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。

NSTPB1P6BC1 Motor Controllers Class 10 3P 1-1.6A 600V 50/60Hz 3Ph

  ELC-PB14NNDT Programmable Logic Controllers (PLCs) Programmable Logic

 NSIOC-16DI Programmable Logic Controllers (PLCs) Input Module 4mA 24V

Joslyn Clark Controls  2438 Hter Packs and Elements

Multivac  SF-421418 PLC Cables/Connectors/Accessories Control Terminal

  SY-E4-UC-16RE1 Programmable Logic Controllers (PLCs) 24V

Lithonia Lighting  ELP-L015 Light Switch and Control Accessories

Joslyn Clark Controls  100T-JS5B Selector Switches

Barber Colman Co.  TC-115 Room Thermostats

Carlo Gavazzi  TAD2-250-5A Control Transformers

  SY12-AC-RC Programmable Logic Controllers (PLCs)

  C441P-GR1 Programmable Logic Controllers (PLCs) Modbus Communication M

 USD ELC-CAENET Programmable Logic Controllers (PLCs) 24V

  C320MH3WA0 Auxiliary Contact Control Module Kit  Mechanically Held

  AE16ENS0 Non-Reversing Starters Motor Control Starter 25A 1Ph

 NSTPAXUVR230V50H Other Motor Operation and Control

 USD EU5C-SWD-EIP-MODTCP Programmable Logic Controllers (PLCs)

Carlo Gavazzi  TAD2-1005A Control Transformers

  HT8FBRAFL3 Motor Controllers Illuminated 24V 1NO 2 Position Red NEMA 3

Kichler 371082 Light Switch and Control Accessories

  ELC2-PB14NNDT Programmable Logic Controllers (PLCs) I/O Module 24V 4 I

  C440-QCP Programmable Logic Controllers (PLCs)

Wattstopper  EOSW-112-W Light Switch and Control Accessories

Acuity Controls  CM-PDT-10-R Other Sensors and Switches

  M22S-R10KQ Float and Level Control Switches

  ELC-EX16NNDN Programmable Logic Controllers (PLCs) ELC Expansion 24V 1

Hubbell  WSS-1277 Light Switch and Control Accessories

Rowan Controls  2190-E42AA

Lutron  QSWS2-5BRLI-WH-E01 Lighting Controls

Lutron  QSWS2-2BRLI-WH-E01 Lighting Controls

Crouse Hinds  10250TBG Control Panels and Accessories

 NSIOC-16DI-AC110 Programmable Logic Controllers (PLCs) 110V

  ELC2-PB12NNDP Programmable Logic Controllers (PLCs) Programmable Logic

Thomas & Betts  MS212C Light Switch and Control Accessories

  ELC-PS01 Programmable Logic Controllers (PLCs) 1A 240V

  ELC-EX08NNNR Programmable Logic Controllers (PLCs) 1.5A 24VDC 50/60Hz

  ELC-CARS485 Programmable Logic Controllers (PLCs)

Nora Lighting  NLPR-RGBWCONT Other Lighting Switches/Contactors/Controls

Allen Bradley  800T-N10 Other Motor Operation and Control

 NNIOC-16DI-AC110 Programmable Logic Controllers (PLCs) 110V

  EU5E-SWD-4D4D Programmable Logic Controllers (PLCs) 0.5A 24VDC 8 input

Wattstopper  WS-277 Light Switch and Control Accessories

  PXES4P24V Programmable Logic Controllers (PLCs) Ethernet Switch 120V 4

 NSTRE10B40TD Other Contactors IEC Control Relay 4P 48 24V 50/60Hz

Hubbell  HBL320P4W Light Switch and Control Accessories 20A 125V

RIB Functional Devices Inc.  RIBMNLB-6 Programmable Logic Controllers (PLCs)

Automatic Timing and Controls  3-0329A366Q1X Time Delay Relay 5A 120V

  PXES4P24V Programmable Logic Controllers (PLCs) Ethernet Switch 120V E

CONTROL CONCEPTS  D-DIN32R Surge Protection Devices (SPDs)

  ELCB-PB14NNDR Programmable Logic Controllers (PLCs) 14-I/O ELCB PLC

Hubbell  HBL1556L Other Lighting Switches/Contactors/Controls

Nora Lighting  NLPR-DWC-RGBWCONT Other Lighting Switches/Contactors/Controls

  SWD4-SML8-20 Programmable Logic Controllers (PLCs)

  M22-C2-M2V Control Panels and Accessories

Wattstopper ELCU-200 Light Switch and Control Accessories

1  Wattstopper ELCU-200 Light Switch and Control Accessories

  SY-E4-AC-16RE1 Programmable Logic Controllers (PLCs) Extension Modul

Leviton  VRCS1-1LZ Light Switch and Control Accessories

  DXA-EXT-3RO Motor Drives/VFDs/Speed Controllers

Optimation Inc.  SF-429217 Programmable Logic Controllers (PLCs)

