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

C-032 LIQUID LINE  MODEL FILTER-DRIERS SPORLAN CATCH-ALL

GAI TRONICS 12519-001 REPLACEMENT CRADLE KIT

M452267 RING WEAR BODY FOR 2" 7500PSIG CAMERON IRON

510695314 LIEBHERRGAUGE CONNECTION

BEPK5B-270 SEAL FOR AIR HOIST INGERSOLL RAND

16401-6 VARCO BJ TONG DIES

8478924 EMD ORING SEAL ELECTRO MOTIVE DIESEL 0

40014415 EMD GASKET 5

F150352 PLUG OVERFLOW 1-3/8 - ALLIANCE LOT OF 6

P-064421-K0000 REXROTH AVENTICS H-4 CONTROLAIR VALVE KNOBE

AI-201 AMBER INDUSTRIES TRANSIENT AND NOISE SUPPRESSOR

MECHANICAL SEAL TYPE1520-16MM

BEARING FOR INGERSOLL RAND AIR HOIST 6014-ZZ IR P/N: BEPK5B-97

90796 ARO VALVE INSERT

81.12101-6013 FUEL PUMP REPAIR KIT

4372521 COUPLING KEY MISSION

DANFOSS PS52 754 A350 LF2 GAUGE VALVE, 3/8 "FPT-3/8"

G057 JOINT KIT IMO PUMP

3UA7021-1D SIEMENS OVERLOAD RELAY

157B3999 DANFOSS SEAL KIT PVM/PVMD

T-9K-7 WHITEY MS-PKG-33

08148 STANLEY THRUST NEEDLE BEARING FOR IW24  IW16 IMPACT WRENCH

ECM100US12 XP POWER SWITCHING POWER SUPPLY P/N 10004293

5B-2113 BEARING CATERPILLAR 5B2113

8H-2778 GASKET CATERPILLAR 8H2778 LOT OF 6

6L-5766 GASKET CATERPILLAR 6L5766 LOT OF 10

8T-9825 WIRE ASSY CATERPILLAR 8T9825

SNSR S2000 ECOLAB W/24FT CABLE

PH-78422 SHAFT PH HYDRAULICS  ENGINEERING PTE LTD

FB2PST Y FB2PST-1 FEDERAL SIGNAL STOBE LIGHT PC BOARD FIREBALL LIGHTS

KEY AE-41 HT775 MADE IN USA

5N-4718 GASKET CATERPILLAR 5N4718 LOT OF 9

7L-8682 GASKET CATERPILLAR 7L8682 LOT OF 7

M400778P ALLIANCE THERMOSTAT 1077452

82030S30 OVERHAUL SEAL KIT DANFOSS

OPC-C1-RS DRIVE BOARD FUJI ELECTRIC

5000106 NOZZLE 15DEG SPRAY FOR DIRT KILLER E300

210441 FANN 0

LR2D1316 OR LR2 D13 16 OVERLOAD RELAY TELEMECANIQUE

LR2D1316 OR LR2 D13 16 OVERLOAD RELAY TELEMECANIQUE

LR2D1312 THERMAL OVERLOAD RELAY TELEMECANIQUE

113123 750X17-18.875X11 CONDENSER TL TOOL TUBE EXPANDER ELLIOTT

5P-4941 SEAL CATERPILLAR 5P4941

206-895 ROHS LED PANEL INDICATOR LIGHT YELLOW LOT OF 10

0851220000 PARKER HYDRAULIC ACCUMULATOR

0501095 MEIKO PUMP SEAL MOTOR

389-0777 RS PRO BENCH GRINDER STAND

301-3908 STORM IP54 16 KEY POLYMER KEYPAD 300-16-07 KEYMAT TECHNOLOGY LTD

14803/18 GARDNER DENVER EXTENSION PIECE 1/2" BSP

157B6999 DANFOSS SEAL KIT PVB32

PREMIUM ANNULAR CUTTER 45 MM CUTTING VACO FRANCE HARD CUT KBL 045

3RH1122-1GA22 SIEMENS CONTACTOR RELAY

654637 MIDDLE SPACER WASHPIPE NOV

14383A4 MYERS PUMP OIL SEAL 14383A004K

487-2887-801 SEAL FOR STORM ANCHOR HYDRAULIC MOTOR USE

07998 SPOOL WELDMENT-OC

HATCO R02.04.502.00 ELEMENT KIT, 480V, 5000W, 11-1/2"

