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。

FOXBORO 2AXA4-R BOARD RESET PROPORTINAL INTERNAL EXTERNAL SUMMING

Foxboro 2AXA5ST Controller Card

FOXBORO 2AXA5ST PID CONTROL BOARD (REPAIRED)

FOXBORO 2AX-A9 CONTROL CARD

FOXBORO 2AX-ALM-BR ALARM MODULE CARD

FOXBORO 2AXDYC-L CARD DYNAMIC COMPENSATOR

Foxboro 2AXN4 Pcb Circuit Board

Foxboro 2AXSBF Signal Buffer Pcb Circuit Board

FOXBORO 2AX-VLM BOARD

Foxboro 2DC-K Pcb Circuit Board

Foxboro 2DC-KR Control Board Pcb

Foxboro 3A2-D2I Dual Current Out Pcb Circuit Board

Foxboro 3A2-D3I Converter Module Pcb Circuit Board

Foxboro 3A2-D3VB Converter Board Pcb

Foxboro 3A2-F2D Pcb Circuit Board

Foxboro 3A2-I2D Converter Pcb Circuit Board

Foxboro 3A2-I3D Converter Pcb Circuit Board

Foxboro 3A2-M2DKK Mv/d Converter Pcb Circuit Board

Foxboro 3A2-Q2D Pcb Circuit Board

Foxboro 3A4-I2DA Module Pcb Circuit Board

Foxboro 3AD-I3IA Controller Card

Foxboro 3C4-D2KSB Invensys D/sws Converter Pcb Circuit Board

Foxboro 3C8-C3D Controller Pcb Circuit Board

Foxboro 3C8-E2D Pcb Circuit Board

Foxboro AD-8813 Output Amplifer Board 1ph 120v-ac

Foxboro B0131MJ Pcb Circuit Board

Foxboro B0132CM-B Pcb Circuit Board

Foxboro B0132CS-EC Pcb Circuit Board

Foxboro B0132RK-D Pcb Circuit Board

Foxboro B0132UE-G B0131xu Pcb Circuit Board

Foxboro B0132UE-H Pcb Circuit Board

Foxboro B0132UH B0132UG-D Pcb Circuit Board

Foxboro B0133LA B0133SA-D Pcb Circuit Board

Foxboro B0133LA B0133SA-E Pcb Circuit Board

Foxboro B0133LN I/o Converter Board

Foxboro B0133LP Pcb Circuit Board

Foxboro B0133SA-D Pcb Circuit Board

Foxboro B0133SU-D B0133LU Pcb Circuit Board

Foxboro B0133UC-C Pcb Circuit Board

Foxboro B0134ZT B0133ST-D Pcb Circuit Board

Foxboro B0136HL 2DC-J Pcb Circuit Board

Foxboro B0136HL-G Analog Control Card

Foxboro B0142CB F0109AB-F Pcb Circuit Board

Foxboro B0142CC F0109BV-H Pcb Circuit Board

Foxboro B0142DR Pcb Circuit Board

Foxboro B0142DR1B Invensys Power Conversion Pcb Circuit Board

Foxboro B4016XZ Circuit Board Assembly

Foxboro BCOM17 P0914QG Invensys I/a Series Dcs Integrator Board Rev 0f

Foxboro C0153FBA 2MD-855 Multi Div Pcb Circuit Board

Foxboro C0162BR-A Pcb Circuit Board

FOXBORO CONTROL BOARD MODULE 2AXRPG

FOXBORO CONVERTER BOARD N0138NC

Foxboro CS-N/SRC N-2AI-I2V Current To Voltage Converter Board

Foxboro CS-N/SRC N-2AI-T2VKK Temperature Controller Board 0-2300f

Foxboro D0137AE D0137CE-C Pcb Circuit Board

Foxboro D0137AE-CA Pcb Circuit Board

Foxboro D0137CE-B Pcb Circuit Board

Foxboro D0137CS-A D0137AS Pcb Circuit Board

Foxboro D0139BF-A D0139BG 2B8306 76R06 Pcb Circuit Board

Foxboro D0140AA D0140BA-B Pcb Circuit Board

