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

EFSR APPLETON EXPLOSION PROOF SWITCH TWO GANG MADE IN USA

261829-101 MD TOTCO TRANSDUCER MOORE PRODUCTS MOD 77-3

DMC-100A PEAKTRONICS INC LOT 4PCS

35252667 CHECK VALVE INGERSOLL RAND

0522-2400-21 NATIONAL OILWELL VARCO DC CONTROL MODULE

124500-101 MD TOTCO STABILIZER ASSEMBLY 2606793 FINGER 3-1/2"

B258669 INGERSOLL RAND 29301 BRAKE BAND ASSEMBLY FOR FA150LGMR 328-29303

10724 INGERSOLL RAND BRAKE BAND ASSEMBLY FOR FA2  FA2.5 WINCH

11-00307 BARKSDLE VALVE 4 WAY MANIPULATOR TYPE

ENERPAC RAC302, 30 TON CAPACITY,10000 PSI ALUMINUM HYDRAULIC CYLINDER

ENERPAC RAC306 30 TON CAPACITY ALUMINUM HYDRAULIC CYLINDER

4L11982 SPM Plug Valve Repair Kit 2" Fig 1502, 10,000 PSI

40224300-004 NOV MD TOTCO PIT LEVEL SENSOR MODEL-30 (BY ER)

P10120A-01 MD TOTCO NOV LOAD PIN, TENSION LOAD CELL P.T 40000 HYDRAULIC TONG CYL

99-10004 REPAIR KIT 1-1/2"HKR VALVE KOOMY 1111-4199

NABCO MT-800-S16 MAIN ENGINE TELEGRAPH

SHP METER JRC NDL-20A MADE IN JAPAN

75-00020 PNEUMATIC TOGGLE VALVE SHORT KOOMEY STYLE (805042)

10-600 SERIES SC HYDRAULIC PUMP

56037 REV.C PCB CARD 56038 REV F BAYLOR COMPANY

28002 VALVES

K6U-1252 CLUTCH BRAKE BAND INGERSOLL RAND K6U1252

382-29302 INGERSOLL RAND BRAKE BAND 29239 (30002286-1180)

