782-2-B-003 Pcb Circuit Board Rev L

HAGGLUNDS DENISON 037-85609-0 PC BOARD

Hagglunds Denison S20-11712 Jupiter 500 Driver Card Pcb

Hagglunds Denison S20-11715 Drive Board

Hagiwara C-7704-1430B CMT80 Pcb Circuit Board

Hagiwara C-7704-1620D DI880 Pcb Circuit Board

Hagiwara C-7704-1630B DIP380CX Pcb Circuit Board

Hagiwara C-7704-1720C D0880 Output Interface Board

Hagiwara C-8335-4731-2 DOP680X Pcb Circuit Board

HAIVISION 083P004-001GL CIRCUIT BOARD

HALAND SIMON H2668M5009 ISSUSE 9 CIRCUIT BOARD  NOX BOX

HALLIBURTON 99143179 FLOW ANALYZER BOARD

Hamilton 242428 Polilyte Plus Vp 120 Ph Sensor

Hammond BT1100 Pcb Circuit Board

HANSEN LBS ENCLOSURED BOARD 30" PROBE 115V (AS PICTURED)

HARDMEIER DC1Q30/5-Z BOARD

Hardy 0193A Pcb Circuit Board Rev A

Hardy 0342 Pcb Circuit Board Rev B

Hardy 0342 Pcb Circuit Board Rev B-2

Hardy 0534-0235 Pcb Circuit Board Rev B

Hardy 0535 Pcb Circuit Board Rev B

Hardy 0535-0465-07 Pcb Circuit Board Rev A

Hardy 2295A03-881 Pcb Circuit Board

Hardy C05-2255 Mib Pcb Circuit Board Rev B

HARDY INSTRUMENTS PWA-RELAY HI2150WC BOARD

HARDY PWA0535-0445-03 BOARD

HARLAND CTR-101 CIRCUIT BOARD

HARLAND H4890P1201 ISSUE6 CIRCUIT BOARD

HARLAND H4890P1297 ISSUE6 CIRCUIT BOARD

HARLAND H4890P1333 CIRCUIT BOARD

HARLAND H4890P1358 ISSUE2 CIRCUIT BOARD

HARLAND H4890P1438 CIRCUIT BOARD

HARLAND H4890P1456 ISSUE1 CIRCUIT BOARD

HARLAND H4890P5001 ISSUE13 CIRUCIT BOARD

HARLAND H4890P5007 ISSUE6 CIRCUIT BOARD

HARLAND HS48901201A CIRCUIT BOARD

HARLAND SIMEN A00176P032 CIRCUIT BOARD

HARLAND SIMEN H2668M1239 ISSUE 6 CIRCUIT BOARD

HARLAND SIMEN H2668M1466 ISSUE 1 CIRCUIT BOARD

HARLAND SIMEN H2668M1510 ISSUE 1 CIRCUIT BOARD

HARLAND SIMEN H2668M5005 ISSUE 8 CIRCUIT BOARD

HARLAND SIMEN H4890P1200 ISSUE 6 CIRCUIT BOARD

HARLAND SIMEN H4890P1359 ISSUE 2 CIRCUIT BOARD