福建中立恒自动化设备有限公司

目前，世界上有200多个厂家生产可编程序控制器产品，厂家有德国的西门子，美国的Rockwell(AB)、通用(GE),日本的三菱、欧姆龙，法国的施耐德等。

可编程序控制器总的发展趋势是向高集成度、小体积、大容量、高速度、易使用、高性能方向发展。具体表现在以下几个方面：

(1)向小型化、专用化、低成本方向发展

20世纪80年代初，小型PLC在价格上还高于小系统用的继电器控制装置。随着微电子技术的发展，新型器件大幅度的提高功能和降低价格，使PLC结构更为紧凑，功能不断增加，将原来大、中型PLC才有的功能移植到小型PLC上，如模拟量处理、数据通讯和复杂的功能指令等，但价格不断下降，真正成为继电器控制系统的替代产品。

(2)向大容量，高速度方向发展

大型PLC采用多微处理器系统，有的采用32位微处理器，可同时进行多任务操作，处理速度提高，特别是增强了过程控制和数据处理的功能。另外，存储容量大大增加。

(3)与计算机联系密切

从功能上看，PLC不仅能完成逻辑运算，且计算机的复杂运算功能在PLC中也进一步得到利用，从结构上看，计算机的硬件和技术越来越多地应用到PLC；从语言上看，PLC己不再是单纯用梯形图语言，而且可用多种语言编程，如类似计算机汇编语言的语句表，甚至可直接由计算机语言编程；在通讯方面，PLC与计算机可直接相连并进行信息传递。

(4)发展多样化

可编程序控制器发展的多样化体现在3个方面：产品类型、编程语言和应用领域。

(5)模块化

PLC的扩展模块发展迅速。功能明确化、专用化的复杂功能由专门模块来完成。主机仅仅通过通讯设备向模块发布命令和测试状态，这使得PLC的系统功能进一步增强，控制系统设计进一步简化。

(6)网络与通讯能力增强

计算机与PLC之间以及各个PLC之间的联网和通讯的能力不断增强，使用工业网络可以有效地节省资源、降低成本、提高系统可靠性和灵活性，致使网络的应用有普遍化的趋势。

(7)多样化与标准化

生产PLC产品的各厂家都在大力度地开发自己的新产品，以求占据市场的更大份额。因此产品向多样化方向发展，出现了欧、美、日多种流派。与此同时，为了推动技术标准化的进程。一些国际性组织，如国际电工委员会(IEC)不断为PLC的发展制定一些新的标准，如对各种类型的产品作一定的归纳或定义，或对PLC未来的发展制定一种方向或框架。

(8)工业软件发展迅速

与可编程序控制器硬件技术的发展相适应，工业软件的发展非常迅速，它使系统应用更加简单易行，大大方便了PLC系统的开发人员和操作使用人员。

可编程序控制器的输出信号类型可以是开关量、模拟量和数字量。输出单元从广义上分包含两部分：一是与被控设备相连接的接口电路，另一部分是输出的映像寄存器。

PLC运行时CPU从输入映像寄存器读取输入信息并进行处理，将处理结果放到输出映像寄存器。输出映像寄存器由输出点相对应的触发器组成，输出接口电路将其由弱电控制信号转换成现场需要的强电信号输出，以驱动电磁阀、接触器、指示灯等被控设备的执行元件。

以下链接皆有货

109-5 SEALCO VALVE REPAIR KIT

264076 SPRING CALIBRATION MD TOTCO

SHV50C HYDRAULIC SHUTTLE VALVE BRAND HYDRAULICS

A4FS2FSRA ASSY WETECHNOLOGIS

M50010810 COUPLING HUB, 1 1/4" BORE MAGNALOY COUPLING CO  AS PER PHOTO

CONNECTOR COAXIAL RG6 BNC UNIVERSAL RIG 5

RH60022-1 SEAL RING NOV PART NO.8787

150LF-12A INGERSOLL-RAND STARTER END PLATE

SPAN 0-30” 0-30 PSI 00-449 GAUGE COMBO 30HG-30PSI

3131136 SLEEVE GE 4 1/4  5 1/4

ETS V1-2 KLOCKNER-MOELLER RELAY

417-0454 ROTOR FOR ATLAS COPCO LSS-52-R72 AIR GRINDER

NS11-27 ANVIL SPRING INGERSOLL RAND NS1127

40048968 PISTON COOLING GASKET ELECTRO MOTIVE DIESEL EMD LOT OF 90

EMD 9530063 AIR MOTOR VANE KIT INGERSOLL RAND 10BN-42 PACK OF 5

3CR007 STAINLESS STEEL FOR ELEGANCE JUICE DISPENSER (FITS ESC050E)