RHS1K0E OHMITE HAND THROTTLE FOR DRAW WORKS  MUD PUMP 1kΩ

DS-740 FURUNO COMPASS SAFE DISTANCE 65P3015 FURUNO

P-QUIP 30000002 RELEASE LINK FOR EMSCO F / FA / FB / FC 1300 AND 1600 MUD PUMP

REVERSIBLE ENGINE HKC K8RS40FC

46680 PLUG 3 FIG 1502 ANSON PLUG VALVE

G2504/5 3RD STAGE UNLOADER GAS COMPRESSOR W  J TYPE 175

765B479G20 HIGH SPEED PINION GEAR FOR JACKING SYSTEMS

PARKER 03.25 BB2AU14A 5.00 SER.2A AIR CYLINDER MADE IN USA

R431008215 REXROTH QUICK RELEASE VALVE

M/D TOTCO ULTRASONIC PIT LEVEL SENSOR 222573-001

33S-CT4 CYLINDER TUBE FOR HR-33SF

30P210QHRS50NN1195 HIGH PRESSURE HYDRAULIC FILTER PARKER RACOR 30P SERIES 929081

GDB1179295 BRAKE EQUALIZER PIN ASSY NOV 641149A

ECS101183-2202 T3 ENERGY SERVICES PRESSURE TRANSMITTER RANGE 0 TO 15000 PSI

40218041-002 NOV MD TOTCO ULTRASONIC LEVEL SENSOR

Y30126 HAMWORTHY VALVE 4SW80 HIGH PSI COMPRESSOR

PRL-97004-EX 120VAC 50/60 HZ HELIDECK LIGHT

DETCON FP700 COMBUSTIBLE GAS SENSOR

PPL 81802 WARTSILA DIESEL SPEED MEASURING SYSTEM CIRCUIT BOARD

897662-005 HOBART PUMP 00-897662-00005

80600029 NOV NATIONAL OILWELL VARCO SUB ROD HYD 80600031

KHM-32-M60-3312 SS HYDAC BALL VALVE 3103883-1 MADE IN GERMANY 315 BAR

180Z0011 DANFOSS FILTER ELEMENT

40219493-002 REV A PCB MD TOTCO 219494FAB

601118359 CENTRIFUGAL MISSION PUMP SHAFT 1/18 PADISTAL

WY 6560W LIMIT SWITCH WOO YANG M  E CO. 250VAC-10A,IP-56

1600419 PCB CONTROLLER ES GROUND BOARD 2030ES JLG

B02G0000 LOAD MONITOR SLIP DETECTOR B02J0000 TECH POWER CONTROLS

VELAN PROQUIP 3'' 150CL CHECK VALVE PW10-013D10-3DB

VELAN PROQUIP 3'' 150CL CHECK VALVE 013D10-3DB

74919 MOTOR COMPOUND GEAR FOR NOV SSW40 SPINNING WRENCH

K6U-526 ROTARY VALE INGERSOLL RAND

RT 10 D4 30 VICKERS PRESSURE CONTROL VALVE RT10D430

TERASAKI ECB-2141 SENDER MODULE

EMD 8268641 CYLINDER LINER INSERT FOR EMD645 567E EMD645E1 PCS

TERASAKI ECA-804 TM MASTER UNIT  

K6U-337-6, K6U-338-6 RING SETS SUITABLE FOR INGERSOLL RAND LOT OF 108 RINGS

200D310 ROSS HILL CANTROLS CORP CIRCUIT BOARD 0509-2600-00

3021565 LIEBHERR WATER PUMP

DETCON FP700 GAS SENSOR

LS050 LSI WIRELESS ATB SWITCH TRIMBLE / LSI

MC-II CAMERON NUFLO FLOW ANALYZER MC-374273 ( )

