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。
Cisco WS-C3750G-48TS-S 48 Port 10/100/1000 4 SFP Gigabit Stackable Switch, 1U
Cisco NIM-2FXO 2-Port Voice/Fax Network Interface Module for ISR 4000 Series
CISCO NME-16ES-1G-P 16-PORT 10/100 PoE ETHERSWITCH PLUG-IN MODULE 1-PORT GIGABIT
Verizon Yealink SIP-T41P Ultra-Elegant 6 Line 2 Port 10/100 PoE VoIP
Verizon Yealink SIP-T41P Ultra-Elegant 6 Line 2 Port 10/100 PoE VoIP
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Cisco CP-9971-C-K9 ified IP Ph9971 6 Line Color Touchscreen USB SIP
Eaton SI061-W Full Slide Dimmer Single Pole with Non-Preset White Pack of 10
Cisco CP-7965G 7965 ified IP Phone, Color 5-Inch TFT Display, VoIP
APC AP9631 NMC AP9630 Network Management Card 2 Environmental Monitoring No Prob
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APC AP9631 NMC AP9630 Network Management Card 2 Environmental Monitoring No Prob
Motorola AP-0650-60010-US AP-650 Single Radio Internal Antenna Access Point
Cisco Meraki MS220-24P 24x 10/100/1000BASE-T PoE 4x SFP Cloud Managed Switch
Cisco Meraki MS220-24P 24x 10/100/1000BASE-T PoE 4x SFP Cloud Managed Switch
Cisco Meraki MS22P MS22P-HW 12x 10/100/1000 PoE 4x SFP Cloud Managed Switch
AudioCodes IP445HDEG-BW 445HD 6 Line 4.3" Color LCD Screen VoIP Phone
AudioCodes 430HD UC430HDEG 6 Line Gigabit IP PhSIP
AudioCodes 440HD IP440HDEG 400 Series 6-line executive VoIP phSIP
AudioCodes UC405HDEG 405HD 2 Line 4 Soft Keys VoIP PhSkype SIP
Cisco GLC-SX-MMD 1000Base-SX SFP mini-GBIC Transceiver Module
Cisco PWR-3845-AC-IP PoE Cisco 3845 AC-IP 660W Power Supply
Cisco1805-D Cisco 1805-D Fixed Service Router HWIC-4ESW HWIC-CABLE-D-2
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Lot of 10 Cisco CP-7945G 7945 ified IP PhColor LCD 5-Inch TFT Display VoIP
Cisco SM-SRE-910-K9 1TB HDD 4GB RAM 1Gig Control Processor Module for Cisco 3900
Cisco 2911-FANASSY Fan Assembly Tray for Cisco 2911 Integrated Services Router
Cisco CP-WB-HANDSET Cisco Handset For 7900 Series VoIP
CISCO SFP-OC12-SR GENUINE OC-12/STM-4 SHORT-REACH (2km) TRANSCEIVER
CISCO SFP-OC12-MM GENUINE OC-12/STM-4 SHORT-REACH(2km) 1310nm, MMF
CISCO SFP-OC48-SR GENUINE OC-48c/STM-16 SHORT (2km) TRANSCEIVER 1310nm
CISCO SFP-OC3-SR GENUINE OC-3/STM-1 SHORT-REACH(2km) 1310nm, LC
CISCO SFP-OC3-IR1 GENUINE OC-3/STM-1 INTERMEDIATE-REACH(15km) 1310nm LC
Cisco HWIC-3G-CDMA-V 3G Wireless WAN HWIC 3.1 Mbps Modem Interface Card
Datamax DPO78-2774-01 51-2278-00 Main Logic Board for DMX-I-4208 Parallel/Serial
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ZEBRA 46937 Clear Media Door Panel For Zebra 90 96 110 140 170 220
Cisco1941-Sec/K9 1941 2 onboard GE, 2 EHWIC slots, 1 ISM slot 512MB/256MB Router
Yealink SIP-T28P 6 Line 2x 10/100 PoE HD Voice Executive IP PhSIP
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Yealink SIP-T28P 6 Line 2x 10/100 PoE HD Voice Executive IP PhSIP
Cisco2811 WIC-1DSU-T1-V2 2-Port 10/100 Integrated Services Router 256D/64F
Cisco2811 WIC-1DSU-T1-V2 2-Port 10/100 Integrated Services Router 256D/64F
Zebra P1008212 28322 S4M Main Logic Board 64MB USB Serial Thermal Printer