6727211 DRAGER REPAIR SPARE PARTS KIT BEUTEL MIT ERSATZTEILEN

10690000060 SEAL KIT FOR HAND PUMP PMI25

02-500-245 MICO SEAL KIT MADE IN USA

8221574 RESISTOR 200 OHM ELECTRO MOTIVE EMD

UDS11UD5RKZ253 SAIA TIMER GC-0020117 SERIE D94

210658 PACKING U 4-3/8 X 3-5/8

UDS11NE1RH SAIA TIMER SERIE D94

40.01.329S EGO THERMOSTAT PROTECTOR 4001329 EGO 5610534540

M460-G MAYTAG TIMER M460-G

M444-G MAYTAG TIMER M444-G 3-07296

7848K1 EATON ROTARY SWITCH

214BS RDI SOCKET RELAY

L1DN226J TOSHIBA CORPORATION CONTROL RELAY 579-82014 A4J

9526863 ELECTRO-MOTIVE WATER PUMP SEAL EMD LOT OF 6

ML50K-445 INGERSOLL RAND GASKET LOT OF 10

40041875 GASKET EMD AIR MOTOR GEAR CASE 0

9413285 EMD RETAINER RING FOR AIR MOTOR SHIFT RING LOT OF 9

C-075 SET SCREW COLLAR C-SERIES IN THE CLIMAX

EV9601-23 EVERPURE WATER FILTER CARTRIDGE REORDER EV960123

263068 HOBART WIRE RESISTOR

58612 SQUARE D OVERLOAD RELAY THERMAL UNIT AR 35.0

CC87-7 SQUARE D - HEATER ELEMENT

0320101 CHECK VALVE KEPNER PRODUCTS

UGP-1 HUBBELL KILLARK 20 AMP 125VAC PLUG FOR HAZARDOUS LOCATIONS

100573-001 NUT TRU-SEAL FOR CASING POWER TONG WEATHERFORD LOT OF 10

8017804 IDLER GEAR FUEL OIL PUMP EMD645

100001981 HING SPRING ASSY SELECT-A TONG TOOL

631-1117 KOOMEY TRIPLEX PUMP OIL SEAL CR21098

PWA01CM485A CARLO GAVAZZI 3PHASE LOAD GUARD RELAY

8359758 RESISTOR 15000 OHM ELECTRO MOTIVE EMD

9558969 HANDWHEEL ASSEMBLY ELECTRO MOTIVE EMD

BDM80N2W1.X HYDAC DRYAR, BREATHER FOR OIL STORAGE TANK HYDAC 80

6525-51-0002 BLOCK CONTACT NOV

NRV1-100 COSMOS RESISTOR POTENTIO METER

H2A TIMER OMRON  /

944322 RELIEF VALVE 1/2" NPT VETCO

CPD-8806 DISCHARGE VALVE REPAIR KIT

10-072614-07S AMPHENOL 3-PIN CIRCULAR CONNECTOR

75920 FITTING TEE FOR VARCO SSW40 PIPE SPINNER

XD2PA24 TELEMECANIQUE JOYSTICK

XD2PA24 TELEMECANIQUE JOYSTICK

4516801000 CHARGING VALVE ROSS HILL (F/0100457030 BLADDER)

39125984 SILENCER INGERSOLL RAND

507168S ROBOT COUPE SHAFT SEAL 507168 (ROBOT COUPE R30)