Foxboro D0140AU D0140BJ-C Programming Panel Board

Foxboro D0140AY F0107KF-F Memory Pcb Circuit Board

Foxboro D0140BD-B Pcb Circuit Board

Foxboro D0140JA D0140KA-B Pcb Circuit Board

Foxboro D0140JB-E D0140KB-C Pcb Circuit Board

Foxboro D0140JF L0113XQ-A Pcb Circuit Board

Foxboro D0140JF-B L0113XQ-01 Panel Interface Board

Foxboro D0140JY Pcb Circuit Board Rev E

Foxboro D0140KB-C Pcb Circuit Board

Foxboro D0140KN D0137CS-A Pcb Circuit Board

Foxboro D0140KN-C D0137CS-A Pcb Circuit Board

Foxboro D0140YF Bus Buffer Board

Foxboro D0140ZA-A D0140ZB-B Pcb Circuit Board

Foxboro D0140ZD-A D0140AE-G Control Circuit Board Pcb

Foxboro D0140ZK-C Programming Panel Board

Foxboro D0147KB C0162BB-A Control Circuit Board Pcb

Foxboro D0147KW C0162BA-A Pcb Circuit Board Rev C

Foxboro D0147KX C0162BE-02 Pcb Circuit Board Rev B

Foxboro D0147KX C0162BE-A Pcb Circuit Board Rev B

Foxboro D3001BQ K017e Rev Dc Pcb Circuit Board

Foxboro D3001DE Control Card Rev B

Foxboro D3001DX K08tb Rev Bc Pcb Circuit Board

Foxboro D3001EH K111d Rev 21bb Pcb Circuit Board

Foxboro D3001FP K022e Rev Bf Pcb Circuit Board

Foxboro D3001RS-BB F072e 756 Pcb Circuit Board

Foxboro D3001SR F8150e Rev Gj Pcb Circuit Board

Foxboro D3001YL F034b Rev A Pcb Circuit Board

Foxboro D3001YQ Rev A Pcb Circuit Board

Foxboro D3001YR Rec Dc Pcb Circuit Board

Foxboro D3001YR Rev E Pcb Circuit Board

Foxboro D3001YR Rev Ec Pcb Circuit Board

Foxboro D3001YS Rev F Pcb Circuit Board

Foxboro D3001YS Rev Fd Pcb Circuit Board

Foxboro D3001YT Rev B Pcb Circuit Board

Foxboro D3001YT Rev Bb Pcb Circuit Board

Foxboro D30041YL D3004yln Rev Aa Pcb Circuit Board

FOXBORO DIGIB 50000178 P0912SF REV.C SERIAL INTERFACE CARD

Foxboro Ecep-8194 St1-00487 Level Shifter Pcb Circuit Board

Foxboro F0106JR Rev A Pcb Circuit Board

Foxboro F0106KE-E D0139NT-E Pcb Circuit Board

Foxboro F0109AB-C Pcb Circuit Board

Foxboro F0109AC-B Buffer Board

Foxboro F0109AE-B B0142CE Pcb Circuit Board

Foxboro F0109BQ-C Power Converter Pcb Circuit Board

Foxboro F0109BX-C B0142CEH Pcb Circuit Board

Foxboro F0109BX-C B0142CEHB Pcb Circuit Board

Foxboro F0109BX-D F8628D Pcb Circuit Board

FOXBORO F8917AD CIRCUIT BOARD M0156AEJ

Foxboro FWSKB2 D0140KK-B Pcb Circuit Board

Foxboro G0113DZ F0109AL-A F0109AM-A Pcb Circuit Board

Foxboro H2-8178 3010-0106 Hv Power Supply Pcb Circuit Board Rev B

Foxboro K0143CA-A Pcb Circuit Board

Foxboro K0143DX-B Pcb Circuit Board Rev B

Foxboro KIT-C-E27-A-C Card Field Conversion Kit

Foxboro L0111KS-A Control Board Pcb

Foxboro L0111KW-A Pcb Circuit Board

Foxboro L0111KY-B Control Board Pcb Circuit Board

Foxboro L0111KZ-D L0111KY-B Memory Control Board

