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

GT5P MINIATURE TIMER 24 VAC  /

05-0003-000700BN BARTEC PUSH BUTTON

3M HALF FACEPIECE REUSABLE RESPIRATOR M7502/37082 MASK

 3M HALF FACEPIECE REUSABLE RESPIRATOR M7502/37082 MASK

36297901 SOCOMEC POIGNEE LAT. INTERIEUE NOIRE FUSERBLOC HANDLE 100-400A

2063-6-6S FITTING AIR CYLINDER AEROQUIP

8501KPR12V20 SQUARE D GENERAL PURPOSE RELAY

33775 WIX SPIN ON FUEL WATER SEPARATOR W/ OPEN

ALLEN BRADLEY N45 THERMAL OVERLOAD RELAY HEATER ELEMENT

UNIWELD W05 TANK KEY WITH SECURITY CHAIN (4 WITHOUT CHAIN 2 WITH CHAIN) LOT OF 6

 UNIWELD W05 TANK KEY WITH SECURITY CHAIN (4 WITHOUT CHAIN 2 WITH CHAIN) LOT OF 6

TS-320SB KOREA RAINBOW DITAL CAPILLARY THERMOSTAT

TYCO ELECTRONICS HN61KK324B CARRIER AC RELAY

C800S PARKER COLORFLOW C SERIES HYDRAULIC CHECK VALVE

71113179 OIL SEAL INGERSOLL RAND

E40 DIAPHRAGM

22003718 AXLE LATCH LOT OF 6

G7L-1A-TUBJ-CB OMRON GENERAL PURPOSE RELAY

G7L-1A-TUBJ-CB OMRON GENERAL PURPOSE RELAY

M20 220 B BUNN OMATIC TREND INSTRUMENTS

CD50CNF05NO CARLO GAVAZZI LIQUID LEVEL SENSORS

FX4010 PAULUHN LAMP HER

GENERAL ELECTRIC CR104PXC10R CONTACT REED SWITCH CR104P

TROMBETTA START RELAY 974-2411-210-09 24VDC COIL

MAAG EXTREX EX 45-5 GP PLASTIC ALLOY GEAR PUMP

AR-50-2500 AIRCEL REFRIGERANT AIR DRYER

HENGSTLER ENCODER AX71/1214EK.42DPX-F0:5604 NOV

CAT 3520 PLUNGER PUMP

6702ED530-1 CUTLER HAMMER CONTACTOR 6702ED5301 - 1200A

91484 SHELL ACTUATOR IBOP NOV-VARCO PH-85 PIPE HANDLER

EX 1302-Z2 NOV MD TOTCO HAZARDOUS AREA COMPUTER NATIONAL OILWELL VARCO

BLAK-JAK TORQUE PRO - NOV NATIONAL OILWELL VARCO TORQUE MASTER - NOV

NATIONAL OILWELL VARCO 80502100 MISSION BLAK-JAK HYDRA-CEL LOAD CELL

G500EMK MAJOR REPAIR KIT FOR KELLY VALVES - SAFETY VALVE

98892 SHELL ACTUATOR IBOP NOV-VARCO

K6U-545 INGERSOLL RAND VALVE CHEST COVER

650756A NOV WIRE LINE CLAMP FOR DRAWWORKS NATIONAL OILWELL VARCO

654920 NOV WIRE LINE CLAMP FOR DRAWWORKS NATIONAL OILWELL VARCO

100907801 FMC TRONIC TEST CONNECTOR FOR PARKING STUMP ST/FABS6360/RW/FW1

K6U-502 MOTOR MOUNTING BRACKET INGERSOLL RAND K6U502

5000 PSI CHART RECORDER HYDRAULIC DEWIT MODEL 4888SST

7251080010 BALANCER SPRING PROTECTION MADE IN GERMANY

K6U-545 INGERSOLL RAND VALVE CHEST FOR K6U/K6UL ()

3063631 ENGINE PRE HEATER CUMMINS 240/480 VOLTS 4000 WATTS

16CB500 EATON AIRFLEX 142211KY ELEMENT AIR CLUTCH BRAKE

5120726M DETROIT BLOWER ASSEMBLY 5114442,5122363

COLCHESTER MASTIFF 1400 LATHES 48301-0,48115-0,48116-1 (1 LOT AS PER PHOTO)

