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。

 SKF BEARING ADAPTER SLEEVE SNW 20X3.7/16

  STERLCO ADJUSTABLE TEMPERATURE CONTROL VALVE 140-240 1/2" TYPE 56T

LOT OF (3)    BAKER BUSHING INSERTS 2" TALL 1-1/2" WIDE 0551129

  ASCO 110/120V SOLENOID VALVE 532721 KF8318D49MS

   BIMBA DOUBLE-WALL AIR CYLINDER MOTING KIT MFRS-17

  BANNER DC POWER SUPPLY RELAY PS15-1

   3M C SHRINK SILICRUBBER SKIRTED TERMINATION KIT QT-III

   INGERSOLL-RAND ARO 3" UPPER VALVE DIAPHRAGM V1977

   ROSEDALE PRODUCTS 500PSIG SS VESSEL 4-12-1F-2-150-S316-TSW-N-PB

   EATON SIDE PUSH SPRING RETURN LIMIT SWITCH HEAD E50DS1

   TB WOODS 7/8" KEYED BORE VARIABLE SPEED SHEAVE RC80

 PRECISION 24V 1/8" NPT SOLENOID VALVE B3313

   SQUARE D CIRCUIT BREAKER KHL362001212 200AMP 600VOLT 3POLE

FACTORY  HONEYWELL POWER SUPPLY TK-FPCXX2

   COLUMBUS ELECTRIC .05-12" WC ADJUSTABLE AIR FLOW SWITCH RH3A

   ENGINEERING RESOURCES STEAM MISER 1" NOZZLE SG-B1-04N

 LS INDUSTRIAL SYSTEMS MANUAL MOTOR STARTER MMS-32H

   GARLOCK OIL SEAL KLOSURE J415801 21163-1639

   DEMAG CARRIAGE CLAMP ASSEMBLY 98226044

  TOSHIBA DRIVE BOARD ARNI-915 2N3A2315-C

   GLOBE MOTORS 1 PHASE 115VAC CHOPPER MOTOR 18A108

   ASHCROFT 2-1/2" 760Hg-0-775Hg 1/4" PRESSURE GAUGE 251009AW02L760

  SENSOPART PHOTOELECTRIC PROXIMITY SENSOR 609-11005 FT-25-RLH-PS-M4

REBUILT ASCO 125VDC SOLENOID VALVE HC8321G004

   TSUBAKI 5F11 ROLLER CHAIN 50-3 RIVET 50-3RB

 KEYENCE PHOTOELECTRIC SENSOR CU-21T

   HUBBELL 20/30A TWIST LOCK RECEPTACLE LIFT COVER HBL7425WOA

LOT OF (5)    PERKIN ELMER OPTIPLATE -96F WELLS

   REXNORD 10' TABLETOP CHAIN LF882K7-1/2

  BAUMULLER NURNBERG SERVO DRIVE BUS3-15/30-30-004

 ALLEN-BRADLEY CIRCUIT BOARD 113083 REV06 177869-F34

   ETR MARTIGNY 2.2/2.6kW MOT. 3 ASYNCHR. MOTOR MAF90L2

   SEW-EURODRIVE 23.20 RATIO 1700RPM GEAR MOTOR K37DRS71M4/DH

 TRI-TRONICS US EYE RETRO-RELEX PHOTOELECTRIC SENSOR UR-A

 EATON CUTLER-HAMMER POWER SUPPLY PSS25E

 YASKAWA SERVOPACK SERVO DRIVE SGDH-04AEY336

   GE GENERAL ELECTRIC 125V RED INDICATOR LIGHT CR2940UC213B2

  GE SIZE 1 MAGNETIC STARTER REVERR309C002LAA

 SIEMENS 30A 240V 3-POLE CIRCUIT BREAKER BQ330

   TB WOODS SG 2-1/4" BUSHING SF214

