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

Mercer 9100 1"MNPTx 1"FNPT 1287 PSIG Orifice C Safety Soft Seat Relief Valve

Mercer 91-M2C71P15U5XP 9100 Series Model 20 Safety Relief Valve 3/4" 4500 psi

Mercer Pressure Rel Valve 8100 G Orifice 2" Clsd Cap GAS SERVICE 301-2000 PSIG

Mercer Pressure Relief Valve 5500PSI 91-62C61P6941 3/4" 5638 Cap. Air

Mercury ECO Monitor N2K Level 2 Smart-Tow Gauge Kit 79- 8M0135617

Mercury Mercruiser Throttle Body SAE J1171 Marine 8M6010558

Meritor 20RHS078B017 Drive Shaft Assembly Snap Ring Bare Outboard High WingRPL20

Meritor 3133H9524 Front Axle Steering Arm fits 3133H9472K LA47591BOM LA47441BOM

Meritor A43-3276-L-12 Vacuum Brake Chamber For MRAP LMTV

Meritor Air Brake Chamber A43-3276L12 12450341 1216TLV0-3729 Black Metal

Meritor Brake Assembly RD41018 257 A19-1406 R403

Meritor Disc Brake Caliper Semi-Loaded Front For 1991-2004 liner FL60

Meritor EX225L248XX000 SVC CALIPER-OPP For Volvo 410 mm Motor

Meritor Hub And Rotor Assembly 16-16158-1000

Meritor Long Stroke Spring Brake Chamber 5/8" 3" Stroke For S-Cam Brakes Drum

Merits M9KA-1R Right Power Wheelchair Motor 24V 1350W 4000RPM SEE DESC

Merkle-Korff 2U-Z11854 Motor Gear 120V 60Hz 0.45AMP B4520UI-060

MERLIN GERIN NSJ400 400A, 600V, 3P CIRCUIT BREAKER 50-60HZ

MERLIN GERIN NSJ400 H 400A 3P CIRCUIT BREAKER 600V

Mersen Advanced Motors & Drives 140/012C 12V Carbon Motor Brush

Mersen Ferraz Shawmut 1100V AC 1000AMP Protistor Fuse K301056 A110UD73TTI1000

Mersen Ferraz Shawmut A4BQ1600-SEA-2 Time Delay Fuse 1600A 600V AC

Mersen Ferraz Shawmut AJT400N Dual Element Time-Delay Class J Fuse 400A 600V

Mersen Ferraz Shawmut CP750C7-HS Cable Fuse 600V 750MCM C7-HS

Mersen Protistor D600SE42C150QF V079667 4200VDC 150A Speed aR 600 Fuse Size

Mersen-Ferraz A4BQ800-SEA-2 Time Delay Fuse 600 VAC 800A Amp-Trap 2000

Merten Maschinenbau CT/1090 CT/2090 D308 Upper Knife LH 0RT00545001

MERU NETWORKS MC3000 HARDWARE LAN CONTROLLER

Metabo HPT H65SD3M 1 1/8" Hex 38 lb Demolition Hammer SEE DESC

Metabo WPB 38-18 LTX BL 230 9" Cordless Large Angle Grinder Bare Tool Only

METAPHASE TECHNOLOGIES SSI103VCAV1 PULSED POWER SUPPLY

Metaris 120010 Hydraulic Pump 7GPM 2000PSI 2800RPM V1C-1P07P-001C-20

Metaris C102 Hydraulic Dump Pump W/ Air Shift Cylinder MH102-2.5

Metaris MMS 29.9 IN 3/r 4 Bolt 1.25" Straight Shaft Low Speed High Torque Motor

MetGlas Metal Joining Brazing Foil 4.5"X10.5" 1.5 Mil MBF30 00012454

METROHM 655 DOSIMAT TITRATOR

METROHM 716 DMS TITRINO KEYBOARD 6.2132.020

Metrohm 96X Electrochemical Elisa Plates Dropsens Carbon Electrodes

METROHM BRINKMANN E 586 LABOGRAPH

METROHM T.001.0535 3.66J.0961 4.665.0075 3.665.0070