 M22-LED230H-B Light Switch and Control Accessories

 NSTCEXSBN11 Auxiliary Contact Motor Control 2P 10A 1NO 1NC

Acuity Controls  WSXA-PDT-WH Other Sensors and Switches

Comtrol Corporation  SF-409123 Programmable Logic Controllers (PLCs) ISA

Hubbell CU120A Light Switch and Control Accessories

  SY-E4-DC-4PE1 Programmable Logic Controllers (PLCs) Extension Module

Crouzet  SM-IAC5 Programmable Logic Controllers (PLCs) 30VDC

  ELCM-EX08NNNR Programmable Logic Controllers (PLCs) Programmable Logic

  ELCM-EX16NNDN Programmable Logic Controllers (PLCs) Programmable Logic

  MMX-REMKEY-TEXT Programmable Logic Controllers (PLCs) Text Keypad

 M22M-W Other Lighting Switches/Contactors/Controls

Honeywell  Q651A1009 Other HVACR Controls and Thermostats

Thomas & Betts  PB416A Light Switch and Control Accessories

  H1235 HVACR Replacement Parts

Carrier  SF-408446 Programmable Logic Controllers (PLCs) Display w/ Circuit B

  H2107B-3 HVACR Replacement Parts

Square D  9001BG107 Control Panels and Accessories

Hubbell  ATD1000C Other Lighting Switches/Contactors/Controls

Leviton  ODC0P-W Other Lighting Switches/Contactors/Controls

Acuity Controls  CMRB10 Occupancy Switches

TELCO  LR100NG5 Other Lighting Switches/Contactors/Controls

CONTROL CONCEPTS  I-201 Programmable Logic Controllers (PLCs)

Acuity Controls  MP20 Other Power Supplies 20A 277V

Leviton  VRS15-1LZ Light Switch and Control Accessories

 NSTRM10A22A Miniature Control Relay 4P 110/120VAC 50/60Hz

 M22 S-WLKV-Y Light Switch and Control Accessories

Precision Multiple Controls  P3-275 Proximity and Photoelectric Switches

Acuity Controls  PTS-60-WH Other Sensors and Switches

  86-2588 Control Panels and Accessories

Ripley  6390-FAA Light Switch and Control Accessories

  DX-SPL-RJ45-2SL1PL Motor Drives/VFDs/Speed Controllers

Tpi  TBD Other HVACR Controls and Thermostats

 Tpi  TBD Other HVACR Controls and Thermostats

Wago  2789-9080 Programmable Logic Controllers (PLCs)

  HT8AAHAB Motor Controllers Non-Illuminated 1NO 1NC Black NEMA 1, 2, 3,

Datalogic  93ACC0227 Light Switch and Control Accessories

  ELCM-EX08NNDN Programmable Logic Controllers (PLCs) Programmable Logic

Acuity Controls  PTS-720-GY Other Sensors and Switches Time Switch 277V Gray

Thomas & Betts  MS206C Light Switch and Control Accessories

Thomas & Betts  A863D Control Panels and Accessories Mud

Kichler 337012IV Light Switch and Control Accessories

Whitman Controls  P119G-25H-K12TB Other Sensors and Switches Pressure Switch

Hubbell  UL924SR2 Light Switch and Control Accessories

Nora Lighting  NLPR-ZONECONT Other Lighting Switches/Contactors/Controls

Acuity Controls  LSXR-10 Sensor and Switch Accessories

THOMAS & BETTS  FS112C Light Switch and Control Accessories

Idec Izumi Corporation  PS5R-A05 Other Motor Operation and Control

Acuity  LITH-DLL127F-1.5-JU Bulb/Ballast/Driver Accessories LED Control 277V

Hubbell  P2613-30 Other Lighting Switches/Contactors/Controls

  M22-SWD-I3-LP01 Programmable Logic Controllers (PLCs)

Kichler 337010ALM Light Switch and Control Accessories

  E22LED612YN-GR Other Lighting Switches/Contactors/Controls

  H1229 HVACR Replacement Parts

Leviton  6299 Other Lighting Switches/Contactors/Controls

Square D  TSXRAZ01 Programmable Logic Controllers (PLCs) 5

  ONW-D-1001-MV-N-G Light Switch and Control Accessories

Kichler 337010WH Light Switch and Control Accessories

Acuity Controls  NPOD-KEY-WH Other Sensors and Switches

Precision  P7275 Other Lighting Switches/Contactors/Controls

Ohmite  5001E Control Panels and Accessories

KB Electronics  KBWC-15 Motor Controllers

 KB Electronics  KBWC-15 Motor Controllers

Lutron  MA-S8AM-WH Lighting Controls

Lutron  NTV-1000 Lighting Controls

  DMK Control Panels and Accessories

Hubbell  1223W Other Lighting Switches/Contactors/Controls

Leviton  5627-I Light Switch and Control Accessories

Hubbell  6018 Light Switch and Control Accessories

  C22S-WK-K10 Motor Controllers Selector Switch 1NO Black/White Push But

Icc  ICMPP12V5E Control Panels and Accessories

Elastimold  20MAGBG Control Panels and Accessories

Hubbell  CS1223BU Light Switch and Control Accessories