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

 INGERSOLL RAND ARO 640057 DRUM ONLY

 INGERSOLL RAND F108IGE FILTER ELEMENT KIT 85569168

Ingersoll Rand HG2-GTKA-RP64 Tune Up Kit

Ingersoll Rand Pilot Air Valve 3-Way 2-Position 4YTF1 M252PS-G

  INGERSOLL-RAND BMDS-2 TOOL BALANCER-RETRACTOR 2.2-5.5 LBS.

Inland Truck Parts ITP TRK-3234 Fuller Eaton Transmission Rebuild Kit

Inner Tube 18x6.50/7.50/8.50/9.50-8 20x8.00/10.00-8

Innogaz Electrofusion Fitting PE3408/PE4710 2 IPS x 1/2 CTS

 INPRO BI03064A SEAL BEARING ISOLATOR

 INPRO SEAL 1718-A-21821-5 BEARING ISOLATOR

 INPRO/SEAL 1787-A-00381-0 BEARING ISOLATOR 2.375" ID - 3.500" OD

 INPRO/SEAL 1900A-P0041-0 BEARING ISOLATOR 1.438 ID 2.250 OD

 INPRO/SEAL 1900-A-P0046-0 BEARING ISOLATOR 1.937 SHAFT 3" BORE

 INPRO/SEAL 7200-TR-15452-0 BEARING ISOLATOR 2.437ID 3.437 OD

 INPRO/SEAL 9901-A-23842-0 BEARING ISOLATOR

Instrument Transformers 25645-008-05 Current Transformer 300:5 Ratio 50-400Hz

 INSU 8 # CA11612 CONTROL

 INTER-CITY/WHITE-RODGERS 1149096 GAS VALVE 24V 1/2X1/2 PIPE 36E36-280

Interlink 5140CS 12" Fan Blade 23° Pitch .312 Bore CW

Intermatic WP1030MXD 3-1/8" Depth In-Use Waterproof Receptacle Double Gang Cover

Intermec 203-641-001 7X1B & CN3 Multi Dock Wall Mount Kit

Intermotor / Standard PC536 Crankshaft Position Sensor for Hyundai Santa Fe

Intermotor PC391 Engine Camshaft Position Sensor for Lexus LS400 SC400

Intermotor V469 PCV Valve for BMW 318i 318is 318ti

International / Navistar 2591053C91 Housing w/ Center Bearing

International / Navistar 4043121C91 Trailer Harness

International 1828345C91 Crankshaft Position Sensor replaces Ford 3C3Z-6C315-AA

International Navistar 1690018C1 Pitman Arm

International Navistar 1831443C91 Housing Kit

International Navistar 3676637C91 Engine Block & Fuel Heater Cable Y Cordset

International ZAJMJS3024ET051 / MJS3024ET MGM Spring Brake

Interroll Conveyor Belt Wheel Assembly 4X33 / 42-13

Interstate Batteries MED2247 Rechargeable Battery 12V 4.5AH NIMH

Interstate McBee M-3550763 Cylinder Head Gasket Set for Caterpillar

Interstate McBee M-6V2248 Front Structure Gasket Set for Caterpillar Cat

Intertek RM30DFPB Power Outlet Box 30A 125V

 INVENSYS ROBERTSHAW MC20-1102 SOLID STATE RELAY 90 SEC 120V 120 VAC

 IONPURE P90053 REV B ITERFACE PC BOARD

 IOR IR HFA35HB120C INTENATIONAL RECTIFIER DIODE SWITCHING 3-PIN USA

IPD 4P2654 High Compession Piston Body

IPR Injector Pressure Regulator Valve replaces F81Z9C968AA for Ford 7.3L 1995-03

IPS 69778 / ABA243 Plug Square Head Brass Southern Style 8"

IPS AB&A 60210 ABA564 Set-N-Go Shower Drain 2" Outlet

 IPT NV9H1VY30-SS-WO HT A10989 MAWP30,000PSI AT 72°F 316CW

 I-R INGERSOLL-RAND # 93912244 SPINDLE MODULE 130-02

I-R INGERSOLL-RAND # 99340457 MICRO TAS PLUS # 99340382

Irontek TB80013 261HB Fuel Injection Throttle Body for Ford Expedition Lincoln

ISB ISB4-12-6BB0 TRANSMITTER LIGHT CURTAIN

Iscar Drill Tip ISD-E3 .609 DT-P

 ISSC 1013-1-F-1-B SOLID STATE TIMER .06-5.0 SEC

 ISSC 1013-1G1B TIMING RELAY .06-10 SEC.

 ISSC 1214-1-G-B MOTION DETECTOR .06-10 SEC

ITE FJ2-B150 2 POLE 150 AMP CIRCUIT BREAKER

ITE Internal PS 200W 28V CINT1200A2875K01

ITE JL3-U225 3 POLE 225 AMP CIRCUIT BREAKER WITH SHUNT-TRIP

ITE KM3T400 CIRCUIT BREAKER TRIP UNIT

 ITE/GOULD SBJ2 MODULAR METERING COUPLING

ITS Universal Coin Mechanism 140664  (4-2)