BAUER COMPRESSORS 600 PSI GAUGE 02-1592-T

HOBART 00-201223-00004 CUTTER BLOCK

219673 SPACER CABLE NOV - SHAFFER LOT OF 8

20023014120 CALIBRATION TOOL W HER FOR PRESSURE TRANSMITTER 200230141-20

178957 RESTRICTION INDICATOR FIT FOR CUMMINS

RC252K HYDRAULIC CYLINDER REPAIR SERVICE KIT ENERPAC

1320-4197 SEAL KIT 1" 4 WAY VALVE 3 POSITION

920304 VICKERS (DANFOSS) SEAL KIT

948801-1001 PARKER HYDRAULIC FILTER

77265 ARO CUP INGERSOLL RAND

2910360700 ATLAS COPCO LOADING VALVE KIT 2910-3607-00

VERSA SV-3 PNEUMATIC SHUTTLE VALVE SV3 1/4" NPT 5-200 PSI

3179027 GASKET XSL LOT OF 8

90A037 NITTO THROTTLE LEVER FOR JET CHISEL JEX 24

71350656 SEAL INGERSOLL RAND FA150KGI MAN RIDER

20C0046 OIL SEAL  RING

R07-200-RGKA NORGREN REGULATOR R07200RGKA

8345868 SEAT ELEMENT EMD ELECTRO-MOTIVE

PT-411-20 GASKIT 4" FOR VICTAULIC COUPLING

0084464 DAIKIN PRESSURE SWITCH MADE IN JAPAN

27347 O RING KIT INGERSOLL-RAND

VICKERS 31496 REV 2 AIR VALVE  

NON RETURN VALVE WARTSILA (ITEM 120) TYPE TT120160014 132SBA1A1A0

TKB-16J OKI 0600072000 DIAL PAD (KEY BOARD)

8370886 SNAP RING ELECTRO-MOTIVE EMD LOT OF 10

8055831 SNAP RING TOOL ELECTRO-MOTIVE EMD

3388571 GASKET ELECTRO-MOTIVE EMD LOT OF 10

51651 INGERSOLL RAND O-RING LOT OF 14

PMMN4021 REMOTE SPEAKER MIC PMMN4027 PMLN4694 MOTOROLA

LAD4RCE SEQURE D

23514970 PISTON RING SET FOR IL71 AND V71 DETROIT DIESEL ENGINES

AAC5813 LAMP ASSEMBLY W/L TMS 561 PROMINENT

3002-2117 T330 CRANK CASE OIL SEAL

304-S3-PP-12T SWAGELOK BOLTED PLASTIC CLAMP TUBE SUPPORT KIT

1B887335032 ORIFICE BLEED TYPE 99 PRESSURE REDUCING REGULATOR

36764066 HAMWORTHY BUSHING

ESB554 OPERATOR PUSH/PULL SPN20-7.5 A.R LIFT-A-LOFT

AIR PRESSURE TRANSDUCER, DPT2640-0R5D

K6U-366 BEARING INGERSOLL RAND NON RETURNABLE INTERMEDIATE GEAR BEARING

4016159 AIR INLET NOZZEL DISTRIBUTOR MAKE BEKO TECHNOLOGIES

56-03-368 VALVE HYDRAULIC REGULATOR FLO-LOK VALVES

NTN 63306C3 SINGLE ROW RADIAL BALL BEARING MADE IN JAPAN

051-KR011-100 MILLER ROD SEAL KIT

051-KR011-100 MILLER ROD SEAL KIT

0-6319-0095-00 SHIM SET NOV-VARCO

0229031 THROTTLE LEVER 1 PCS

8466066 ELECTRO-MOTIVE RING FOR AIR MOTOR PISTON EMD 1-8466066 LOT OF 6

32499659 INGERSOLL RAND CRANKPIN BUSHING

21016 HYDRIL THRUST WASHER

3W63479 INGERSOLL RAND COMPRESSOR SPRING KIT

R433039523 REXROTH KIT P-173698-K0000

148B6151 DANFOSS SVA OVERHAUL KIT

046236 STAINLESS STEEL SCRAPER BLADE CLIP M410 LOT OF 8

NHI11-PKZ0/XTPAXSA11 EATON ELECTRIC AUXILIARY CONTACT

1877157-E NOV TEST PLUG 1877157

FEDERAL SIGNAL LP3S STREAM LINE 12-48VDC SERIES B GREEN

00-274021 HOBART DOOR SWITCH KIT

A604 ENERPAC REGULAR HYDRAULIC SPEE-D-COUPLER A-604

1127782 SPECK BS 50 DISCHARGE VALVE STEAM SEAWATER EDITION 5/91

D2475-4266 CRYDOM SOLID STATE RELAY

324067 HOBART AXLE 00-324067-000 HOBART AXLE

35800192 INGERSOLL RAND HOURMETER 115V, 60HZ

70035 CR OIL SEAL

2601-1150 MCGILL SNAP MICRO SWITCH WITH HARDWARE

7221 R30K BI TECHNOLOGIES POTENTIOMETER  PCS

RC-212 WOLFLITE QUICK CHARGER FOR WOLF RECHARGEABLE TORCH

1-8160209 LINE ASSEMBLY FUEL OIL ELECTRO MOTIVE EMD

150LF-11A END PLATE ENGERSOLL RAND

01-1000V6-00201 HOBART RELAY SOLID STATE WATLOW SSR-240-25A-DC1

CA7-12-01 SPRECHER AND SCHUH CA7-12-01 3 POLE 25A CONTACTOR

S907-A CUMMINS PLUG

0E5507 ELECTROLUX LOCKING NUT 710E5507

87.00.325 RATIONAL CONVERSION KIT

11-0351-02 CUBE SIZE CONTROL SCOTSMAN A22-1228-000

UK5N PHOENIX CONTACT TERMINAL BLOCK LOT OF 6