MetroVac AFTD-3 Air Force Commander Speed Dryer Dog Pet Grooming SEE DESC

METTLER H80 BALANCE GRAM LAB SCALE 160G MAX

METTLER LJ16 MOISTURE ANALYZER PJ300MB LP16J

METTLER PM100 ANALYTICAL BALANCE SCALE LP16

METTLER PM4600 DELTA RANGE SCALE

Mettler Toledo 30601832 Single Use PH Sensor InSUS 310 For Bioreactors

METTLER TOLEDO 58032200 363-101 pH SENSOR 3/4" NPT

METTLER TOLEDO 8001 BALANCE

METTLER TOLEDO 9360 SCALE HEAD

METTLER TOLEDO AG SEVENEASY CONDACTIVITY BALANCE SCALE CONTROL DISPLAY

METTLER TOLEDO AG204 ANALYTICAL BALANCE SCALE

METTLER TOLEDO DL38 KARL FISCHER TITRATOR

METTLER TOLEDO DM40 DENSITY METER

METTLER TOLEDO E15290700A DUAL ANALOG PC BOARD

METTLER TOLEDO HG53 HALOGEN MOISTURE ANALYZER

METTLER TOLEDO HR83-P MOISTURE ANALYZER

METTLER TOLEDO ID7 WEIGHING TERMINAL INDICATOR STAINLESS STEEL

METTLER TOLEDO IND131 WEIGHT TERMINAL

METTLER TOLEDO IND690-DESK WEIGHING TERMINAL

 Mettler Toledo IND780 Harsh Advanced Weighing Terminal Display LCD

METTLER TOLEDO JAGUAR JAGXTREME SCALE CONTROLLER JXPA 1060000

METTLER TOLEDO LC-G TERMINAL

Mettler Toledo Load Cell MT1260-100KG MT1260 100KG M3203F

METTLER TOLEDO LP16J MOISTURE ANALYZER BALANCE

METTLER TOLEDO ME30 MICROBALANCE 707689 185-245V 50/60HZ

METTLER TOLEDO ML1502E SCALE

METTLER TOLEDO ML503T/00 PRECISION BALANCE

METTLER TOLEDO PBA220-QB60 WEIGHING PLATFORM

METTLER TOLEDO PG4002-SDR LABORATORY BALANCE

METTLER TOLEDO PG5002-S MAX 5100g BALANCE SCALE

METTLER TOLEDO PR8001 BALANCE SCALLE

Mettler Toledo Safeline PowerChek Plus X-Ray HiGain 500 x 0.8 Metal Detector

METTLER TOLEDO SB32000 BALANCE SCALE

METTLER TOLEDO TRB 8300 TRANSMITTER

METTLER TOLEDO TYPE RONDO 60 TOWER V2.10

METTLER TOLEDO XPR4002S PRECISION BALANCE

METTLER TOLEDO XSR4002S PRECISION BALANCE 4100 g BASE ONLY

MEV300FIR/265 3" MPT Full Internal Relief Valves Migrating Nitrile 265psi

Mevotech Wheel Bearing and Hub Assembly Front TXF40306

MFFA63/2 Filter Element Cartridge L901811, 5" dia x 12-1/4" Long

MFPSeals 2-3/8"ID 2-3/4"OD NBR 90 Black Nitrile O-Rings OR-332N6003

MFPSeals 3-1/8"ID 3-1/2"OD NBR 90 NItrile O-Rings OR-338N6003

MGM 2-1/4" 3421 Series Stroke Air Spring Brake Chamber 3421051 Model TR2024T

MGM Brakes Combination Air Brake Chamber #3232059 For Military Vehicle

MGV KRC USV 2 KRCUSV2 CIRCUIT BOARD

MGV P3094-05121AC POWER SUPPLY 2.3 AMP 94-138 VAC 47-66 HZ

Mi Jack Rexroth 41083213 Hydraulic Axial Piston Load Sense Pump R902406888

Micanan Pro-GHE Control Box w/Logic Board 6045-047 Heavy Duty Garage Door Opener

Mico Multiple Disc C-Mount Brake 3C-141380-D

MICRO EPSILON IF2004B2 INTERFACE CARD

MICRO INNOVATION AG XV-100 XV-100-B0-35TQR-10 OPERATOR PANEL

Micro Matic 744-048 RSV DEF Dispense Coupler 3/4" Barbed Outlet

