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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。

SOR 6AH-AF2-N1-C1A Pressure Switch

Allen-Bradley 872C-D4CP12-D4 PROXIMITY SWITCH

Hills-Mccanna 500A Valve

ASCO EFHC8210D14 SOLENOID VALVE

GE Ventostat T8002-ACD CO2 Ventilation Control

Regent Relay Multipole Interfacer120 120Vac

Allen-Bradley 849-ZOD321 Pneumatic Timing Relay

Allen-Bradley Timing Relay 700-PK400A1 700-PT

Namco EA040-41100 Limit Switch

Allen-Bradley 700-P800A1 SER B HEAVY DUTY RELAY

MTR

Wilkerson FR1020 Signal Alarm

Replacement Components 35Bb-900-722 Amplifier Tee

Automation Direct D4-08TA Module-

EAGLE SIGNAL BR15A6 3H76 TIMER

Dynisco PT435A-1.5M-10/18 Pressure Transducer

Westinghouse Time Delay BT022F

Computer Conversions Corp. Main Frame Board RTSS-4

Static Control Systems Interface Digital Display 1180-P4-03-128-X

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Agastat 7012AB Timer

Bussmann JCW-5E FUSE

IFM Efector IGA2008-ABOA SENSOR IG0307

Mottori Elettrici Servo Motor CC MP55.10 3000RPM 24V 150W

Fuji BU-FSB2015 Circuit Breaker with Lugs

Allen-Bradley 700S-DCP620Z24 SERIES E CONTROL RELAY

Lambda Power Supply LUS-10A-15 Max DC 3.4 A

Vektek 56-0005-04 Pallet Module

Shippers 163055 Fastfill Inflator Kit

MINARIK ELECTRIC RG100UCSPEC0254 DC DRIVE

Habasit ST610-30 Flat Top Belt for Raw Food

Thayer Scales A-61378B Module

GURLEY ENCODER 1137S02048Q5L01C18SQ02EN

ATC Timer 376A-100-R-50RX

Gardner Denver 00519100-0009 Discharge Temperature Gauge for Air Compressor

AUTOMATION DIRECT D4-16TR MODULE

Leuze Safety Relay MSI-SX/RX Lumiflex

Siemens Sitor PC Board 6PA1000-1BC NICE

SOR 15S-A2-M2-C1A Differential Pressure Switch

SMC MXS20TN-10ASR Pneumatic Slide Table

Omron CQM1H-CPU21 Programmable Controller-

1  Omron CQM1H-CPU21 Programmable Controller-

Mercoid DA-34-1278-3A Filled Pressure Switch

Helicoid F1C1E9A1H0000 High Acuracy Pressure Gauge

Allen-Bradley Cluster Pilot Light 800T-PC416BAGA

Square D Pneumatic Timing Relay 120 V Coil 9050-BO26D

NETSTAL 110.240.7945 PC BOARD

ABB 1SAF900100R3000 WSIX100-B50N PLC Wireless Commications Module

Rexroth Directional Spool Valve R978908810

Fanuc Discharge Resistor Assembly A06B-6105-C901

1 INDEX WERKE GL4902.0600 PC BOARD

Cutler-Hammer 6-43-6 Replacement Contact Kit 3 Pole Citation A10E C10E Contactor

IFM EfectorELECTRONIC PN4222 PRESSURE SENSOR

Schneider Electric Drive Interface VW3A58101

CROUSE HINDS LIGHT FIXTURE VMVM175/MT

Allen-Bradley Size 3 Contactor 500F-DOD920 2P 90A

1 imation D918A9 Rev E PC Board

Athena Temperature Controller 6000F-E1

Watlow 945A-1BB1-B000 Temperature Control

Reliance Electric 0-52861 Module Gate Driver

ASHCROFT LPSN4GS25-XC4FMG8 PRESSURE SWITCH-

Taylor ABB EU7212J017 200-950 Degree F Thermometer

Beckhoff EP3204-0002 Ethercat

Beckhoff E2338-1002 Ethercat

Baumer MY COM L75P/500/L 10228876 24-36VDC Precision Proximity Switch

Crouzet 81505110 VACUOSTAT Adjustable Vacuum Switch

SOR 6AG-AG3-N4-C2A-12-100 Pressure Switch

1 Rosemot 01151-0011-0042 DP/GP TRANSMITTER

1 BARBER COLMAN 5653-06954-33A-0-00 TEMPERATURE CONTROLLER

EMC CPU Display Board D-9570

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Siemens Circuit Breaker 35A ED63B035 3P 18Ka LD LUG