 GENERAL ELECTRIC MFC POWER SUPPLY CARD 531X111PSHAEG2

   INTELLA BLUESPOT 9-96V SAFETY LED LIGHT 01291296

   FESTO QUICK CONNECT ELBOW LCK-1/2-PK-13

   SKF 70MM ID X 90MM OD X 10MM WIDE BALL BEARING 61814-2RZ

 SCHNEIDER ELECTRIC 600VAC 330A CONTACTOR LC1F330

   ATLAS COPCO SERVICE KIT 2906-0109-00

   IFM EFFECTOR PRESSURE SENSOR PN4229 PN-1-1-RBN14-HFBOW/LS

   ANDERSON 1/2" BRONZE RELIEF VALVE 81BM48-4

   INFINEON EUPEC POWER SUPPLY MODULES FZ2400R17HP4_B2

   METRAMATIC KEYPAD DISPLAY OPERATOR INTERFACE ASSEMBLY 6C-02D-0008

  MB NYLA-K BEARING INSERT MSLN-16 1"

 NIVELCO NIVOSWITCH FORK LEVEL SWITCH RCR-406-1

  TEXAS INSTRUMENTS OUTPUT MODULE 305-20T-1

  CKD DC24V HYDRAULIC SOLENOID VALVE CVSE2-25A-05-02HS-3

   WINTERS 200-1000F THERMO-GAUGE TEMPERATURE 11452106

   ABB 2600T PRESSURE TRANSMITTER 266DRHFSSA4A1-N2

 YASKAWA BRAKING IT CDBR-2110B

   SPERRY VICKERS SOLENOID VALVE DGMFN-3-Y-A2W-20

   GENERAL ELECTRIC 230V MACHINE TOOL RELAY CONTACTOR CR2810A-14DE

LOT OF (3)    DODGE SIZE 3-15/16" PILLOW BLOCK SEALS 50TT315

   HONEYWELL BLUE 4-POSITION MAINTAINED SELECTOR SWITCH PTSJK301

   GE GENERAL ELECTRIC 660V 6UF CAPACITOR A26F6623

   CRYDOM 25A 480V PROPORTIONAL CONTROLLER RELAY RPC4825

   DATALOGIC M12 PHOTOELECTRIC SENSOR S51-PR-5-C10-PK

   CISCO 1000 BASE-SX CONNECTOR GLC-SX-MM= 30-1301-02

  LOVEJOY 50 DLT HUB 1-1/4 1/4X1/8 KW 685144 39047

  PARKER SERVO MOTOR MB1053002519164M

 DELTA MICROTUF LS3200 ELECTRONIC LEVEL SENSOR SWITCH LS32NX 200203

  SPAL ENGINE / RADIATOR COOLING FAN VA22-BP11/C-50A 24V

   SYSTEMS ENHANCEMENT 115VAC POWER ADMINISTRATOR PA-800

   GARLOCK KLOZURE OIL SEAL 63X1939 2158-1939

   NACHI SINGLE ROW BALL BEARING 6304NSL

  FISHER PRESSURE REGULATOR 67CFR-206

   EATON CUTLER-HAMMER 50V INDUCTIVE PROXIMITY SENSOR E57LAL12T111E

   ENDRESS  HAUSER ELECTRONIC INSERT WFO0244 45 RFI

   BANNER 30V FIBER AMPLIFIER DF-G1-NS-Q5 19353

   SCHNEIDER ELECTRIC RED ILLUMINATED LENS IT XVEC34

  HEUFT 70MA 10-30VDC ENCODER HPE700018-M13-10.02

   WESTINGHOUSE 440/480V COIL 504C876G13

   FALK STEELFLEX COVER 1070T20

   WESTINGHOUSE SEMICONDUCTOR DIODE 1N3170

   KACE 1" BALL VALVE PN-125 2000 PSI 316 SS WCB RTFE DN25-1"