Cisco 3900-FANASSY 800-30098-02 Fan Assembly for 3925/3925E/3945/3945E Router
Cisco WS-C3850-48P-L Catalyst 3850 Gigabit PoE Switch Replacement Chasity Only
Cisco WS-C3850-48P-L Catalyst 3850 Gigabit PoE Switch Replacement Chasity Only
Cisco DMP-PRCASE-4310-S1 Protective Case Series 1 Moting kit for AV receiver
Cisco828 4-port 10-Mbps Ethernet hub 2-wire G.SHDSL Integrate Service Router
CISCO NME-XD-48ES-2S-P 48-PORT 10/100 PoE ETHERSWITCH PLUG-IN MODULE 2- SFP
Cisco PWR-2911-AC 341-0235-07 2911 AC Power Supply 190 Watt for Cisco2911 Router
Cisco CP-7937G IP Conference-Station 7937 Video Conferencing VoIP Phone
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Cisco CP-7937G IP Conference-Station 7937 Video Conferencing VoIP Phone
Intermec 1-971166-900 1-971166-002 Power Supply Complete it PD41 PD42 Printer
Intermec EasyCoder 1-207132-001 Control Panel Model Complete it PD42 Printer
APC AP9630 NMC Smart-UPS Network Management Card 2 Firmware V7.0.4 -No Cable
APC AP9630 NMC Smart-UPS Network Management Card 2 Firmware V7.0.4 -No Cable
Zebra P1008212 28300 S4M Main Logic Board 64MB USB Serial Thermal Printer
Cisco AIR-CAP3702I-B-K9 Aironet 3700 Dual Band Wireless Access Point WiFi MiMo
Cisco AIR-CAP3702I-B-K9 Aironet 3700 Dual Band Wireless Access Point WiFi MiMo
Cisco AIR-CAP3702I-A-K9 Aironet 3702I Dual-Band Wireless Access Point Mi-Mo WiFi
Cisco AIR-CAP3702I-A-K9 Aironet 3702I Dual-Band Wireless Access Point Mi-Mo WiFi
Cisco GLC-T Genuine 1000Base-T Copper SFP Gigabit Transceiver
CISCO ASA-180W-PWR-AC AC Power Supply ASA5510/20/40/50 341-0094-01 02 03
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Cisco HWIC-D-9ESW 9-port 10BASE-T/100BASE-TX Ethernet Switch Router Module
Cisco C3900-SPE100/K9 Services Performance Engine 100 for Cisco 3925 ISR
1 Cisco C3900-SPE100/K9 Services Performance Engine 100 for Cisco 3925 ISR
Cisco CP-8845-K9 8845 5 Line VoIP 5inch LCD Video Ph2 Port 10/100/1000
Cisco CP-8845-K9 8845 5 Line VoIP 5inch LCD Video Ph2 Port 10/100/1000
Cisco WS-C2960-24-S Catalyst 2960 24 Port 10/100Base-T Fast Ethernet Switch
1Cisco WS-C2960-24-S Catalyst 2960 24 Port 10/100Base-T Fast Ethernet Switch
Cisco CP-6921-C-K9 ified VoIP Desktopice 2-Line PhSCCP/SIP Protocol
Cisco CP-6921-C-K9 ified VoIP Desktopice 2-Line PhSCCP/SIP Protocol
Cisco CP-6921-W-K9 6921 2 Line VoIP PhSCCP SIP White Base Only
Cisco Meraki MR42 Dual-band 802.11ac Wave 2 Wireless Access Point
CISCO SFP-OC3-MM GENUINE OC-12/STM-4 SHORT-REACH (2km) 1310nm MMF
Datamax DPR78-2853-02 51-2450-11 Main Logic Board DMX-E-4205
1 Datamax DPR78-2853-02 51-2450-11 Main Logic Board DMX-E-4205
Zebra G29600M 34146 S4M Stripe Printer Internal Replacement 24V Power Supply
1 Zebra G29600M 34146 S4M Stripe Printer Internal Replacement 24V Power Supply
Cisco CP-7962G 7962G 6 Button VoIP PoE SCCP
Intermec 1-207039-900 Control Panel Module Complete it PD41 Printer
Cisco Meraki MR16 Cloud Managed PoE Dual-Radio 802.11n Wireless Access Point
30 day , Fast Delivery
Cisco Meraki MR16 Cloud Managed PoE Dual-Radio 802.11n Wireless Access Point
Cisco HWIC-16A 16-Port Asynchronous WAN Interface Compatible 2800/2900/3800/3900