 ITT 010-2538-903-00M DIA-FLO DIAPHRAGM VALVE CAST IRON BODY

ITT Cannon CA3100E18-10P-B-F80 Position Circular Connector

 ITT CONFLOW GH21TXMXXXA FLOW CONTROL VACUUM REGULATOR

 ITT GENERAL CONTROL B57RF58 MAGNITROL MARK II GAS VALVE 3/4X3/4 PIPE

 ITT GRINNELL 2538-2-M DIAPHRAGM VALVE 2-1/2" FLANGED

  ITT NEO-DYN 101P18C3 ADJUSTABLE PRESSURE SWITCH

Ives 7255 Center Hung Pivot Set SPBLK

 IWAKI RH500 BRAKING RESISTOR 7.5ΩJ 7.5 Ω OHM

IXYS Westcode N540CH18 Semiconductor Thyristor Module **

J&C Treadmill Protective Cover Indoor / Outdoor

J&N 230-24095 12V Regulator for Bosch Alternator

J&N 230-58055 Voltage Regulator Rectifier for Honda TRX500FA FourTrax Foreman

J&N 410-54241 / SMU0554 Starter Motor

Jac 2905010N Front Damper / Shock Absorber Assembly

JACOBS DRILL LATHE CHUCK NO.14N 3JT 0-1/2" CAP

JACOBS DRILL LATHE CHUCK NO.3B TAPER CAP 1/8-5/8 THD 5/8-16

Jade 2500149641 Volcano Burner Kit NG  *Damaged Base*

Jakel J238-112-11271 for GE WB26T10045 Blower

JAMESBURY VPVL100 SR4/5 B ACTUATOR MIN 60 PSI

Jamgoer 3-In-1 12V USB Charge Accessory + Voltage Display for RV Boat Truck

Jason UniMatch BX-158 BX158 Molded Cogged V-Belt 21/32" Top 161" Long

Jason UniMatch C-195 C195 C Section Industrial Belt 7/8" Top 199" Long

Jay Basic 300 Wheelchair Cushion 18" x 16" Mildly Contoured No Slip Bottom

JB Smith SP95 XXH 2" Bull Plug

JCB Block Assembly Hinge 331/31247

JDMON M12259C301 10.5mm Red Racing Spark Plug Wire Set for Ford Lincoln Mercury

Jeenda 6655216 Fuel Pump for Kubota V2203 L2800 L39 Bobcat S175 S185 S150

 JENKHO BT-06-C-50 PRESSURE CONTROL VALVE NO EXTRAS

 JENKINS BELLS MODEL 4035 AMBER FLASHERING BELL 120 V 10"

Jenn-Air Samsung Microwave Fan Motor DE31-10177E

Jenn-Air Samsung Microwave Stirrer Cover DE71-60121A

 JENNINGS RP173C VACUUM BREAKER INTERRUPTER CONTACTOR BOTTLE

Jenson JN02-03-24TR Furniture Power Strip w/ 4-Outlets + 2-USB Ports White

 JERGENS 32162 HANDLE WITH BUILT IN ELBOW

 JERGENS 61617 REGULATOR

JFG Racing 13110130 Foldable CNC Aluminum Pivot Levers for Husqvarna TC250 FX350

JK Electronics JK4D 4-Door Kit 20-043r.02

JK Hydraulics 66060691 / R-JK-534 Stabilizing Ram Valve

JLG 1321209 V-Ring

JMA UXP-4MT-12S 4.3-10 Male Torque Connector for 1/2" Superflexible Cable

JMA UXP-4MT-12S 4.3-10 Male Torque Connector for 1/2" Superflexible Cable **

JMA UXP-DM-158 UXP Connector DIN Male for 1-5/8" Coax 50 Ohm

John Crane 7.38" Stainless Steel Retainer 89183718 / H2873751190635

 JOHN CRANE B70007 SEAL KIT

 JOHN CRANE C37-5875-062 5.875 INCH FACE:POLISHED

 JOHN CRANE SAFEMATIC 228542200001 LOW METER SFP-08-10-00/AC1

John Crane Stainless Steel Collar C28412510190635 / 89072346

 JOHN CRANE TYPE 515T 75MM MECHANICAL SEAL ASSEMBLY

John Deere / Hultdins F685939 / 0695277 Harvester Head Bracket

John Deere / MSSL AA76124 Wiring Harness

John Deere AA88058 Seed Closing Arm Right Side

John Deere AFH209523 Gas Operated Strut Cylinder 950035 1500N 146/14 B 5

John Deere AH162666 Hose 3000 PSI

John Deere AKK17213 Tread Adjust Sensor

John Deere AKK42111 Wiring Harness

John Deere AM137910 Wiring Harness

John Deere AN405094 Battery Cable for R4030 R4038 R4045 Sprayer

John Deere AT220717 Hydraulic Hose

John Deere AT378444 Hydraulic Hose

John Deere AT380520 Hydraulic Hose

John Deere AT380524 Hydraulic Hose

John Deere AT380525 Hydraulic Hose

John Deere AT382065 Hydraulic Hose

John Deere AT382072 Hydraulic Hose

John Deere AT382073 Hydraulic Hose

John Deere AT382191 Hydraulic Hose

John Deere AT417962 Hydraulic Hose

John Deere AT417963 Hydraulic Hose

John Deere AT417966 Hydraulic Hose

John Deere AT417967 Hydraulic Hose

John Deere AT417968 Hydraulic Hose

John Deere AT428007 A/C Line Hose Approx 60" Parker 7639 MP R134A 5/16 Barrier

John Deere AT449171 Wiring Harness

John Deere AT468765 Engine Wiring Harness