MICRO MEMORY REV. E MEMORY CIRCUIT BOARD CARD MM-6230

Microchip MPLAB ICD 4 In-Circuit Programmer Debugger DV164045

MICRON MD240-24-3C DINERGY POWER SUPPLY

MICRONET PHD8072U2F EXTERNAL FIREWALL USB HARD DRIVE

Microroller Motorized Conveyor Roller 15" Length UIPM486FE-60-366-D-024-P2-KF

Microsemi APT60GA60JD60 IGBT Modules FG IGBT-COMBI 600V SOT-227

MICROSOFT SURFACE PRO TABLET W/ 1617 CHARGING DOCK

Mid America 12" X 18" Classic Vinyl Gable Brick Mold Vents White

Midland 90° Street Elbows 28-156 1/8"FNPT x 1/8" MNPT

Midland Carriers Hose Reel Motor Connection Hub Adapter D8093693 9290357

Midland Industries Swivel Adapter 3-1/2" FNST x 2-1/2" MNPT

Midland Vacuum Relief Valve A-222-W-NS-FR20-4-VA 217-84-SS

Midland Vacuum Relief Valve Midland A-222-W-NS-RTVGFS 217-84-SS A-222

Midopt Midwest Optical BP590 Orange Bandpass Filter 58mm, 560-600 nm

MID-USA 17580 Power House Plus Ignition Module for Harley Big Twin 1970-1999

Midwest 100-Amp Power Outlet Box with GFCI U075CTL010 120/240v

Midwest Fasteners 101-0501-50 Magnetic Cup Head Chuck Posi-Weld

Midwest U036C010 40A 120-240V 3-Wire 1Ph Type 3R Enclosure 20/20GFCI Unmetered

Mifab HY-1500 Hydrant Nickel Brass Low Lead No Freeze Wall Mount Hydrant

Mighty Mouse Crimp 801 Connector 85 BeCu Female Contact Socket 809-002 Mil Spec

Mighty Mule DC Slide Gate Opener Kit System for Residential Up to 24' 650LBS Cap

Miki Pulley PE-325-B Variable Speed Drive Belt Drive Clutch Type AA22x19

Mild Steel Merge Collector 2 into 1 CC211MS 05-145450 2-1/4"x 2-1/2"

Military Standard Type S Terminal Board MS18029-5S-4

Millennium Edcd Enhanced Door Control Device/Circuit Board 149-101966

 MILLER 4MA SERIES 04.00 BE4MAU14A 10.000 250 PSI CYLINDER

Miller Circuit Board Card Assembly Control 207882

Miller Hardware Liner Kit 30W for Steel & Stainless 198377

Miller Smith ST815 Heavy Duty Propylene Heating Tip for WH200 & SW1B

Milling Cutter Gear Hob PM5 ALC J99663 1THD RH CL-B 40204552 6 Lobe Rotor

Millipak 200 Capsule Filter Units 0.22 µm 9/16" HB/HB MPGL20CA3

Millipore Durapore CVGL71TP3 Hydrophilic Cartridge Filters 0.22um 10" L

Millipore In-Line Gas Filter 3/8" Gasket VCR 600PSI WG2F36WR1

Millipore WG2F36WR1 Wafergard II F6 In-Line Gas Filter 3/8" Gasket Seal

Milltek Exhaust System Connecting Pipes for 2017-2019 Audi 4S R8 V10 SEE DESC

Milltek MSAU308/MSAU307 Resonated Center Exhaust Left & Right Side For Audi RS4

Milvaco 2-1/2" Flanged IBBM Gate Valve 125SWP 200WOG F2885-M-212

Milvaco 2974-M 3" Cast Iron Flanged IBBM Check Valve Black 200 WOG

Milvaco 4" Cast Iron IBBM Check Valve Fig 2974M 125S 200WOG

Milwaukee 1-1/2" Socket Weld Stainless Steel Ball Valve 39146A 1000WOG