OV HELIOS 25K LED SABSEA FLOOD LIGHT POWER SUPPLY: 90-254VAC/DC,50/60HZ

K6U REMOTE CANTROL BLOCK ASSAMBLY INGERSOLL RAND

1292147 PISTON ROD FOR 12-P-160 MUD PUMP MADE IN USA

7345 SONARDYNE MODEM (SUBSEA)

AGING CELL OFITE STYLE 303 STAINLESS STEEL  CELL

SEAWARD SUPERNOVA ELITE PORTABLE DEVICE TESTER

M3452-U600CK6-A BONITRON HEAVY DUTY BRAKING TRANSISTOR

DM-500KP DONG KUN 220 VAC MOTOR KP102-PM1-10-1H-D1 PUMP

1110T20 FALK SF COUPLING T TYPE DRAWING NO.90067402

MD TOTCO LOAD CELL SENSOR WITH E40 DIAPHGRAM REPAIR KIT  2" 1502 HAMMER

191000 MD TOTCO  ASSY EQUIPMENT  INSTRUMENT DRIFT RECODER 8°(ITEMS AS PHOTO)

2185241-01 CHECK-VALVE PILOT OPERATED

EPC-400 CONTROL MODUL ALFA LAVAL 3183050104 VER. 1

B750927 MANIF ASSEMBLY HYDRAULIC PIPING ANTI TWO BLOCK MAKER AMCLYDE

LA-5-C-MA-FCFP FLOW TECHNOLOGY HS-3262XW-LED5X TURBINE FLOW METER

06-041-224 LEVER BRAKE LIMIT FOR DRAWWORKS 06041224 LOT OF 8

D28457 POWER RESISTOR ASSEMBLY 7967-300-2222 BAYLOR-ELMAGCO 7838 / 284573

40219506 MD TOTCO PCB BOARD ANALOG

402233931-3777 PRESSURE TRANSDUCER ASSYEMBLY MD TOTCO

8428395 ENGINE PROTECTOR EMD DETECTOR ASSY LOWER WATER AND CRANKCASE

1B-G0150 FMC BALL VALVE 1B-G0150-ADDD1RC21

1000 PSI SYM856 CHART RECODER HILLCREST ENGINEERING CH2001

K6U-1252 INGERSOLL RAND BRAKE BAND SET K6U1252 (K6U-152,K6U-252)

PD5-526 ROTARY VALVE FOR RAM AIR WINCH

30160396-501 RH UPPER HOUSING FOR NOV ST-80 ROUGHNECK

K6U-C357 DRIVER GEAR INGERSOLL RAND

2AM32 ROPER PETROLEUM TRANSFER GEAR PUMP

6702ED553 CUTLER HAMMER CONTACTOR 1000A 1000VDC COIL 74VDC

FMC TECHNOLOGIES 3265500 REPAIR KIT COMPLETE 3X3 ULT-150 PLUG VALVE REPAIR KIT

TEC-100K-01AHD NOV MD TOTCO LINE TENSION TRANSDUCER

VARCO BJ 202414-10 HYDRAULIC BLOCK FOR SLIPS,BOP RAM WFP782-4

21353-03-07 GATE AND SEAT ASSAMBLY FOR 3 1/16" 10000 PSI CAMERON

20VC600 EATON AIRFLEX BRAKE SHOE ASSEMBLY(SET OF 10) P/N 307359

15146 NOV ANSON PLUG VALVE 3" COMPLETE REPAIR KIT (ITEM AS PER PHOTO)

SKF HAMWORTHY PLC 3309 A-2RS1/MT33  BEARING N200329AA18/19ZT10057

JACK HYDRAULIC FOR VALVE SEAT PULLER NOV MISSON M1061

641116157 STUFFING  FOR MISSION MAGNUM I PUMPS

K5B-L505-47 CYLINDER SLEEVE INGERSOLL RAND (71390181)