04-00152 AIR CYLINDER ASSEMBLY 2000-3100

DU-A574 INGERSOLL RAND BRAKE BAND ASSEMBLY FOR EU  EUL AIR WINCHES

30160384 NOV LOWER DIE HER ASSY R  L 30160383 FOR ST-80 IRON ROUGHNECK

10516 CLIMAX GREASE GUN 15000 PSI

36 HEAVY-DUTY CHAIN WRENCH RIDGID 31330 , 4-1/2-INCH CHAIN WRENCH

2LC0100-6AB FLENDER STANDARD DRIVE COUPLINGS SIZE-140

201M110 VALVE HOUSING GROUP BEEBE AIR TUGGER

ECA-222 TERASAKI ELECTRIC SENDER MODULE

2 1/16 IN 10K QFC MANUAL GATE VALVE REPAIR KIT QFC-210-MGVRK

YZ280313 JOHN DEERE GEAR NOV P/N 949901-1 MADE IN USA

3003-1132 KOOMY PLUNGER 1-38 TYPE 80

RECTIFIER MAIN 66-5840 8313721

INGERSOLL RAND 22033 SEPARATOR PLATE 4

2406437-02-99 CAMERON 2406437-01-99 REPAIR KIT, DRG VALVE, 1/2" 5K PSI WP

116072 PISTON KIT RUPTURE PIN TECHNOLOGY FA12-0774

9A-100003537 NUFLO CAMERON FLOW METER

CT-3477SAY26 INTERNATIONAL LOGGING CURRENT SENSOR

77B8(M2) SIEMENS I/P TRANSDUCER BOOSTED 77B8

P516139 FMC REPAIR KIT ,ULTP010 5000 KIT .88 B REPLMNTS BNO

P516137 FMC REPAIR KIT ,ULTP010 5000 KIT .88 B REPLMNTS BNO

HE407TXT CARD PBA VIDEO OUTPUT CCTV SYSTEM

48-A81-LZ001 QUANTEM (123389-01) COMPRESSOR HIGH TEMPERATURE SHUT DOWN MODULE

C2-825 EATON VICKERS DIRECT ACTING HYDRAULIC RIGHT ANGLE CHECK VALVE

21391271 CYBERBASE FUNCTIONAL TOUCH KEYPAD NOV HYDRALIFT

300/02/010 SECONDARY SCREEN PNEUMOSEAL 300-02-010 NOV BRANDT VSM 300

063920 CIRCUIT BOARD FOR TAYLOR 063922/063928

00-976074 HOBART BEARING PILLOWBLOCK 2 BORE REXNORD LINK BELT PB22432H

ENERPAC P80 ULTIMA STEEL HYDRAULIC HAND PUMP 10000PSI

T6000 DEEPSEA POWER  LIGHT SUPER SEACAM SSC-T6000-55072008B-P

RHS1K0E OHMITE 1kΩ HAND THROTTLE FOR DRAW WORKS  MUD PUMP NOV

7805-001 GAI TRONICS HAZARDOUS AREA HANDSET SPEAKER AMPLIFIER ASSEMBLY

25567-32B21HUR 3D GAUGE NL SHAFFER 0216012 (DD567-32 HUR)

80115-001 COUPLING WARTSILA

CROWCON TCGARD 03ATEX0074 CROWCON FLAMMABLE REPLACEMENT SENSOR 96HD SENSOR

COP3X ELECTROLUX PCB CARD

SL 3003-XX/GS80/K/EEX FSG SEILLANGENGEBER ROPE LENGTH TRANSMITTER

V255 MODEL COMPRESSOR CRANKSHAFT ASSEMBLY P/N.32029282

A7054-160 BASKET GRAPPLE 5" (B2374) 150 OVERSHOT LOGAN OIL TOOLS

A7059-176 BASKET GRAPPLE (9222) 5-1/2" FOR LOGAN SERIES 150 OVERSHOT

B9.06-456RR MANIF BLOCK

25864 SHORT JAW HANDLE FOR HT-65 TONG 10377704-001 NATIONAL OILWELL VARCO

HWFB SYSTEMTECHINK MK20-98-SUN-T/LH TWO WAY SOLENOID VALVE

DANFOSS EKS 65 EXPANSION VALVE CONTROLLER CODE NO.084H3025

73085 ROLLER COMPOUND GEAR FOR NOV SSW40 SPINNING WRENCH

P516137 FMC REPAIR KIT ULTP010 5000 KIT .88B LOW TORQUE VALVE 1"

FA-4C-1F FUJI PNEUMATIC TOOL 13500 RPM

FA-180K-2R FUJI PNEUMATIC TOOL 8000 RPM

OEMC-10P ICS ADVENT RACK ASSEMBLY WITH PC BOARD ASSY 15008-02

R978726623 CALVE ASSEMBLY CANTROL TYPE "N"

37004538 INGERSOLL RAND PISTON AIR

SWAGELOK SS-4R3A5-NE 1/4 IN HIGH PRESSURE PROPORTIONAL RELIEF VALVE

T-300GCX-120 AUDIO CONNECTOR 120VAC FEDERAL SIGNAL

480194200 FORUM DRILL PIPE FLOAT VALVE TYPE FLAPPER AUTOMATIC SIZE 4R MODEL GC

RETSCO 36003-01 SUB ASSEMBLY PISTON FOR RETSCO RELIEF VALVE

SIEMENS SITRANS PROBE LU 7ML52211DB17 ULTRASONIC LEVEL TRANSMITTER 7ML5221-1DB17

04-00152 AIR CYLINDER 2000-3100

69488-102 GAI TRONICS PCB CARD

3:1 SAMOA OIL PUMP

3:1 SAMOA OIL PUMP AIR OPERATED

TRIO-PS/1AC/24DC/20 PHOENIX CONTACT POWER SUPPLY UNIT

HU-556 INGERSOLL RAND THROTTLE LEVER (REPAINTD)

MT1H-M251-A BARKSDALE TEMPERATURE SWITCH

NOV 0000-7497-01 POWER LIMIT CONTROLLER 3 PHASE

961274-58 SPRAG CLUTCH ASSEMBLY MADE IN USA

MITEL MP914AD POWER CONVERTER

ORLACO PANEL - 0504761 ORLACO ORL 43-B

0W2961 TRANSFORMADOR ELECTROLUX PROFESSIONAL ENO21063/471 9550-59