Foxboro L0111US Pcb Circuit Board Rev B

Foxboro L0111UT Pcb Circuit Board Rev A

Foxboro L0111UU Control Board Pcb Circuit Board Rev A

Foxboro L0113CN Pcb Circuit Board Rev B

Foxboro L0113XE D0140ZB-B Pcb Circuit Board Rev B

Foxboro L0113ZN B0133SH-C Pcb Circuit Board

Foxboro L0117AN Display Screen Board

Foxboro L0118RA-1 Pcb Circuit Board

Foxboro L0118UG B0141YK-A Pcb Circuit Board

Foxboro L0118UH B0141YL-01 Pcb Circuit Board

Foxboro L0118WF B0133SH-D Pcb Circuit Board

Foxboro L0118WG B0133SH-D Pcb Circuit Board

Foxboro L0119SJ Control Pcb Circuit Board Rev B

Foxboro L0119TR Pcb Circuit Board Rev A

Foxboro L0119UX C0162BE-A Pcb Circuit Board Rev A

Foxboro L0120LA L0117YF-A Pcb Circuit Board

Foxboro L0120WT-K L0120WW-0D Pcb Circuit Board

Foxboro L0122f Pcb Circuit Boardu Rev C

FOXBORO LOGIC CARD 2AX-DFA

Foxboro ML2F80P-22 N0810FF Pcb Circuit Board

Foxboro ML2F80P-22 N0810FZ Pcb Circuit Board

Foxboro ML2F80P-22 N0811QQ-E Pcb Circuit Board

Foxboro ML2F80P-22 N0811RLBE Pcb Circuit Board

Foxboro ML2F80P-22 N0811RNBD Pcb Circuit Board

Foxboro ML2F80P-22 N0812AAAD Pcb Circuit Board

Foxboro MS-F6101A Pcb Circuit Board

Foxboro MS-F6101B Pcb Circuit Board St. A

Foxboro MS-F6111B Control Circuit Board Pcb

Foxboro MS-FWSKB2 D0140KK-B Pcb Circuit Board St A

Foxboro N0300FZ Card Holder Module

Foxboro N0309PM 2AC-M2 Dual Control Card Holder Module

Foxboro N0310QY Card Holder Module

Foxboro N0310WJ Card Holder Module

Foxboro N0310WW Card Holder Module

Foxboro N0810F2-JD Pcb Circuit Board

Foxboro N0810ZBKF Pcb Circuit Board

Foxboro N0810ZNBA Pcb Circuit Board

Foxboro N0811QTEB N0811QS-F Pcb Circuit Board

Foxboro N0811RREB Pcb Circuit Board

Foxboro P0122JBT Pcb Circuit Board

Foxboro P0122MA-K Pcb Circuit Board

Foxboro P0122MB-M Pcb Circuit Board

FOXBORO P0900LU INTERFACE PROCESS CONTROL BOARD

Foxboro P0903VJ Pwa Smi Pcb Circuit Board

Foxboro P0903VK-0B P0903VJ Pcb Circuit Board

Foxboro P0914QG Invensys Dcs Integrator Bcom17 Rev 0f I/a Series Pcb

Foxboro P0914QG Invensys I/a Series Dcs Integrator Bcom17 Pcb Circuit Board

Foxboro P0914QN Invensys I/a Series Dcs Integrator Baso37 Pcb Circuit Board

Foxboro P0914RN-0A Invensys I/a Series Bdsi07 Dcs Integrator Pcb Circuit Board

Foxboro P0914SD B 09 I/a Series Dcs Integrator Board Rev 0a

Foxboro P0914SD Invensys I/a Series Dcs Integrator B 09 Pcb Circuit Board

Foxboro P0914SK Invensys I/a Series Dcs Integrator Bfbi Pcb Circuit Board

Foxboro PH10-3N2A-2 Dolphin Series Ph Sensor

Foxboro SS600CG Monitor Pcb Circuit Board

Fps S911-201.2X Pcb Circuit Board Rev 2

FRAMATOME AN AMPLIFIER BOARD 707790-1051

FRAMATOME AN AMPLIFIER BOARD 707790-1051 A

Free returns