RH1.0-14UNF DRAWWORKS ENCODER 10695648-002

0100-0150-01 SCR BRIDGE ASSEMBLY RESISTOR 25Ω 55W

ABB DCF506-0140 DCF1127101R0001 ABB OVERVOLTAGE PROTECTION

2-75-2A2XHV IBOP MAJOR PARTS KIT 2-75-15SLHV M  M OIL TOOLS

PD5-516 CRANK ASSEMBLY RAM WINCH

OV HELIOS 25K LED SABSEA FLOOD LIGHT POWER SUPPLY 90-254VAC DC ( )

OV HELIOS 25K LED FLOOD LIGHT ( )

OV HELIOS 25K LED FLOOD LIGHT POWER 90-254VAC DC ( )

NRD-16R NPK ULTIMATE HEAVY-DUTY AIR DRILL

D10-526 ROTARY VALVE INGERSOLL RAND

A7054-176 BASKET GRAPPLE 5-1/2 (B2374) 150OVERSHOT LOGAN OIL TOOLS

D28457-2 POWER RESISTOR ASSEMBLY 7967-300-2222 BAYLOR-ELMAGCO 7838

32278541 INGERSOLL RAND FLOATING PISTON ASSEMBLY MADE IN USA

BAKER SPD 052090042 REPAIR KIT 3" FOR HIGH PRESSURE VALVE 2-5000 PSI VALVE

C20003050 PISTON 3RD STAGE VHP15 TYPE:5415 COMPAIR

NRD-22R NPK DRILL ULTIMATE HEAVY-DUTY REVERSIBLE AIR DRILL

8141909 EMD GEAR 113 TOOTH ELECTRO MOTIVE

25726 PISTON ASSAMBLY MODEL FA2B INGERSOLL RAND

310X-MV FEDERAL SIGNAL AUDIOMASTER TWO-WAY INDUSTRIAL INTERCOM

2110258 PLUNGER ASSY SPARES OF DRAWWORKS  ROTARY TABLE NOV 2110035 REV C

2110258 PLUNGER ASSY SPARES OF DRAWWORKS  ROTARY TABLE NOV 10091011-001 REV D

PD5-A513A PISTON FOR RAM AIR WINCH

HR-33SF TORQUE TOOL DISTRIBUTION BLOCK

LN-5-C-MA-FCFP FLOW TECHNOLOGY TURBINE FLOW METER CAMERON

85603 GEORGE BRAKE CORPORATION 7967-300-2214 MAIN CANTROL PCB

MLK-A269C INGERSOLL RAND PENDANT ASSEMBLY KIT

D10-525A ROTARY VALVE BUSHING INGERSOLL RAND

TROJAN 0ES7021-250C00 LED DISPLAY BOARD 912491 702J07037/J122

40219493-014 MD TOTCO REV M 219494-001 FAB

ECT-40-150 CURRENT TRANSFORMER KYOTO JAPAN

02250154-051 SULLAIR DISPLAY CONTROL BOARD E213441

511477714 CHECK VALVE FOR LIEBHERR CRANE

SLA03 ANGLE SENSOR ASSEMBLY

P-RKV80-158-19M TURCK MINI FAST CABLE LOAD CELL 60FT 8024523011

ANCHOR MARINE VINTAGE IN ANTIQUES STYLE (21 KG)

2984885 PARKER HYDRAULIC CONTROL BLOCK 40311 SHUTTLE VALVE FOR 6032 CRANE

HCY31083 PISTON ASSAMBLY 3RD STAGE 4SW80 HAMWORTHY

FURUNO FP-70 PRINTER UNIT-

3132373 HYDRIL COMPANY REPAIR KIT VALVES 5 1/4" KELLYGUARD

641209903 MISSION CENTRIFUGAL PUMP IMPELLER NOV MISSION 19116-A0-30

35030479 CAMERON POLARITY SENSITIVE SWITCH

CYLINDER FOR K6U-L505A INGERSOLL RAND AIR TUGGER

STEARNS 5-66-8424-00 FRICTION DISC M 8-004-208-00 NOV 800420800 LOT OF 6

22505 PARKER CHECK VALVE MADE IN USA

3157168-7 MAN DIESEL  TURBO SBU MODULE REV.1.4

14DD6 PROXIMITY ROTARY POSITION INDICATING SWITCH 231684 NOV