ATC Economical DC Photoelectric Switch 7643AR04N22NX

Adept Technology 10300-46600 Rev G Controller Board

Allen-Bradley Coter Predetermined 60-1716

Festo JMVH-5-1/4-BVI Solenoid Valve

Baldor MA7A MOTOR CONTROL 3 PHASE 8 AMP

1 JUMO 00927750 010 05 29 0022 00055691 THERMOCOUPLE

Festo DSNU-32-10-P-A-K3-KP Pneumatic Rotary Actuator

IFM EfectorLK0264A-A-00KQPKG/US-LK7022 Continuous Level Sensor

Allen-Bradley 1771-OF03 Output Module

Bussmann 350A Fuse LPS-RK-350-SP

Siemens U-20T MODULE-

1 FUSION UV 075342 75342 RF-2 RF DETECTOR

Lanco Contacts C436LC Contact Kit

Digitan Systems DS336-450 PC Board

Fairchild 25442 Air Regulator / Reversing Relay

G.W. Dahl P200  P11 Current Transducer

Square D 9037-HG35 Level/Float Switch Assembly

1  Square D 9037-HG35 Level/Float Switch Assembly

Welding Technologies U81-T10A Timer it

1 HAMAMATSU 935 PHOTOMULTIPLIER TUBE

MENCOM OUTLET DP-RJ45-R-32

Numatics 081SS600M000061 Solenoid Valve

GE SEDA36AT0100 Circuit Breaker

308175-002D1C ALARM CONTROL BOARD

Balluff BNS-519-D04-R12-100-10-FD Switch

1 Reliance ELECTRIC 0-51811-1 VOLTMETER TESTER CARD

444-7-3 PC BOARD

GE Circuit Breaker 60A TEI345C060

Cutler-Hammer E57Fal18T111Sd Proximity Sensor

Encoder Products Encoder 260XN 260-N-R-11-5-0720-R-HV-1-SMK-FB-2-N

ATHENA 4000-B-F-E-23-55 TEMPERATURE CONTROL

FANUC DISCHARGE IT REGENERATIVE A06B-6050-H050

CROUZET COTER 87 620 113

Square D Pressure Switch 9012-ACW10

Allen-Bradley Incremental Encoder 845N-SJHN4-CNY2

Bussmann SPP-7K900 900AMP 700V Fuse

Phoenix Contact MCR-C-U/U-DC Isolating Amplifier

1 Allen-Bradley 1771-OJ PULSE OUTPUT EXPANDER MODULE

1 INDUSTRIAL DYNAMICS 12773 TAKEAWAY MOTOR CONTROLLER

Balluff BES-516-300S76-2 Proximity Switch

GEMS SENSORS 139199 LIQUID FLOW SWITCH

Allen-Bradley 800H-DP6B Hazardous Location Pushbutton

Leeds  Northrup PreAmplifier Recorder 445859 12 Pin

Wika / 3D Instruments 25544-33B51 High Accuracy Pressure Gauge

1 Square D PF4007C CAPACITOR

Mallory Transducer VSB110-2 CHIRP

Westinghouse JA3100S 100 AMP Circuit Breaker

ASCO Hc8345E011M0 Hc8345E011Mo Solenoid Valve

Control-O-Mation D6032.HF Stepper Control

Siemens 3RM1001-2AA04 24VDC 0.1-0.5A Motor Starter

Allen-Bradley 800MS24NX2Q Selector Switch

Square D 8536SBG2V02Sx11 Starter

Moore Signal Conditioner Isolator Converter SCX/4-20MA/4-20MA/5 .5VLP-FA

MIGRATRON TSR-3 SENSOR

Omron E5EN-R3HBT-N Temperature Controller

Balluff BES 516-324-E0-C-10 Inductive sensor

PERMA-CAL 121TID01A21 GAUGE

ASCO 302672 Solenoid Valve Rebuild Kit

Thermo Orion 209589-A01 Sodium Analyzer Board