48691 WEAR RING FOR SPECIFIC EQUIPMENT COMPANY MODEL 150 PW1510/PW1503/PW1926

9001SKR9R SCHNEIDER ELECTRIC HARMONY PUSH BUTTON

98504.1001 COMPAIR REAVELL O-RING ASSORTMENT KIT  KIT

SS-BRC-022 ACTUATOR SEAL KIT

DTG63016-33C-CA03 REFRIGERANT FILTER DRIER

APPLETON EFSFR1Q 1-GANG TUMBLER SWITCH

17567-39 GAUGE SIGHT TANK LEVEL

472809902 ELECTROLUX HINGED JOINT LOT OF 6

DLX-101 ELCON G CAPILLARY THERMOSTAT

ARROW PNEUMATIC R354 PRESSURE REGULATOR 8614125JK 83542 RANGE 125 PMAX 300 PSIG

CR305X200A, GENERAL ELECTRIC, CONTACTOR

MT4Y AUTONICS MT4Y-DA-4N MT4 SERIES PANEL METERS

ABB MCBH-10 CONTACT BLOCK LOT OF 10

WL18-2P430 SICK PHOTOELECTRIC SENSOR

00-067500-00118 HOBART O-RING 67500-118 5

6187 POTENTIOMETERS 6187 RIK L1.0

RKP315DB REPAIR KIT  /

32004126 REV D PCB CARD

ECOLAB PWA 9212-2002 VANGUARD CONTROL PCB

14-5116-00108 QUENCHING VALVE R-50.00.139 ELECTROLUX

SIEN-4B-PO-K-L FESTO PROXIMITY SENSOR SIEN4BPOKL

CH604 ENERPAC (DUST CAP) HYDRAULIC QUICK CONNECT COUPLING

ASI--12 PROTRACTOR AUTOMATED MUD SYSTEM

GAI TRONICS 12519-001 REPLACEMENT CRADLE KIT 20080415

12519-002 GAI-TRONICS STATIONARY CRADLE ASSEMBLY KIT 20080625

ALLEN-BRADLEY 800H-NP30 PUSH BUTTONS ENCLOSURE COVER

ALLEN-BRADLEY 800H-NP30 PUSH BUTTONS ENCLOSURE COVER

2 1/2 CMPK-2 SEAL KIT FOR CYLINDER

6N2180 CATERPILLAR GASKET LOT OF 12

31-50047 PISTON AIR PUMP 60:1

CRANKPIN BUSHING 32295875 FOR INGERSOLL RAND COMPRESSOR

M-141 PISTON GASKET FDRIVE UNIT (DU-1) F0151010

9H-6067 ORING CATERPILLAR 9H6067 LOT OF 13

9H-6067 ORING CATERPILLAR 9H6067 LOT OF 13

18-980226 KLAXON MINI MONO P SIREN 24V DC

FRP-95-505-28 INGERSOLL RAND FILTER ELEMENT

NCC MEW 24-0812-3 RELAY BOARD TMW-R1377-010 MCP-R1377-011

71628 ALFA LAVAL FRICTION PAD

1B241-2 HONEYWELL MICRO SWITCH

EATON FD86 FEMALE QUICK COUPLING O-RING KIT FF10593-16

8M-1051 SEAL CATERPILLAR 8M1051 LOT OF 10

3E-6772 SEAL CATERPILLAR 3E6772 LOT OF 10

069137J DAIKIN LOW PRESSURE SWITCH 3SA45028-1/0691374

GB13871-92 OIL SEAL

K6U-514 INGERSOLL RAND PISTON PIN WRIST K6U514

YMV310-MS-3 PUSH BUTTON

6B-6224 FERRULE CATERPILLAR 6B6224 LOT OF 16

VA9716A TRANSMITTOR R 100V

6V-1617 ADAPTER CATERPILLAR 6V1617

COP-04144-018 CON ROD BEARING SHELL (SET OF 8)

GRACO 15T280 - GUN WAND (ITEM AS PER PHOTO)

BGP10S ENERPAC PRESSURE GAUGE 10 TON

229417N TF-500 KIT SPARES (ITEMS AS PER PHOTOS)

S6531-A BRUSH HER LINCOLN ELECTRIC (ITEMS AS PER PHOTOS)

GEORG FISCHER GF 546 1/2" NPT DN15 TYPE 546 VALVE

SME-8-K-LED-24 FESTO INDUCTIVE PROXIMITY SWITCH SME8KLED24

 SME-8-K-LED-24 FESTO INDUCTIVE PROXIMITY SWITCH SME8KLED24

6N-9313 PUMP SEAL CATERPILLAR 6N9313

D01-507 INGERSOLL RAND GASKETS CYLINDER BU7A LOT OF 11

81-RP-110 VALVE REPAIR KIT

SINGER VALVE 106-110 REPAIR KIT 6" 106 RPS

2711933-05-01 SPAN 7500-PSI-G SUBSEA PRESSURE GAUGE 0-7500 PSI 05-4716-T

GC-10.0 DOLE FLOW REGULATOR 34 FEMALE 10.0 GPM

8077938 EMD ELECTRO-MOTIVE COUPLING

ELT248 CURTIS BACK-UP ALARMS 12 TO 48 VDC

LADN22 TELEMECANIQUE AUXILIARY CONTACT BLOCK

INGERSOLL RAND K5B-270 OIL SEAL

INGERSOLL RAND CAPSCREW 71264717 LOT OF 6

INGERSOL RAND 51458 O-RING PARKER

SN022-25 BUSHING

L7020363 CUTTING TOOLS 56B193R02

CN495-1011100-9183-1 FORUM PACKING SET FOR 2 1/16" MANUAL CHOCK VALVE