PDi Commication Systems PD168-055 Enclosure GWN Power Supply Kit
Cisco CTS-PHD-USB CTS-PHD-CAM-USB 2.7 MP 1280 x 720 Web Cam USB
Cisco CP-7971G-GE 8 Button (Line) VoIP Color LCD Touch Screen Gigabit Phone
Cisco WS-C3750-48TS-E Catalyst 3750 48-Port 10/100 4 SFP Uplinks Stack Switch
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Brocade Mobility 650 BR-AP065066030US Dual Radio Wireless LAN Access Point RE
Electro Magnetic Door Her MDH102 Aluminum/Duro with Program Board Basic it
Cisco CP-7970G 7970G SCCP 8 Button (Line) VoIP Color LCD Touch Screen IP Phone
Cisco CP-7970G 7970G SCCP 8 Button (Line) VoIP Color LCD Touch Screen IP Phone
Cisco CP-7937-MIC-KIT Optional MicrophKit IP Conference Station 7937G
Lot of 10 Cisco GLC-SX-MM Genuine 1000Base-SX Fiber SFP Gig Transceiver
1 Lot of 10 Cisco GLC-SX-MM Genuine 1000Base-SX Fiber SFP Gig Transceiver
Cortelco 912000TP227M 9120 Single Line Corded Phone
ADTRAN NetVanta 3305 3000 Series 2-Port 10/100Base-T Wired Router 64MB/16MB
Electric Strike Door Lock I-1402D-08 Non Fail Safe 24VDC Reversible Duro
Electric Strike Door Lock Buzzer DC-1402A-08 Non Fail Safe 24VDC Reversible US28
Cisco AIR-AP2802I-B-K9 Aironet AP2802I Dual Band 450 Mbps Wireless Access Point
1 Cisco AIR-AP2802I-B-K9 Aironet AP2802I Dual Band 450 Mbps Wireless Access Point
Cisco N5K-C5020-FAN Nexus 5520 Replacement Spare Fan Tray Module
Cisco CP-8961-C-K9 ified IP Ph8961 5-inch TFT color display 2 USB ports
Cisco N7K-C7010-FAN-F 10-Slot Fabric Fan Tray for Nexus 7000 N7K-C7010 Switch
DATAMAX DPR78-2780-01 LCD Display Buttons DMX-I-4206 4208 4308 4210 4212 4406/04
1 DATAMAX DPR78-2780-01 LCD Display Buttons DMX-I-4206 4208 4308 4210 4212 4406/04
Genesys AudioCodes 420HD IP420HDEG/GNS 2 Line Multi-Lingual VoIP PhSIP
Zebra 77715P 77711 Z4M Plus Z6M Plus Power Supply PCB Board
Zebra G20060M 20060 Genuine S4M Control Panel Board Cable and Keypad
Intermec PM4i 1-971131-002 Power Supply Assembly 1-971031-001 100/240V
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Cisco GLC-SX-MMD 1000Base-SX SFP mini-GBIC Transceiver Module
Zebra G33037M 33031-100 Maint PCMCIA Board Assy 90 96 140 170 220 Printers
Intermec 1-971164-800 1-971064-001 Parallel Card Option PD41 PD42 Printers
Cisco CP-8861-K9 5 Programmable Line Key 5 inch. Color VoIP PhAux USB
Cisco HWIC-3G-GSM High-Speed WAN Card 1800, 1900, 2800, 2900, 3800, 3900 Routers
Cisco CP-DOUBLFOOTSTAND Double Module Footstand for VoIP PhExtensions
Cisco AIR-ANT2430V-R Aironet 3-dBi 2.4-GHz Omnidirectional 802.11 b/g/n Antenna
Intermec 1-971041-001 Parallel Interface Card PM4i PF4i/PF2i PF4Ci PX4i PX6i
Cisco GLC-LH-SM Genuine 1000Base-LX/LH SFP Long-Haul 1310nm Transceiver
Cisco CP-7945G 7945 ified IP PhColor LCD 5-Inch TFT Display VoIP
Cisco CP-8841-K9 5 Programmable Line Key 5 inch. Color VoIP PhSIP
Cisco CP-8831-K9 ified IP Conference PhBase and Control it
Cisco CP-8831-K9 ified IP Conference PhBase and Control it
Cisco CP-7937-MIC-KIT Optional MicrophKit for IP Conference Station 7937G
Zebra 79400-001M 79400-012 Main Logic Board Kit USB ZM400 ZM600 Printer
Eaton WFSW15-C7-SP-L Wi-Fi Smart Switch Brown Black Gray LED Indicator 1-3 Way