   SCHMERSAL 4A 230V SAFETY INTERLOCK SWITCH AZ-16-12ZVRK-M20

1     SCHMERSAL 4A 230V SAFETY INTERLOCK SWITCH AZ-16-12ZVRK-M20

   SQUARE D 120V COIL S1861-S1-R29B / S1861S1R29B

GUARATNEED NORGREN PS RX(1-3/4) 2X3-1/2 PNEUMATIC CYLINDER EJ0355A1

  RADISYS SERCOS CONTROL BOARD EXM-15 61-0115-01

   FACTS INC RELAY CIRCUIT BOARD C-A22.00-5

   FIREYE 48PT1 FIRETRON CELL PHOTOELECTRIC SENSOR 4-128-1

   HONEYWELL MICROSWITCH PANEL TOGGLE SWITCH 6AT1

   DODGE SPHERICAL ROLLER BEARING SEAL KIT 34TTDN303 / 039858

NOS BERTH TECHNOLOGIES LEVEL SWITCH TRANSMITTER LB 4401-03-OR-GD-Z

 MIL-SPEC WESTWORD CORP ELECTROMAGNETIC RELAY 5945-00-855-4284 1002-40

   ICM 115V 60 SEC DELAY RELAY BMS115A1X60 MES115A1X60

 FANUC CONTROL OPTION IT A03B-0403-C020

 IVERSAL FLOW MONITORS FLOW SWITCH 1/2"NPT 0-3GPM SN-BSB3GM-4-32V1.0-AX0XR

   I 10' ROLLER CHAIN 34LF880K325 / LF880-K325

   JOHNSON CONTROLS 90/325°F TEMPERATURE CONTROLLER A19ADC-37C

   NAPA G OIL FILTER 1049

 D-M-E HYDRAULIC LOCKING CORE PULL HLCP300-2000

  ENDRESS  HAUSER PROMASS 83 FLOW TRANSMITER 83S50-AFTMAAADBAA5

 PETER PAUL 120V 1/4" NPT SOLENOID VALVE 23JK9BGV

 EATON 10A 1 POLE CIRCUIT BREAKER FAZ-C10/1

   NSK BALL SCREW BEARING 15T1-0026 W2004FA-1P-C5Z

  ZANDER FILTER REPLACEMENT ELEMENT -XP3

  SMC MANUAL DIRECTIONAL CONTROL HAND VALVE NVH302

   OMEGA M12 14" X 1/4 THERMOCOUPLE M12KIN-1/4-U-14-A

   SPRAYMATION 7/16" GLUE G PLGER 401222

   DOMINO EHT SENSOR 3M ASSEMBLY 36836SP

  FANUC CIRCUIT BOARD A16B-2203-011

 ALLEN-BRADLEY AC DRIVE REPLACEMENT BOARD SER.A 20BD034A3AYNANB0

   IFM 30VDC FIBER OPTIC REFLECTION SENSOR FT-50-V-V-M5/16-E20822

  SIEMENS 3-BUTTON PLASTIC ENCLOSURE 3SU1803-0AA00-0AB1

 MAC 120/24V SOLENOID VALVE 257B-111CC

 GE GENERAL ELECTRIC 5A 277/480V 3-POLE CIRCUIT BREAKER EP103UL-C5

 PB/WOOD ELECTRIC 20A 250V PLUG-IN CIRCUIT BREAKER 375-220-101

   GIC THERMODYNAMICS THERMO COUPLE TBL3S4125JG0A

 SIEMENS SIMATIC S7 OUTPUT MODULE 6ES7-132-4BB31-0AA0

  ASCO 120V 1/4" 3-WAY SOLENOID VALVE EF8345G1

1    ASCO 120V 1/4" 3-WAY SOLENOID VALVE EF8345G1

   IDEC 120V AMBER PANEL MOT INDICATOR LIGHT APW299D-A-120V

 PGI INTERNATIONAL 3 WAY MANIF VALVE M-750SCT

   ALLEN-BRADLEY SER.A 18" SHAFT KIT 1494R-N4

   PARKER 120V SOLENOID PILOT LATCH PS3441C53P

   KKLE VALVE 1/2" PVCN SAFETY RELIFE VALVE 6010DCM01-KM-0110

 DODGE 7 POLY DISC COUPLING DISC 008034

   YALE COIL WIRE YT505960585

 EATON 250V 6W STACKLIGHT E26

   DODGE TIGEAR 2 5:1 2.59HP 1750RPM GEAR REDUCER 17Q05LR14

  ABB LINEAR CURRENT TRANSDUCER SAFW-400 57413077

   HONEYWELL MICRO-SWITCH LIMIT SWITCH BA-2RB-A2

   JAMESBURY 1/4" SS BALL VALVE 9FB-T6-3600-XTB-61