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
Schneider TPRSS065 TeSys island Direct online SIL starter, 65A AC-3, 30kW / 40HP
Schneider TPRSS080 TeSys island Direct online SIL starter, 80A AC-1, 37kW / 40HP
Schneider TPRST065 TeSys island Direct online SIL starter, 65A AC-3, 30kW / 40HP
Schneider TRV00217 (Pack of 10) stacking connectors for communication interface
Schneider TWDAMM3HT Twido analog I/O module - 2 inputs, 1 ouput 0-10V, 4-20 mA
Schneider TWD-DRA8RT
SCHNEIDER TWDLCAE40DRF
Schneider VW3A3601 Altivar EtherCAT communication module, 2 connectors RJ45
Schneider VW3M5D6AR30 Lexium power cable 3m shielded 4x 6mm², BCH2 MIL connector
Schneider VX4A381
Schneider XB4FA3351 Push button, spring return, black flush, marked DOWN ARROW
Schneider XPSVNE3442HSP Preventa zero speed detection, 115VDC motor power supply
Schneider XVC6B55S Complete pre-wired tower light with buzzer, 24V AC/DC
Schneider ZB4BS94412 emergency stop mechanism, Ø40 mushroom red button head, key
SCHNEIDER ZB4BV013
Schneider ZB4FL434 Flush mounted projecting push button head, marked STOP, Ø30mm
Schneider ZB5AP4 Push button head, plastic, projecting, red, Ø22, spring return
Schneider ZB5AW0G45 red light block with body/fixing collar with integral LED
Schneider ZB5FJ7 flush mounted black selector switch, long handle, 3 positions
Schneider ZB5FK1413 Head for illuminated selector switch, white handle, 30.5 mm
Schneider ZB5FK1443 Head for illuminated selector switch, red handle, 2-position
Schneider ZB5FL3 flush mounted green projecting push-button head
Schneider ZB5FL5 flush mounted yellow projecting push-button head
SCHOENROCK 221580 ALARM BELL FOR WATERTIGHT SLIDING DOOR
SCHOENROCK 240420 MICRO SWITCH FOR REVERSING SLIDE VALVE SEK 101/M20.S
SCHOENROCK HYDRAULIK 221550 PRESSURE SWITCH
SCHOTTEL 1144588 DCM STEERING CONTROL MODULE
SCHROFF 13100122 MAX 312 POWER SUPPLY
SCHROFF TPS 5/10 T-12 SWITHPAC - TRIPLE 100W
SCHUBERT SALZER 7010/032V1020212-7 ANGLE SEAT VALVE
SCHUNK 0301478 IN80/S-M8 PROXIMITY SWITCH PLUS ANGULAR PLU WITH 3M CABLE
SCHUNK 0301510 INDUCTIVE PROXIMITY SWITCH
SCHUNK 0301588 INDUCTIVE PROXIMITY SWITCH 24VDC IN 80/0-M12
SCHUNK 0305350 KONEX H50 LINEAR UNIT
SCHUNK 0305450 SWIVEL UNIT
SCHUNK 0340061, MPG 32 IS 2 FINGER PARALLEL GRIPPER FOR SMALL COMPONENTS
SCHUNK 0354221 OSE-C22-0 PNEUMATIC ROTARY ACTUATOR
SCHUNK 304354 DPG+160-2-AS Parallel Gripper
SCHUNK 9646153 DECKEL KONEX P50
SCHUNK 9942391 SWO-R19R-K Electrical Feed-through Module, SWO-E series
SCHUNK GEMOTEC LM200-H75/100 PNEUMATIC LINEAR AXIS LINEAR MODULE
SCHUNK GEMOTEC PNEUMATIC LINEAR AXIS LINEAR MODULE
Schurapneumatic ORIGA / BOGE compressors sensor XSPN 05-122
SCHUT DIAL BORE GAUGE RANGE 160-250MM 0.01MM
SCHWEITZER SEL-2505 REMOTE I/O MODULE 2505363XX
SCIENTIFIC DEVICES SD-401 PROCESS CONTROLLER
SCONI NC SCONI-DSC-ACX SIGNAL INTERFACE MODULE
SCU-11B PCB CARD
SDR-120-24 Mean Well
SE 11.06.120 T 26 PCB CARD SE 11.12.3
SEA TEL 115252 PEDESTAL CONTROL UNIT 115444 REV H
SEA TEL 115252-1 PEDESTAL CONTROL UNIT 115444-8
SEA TEL 116321-2 BLDC SERVO AMPLIFIER PCB MODULE 116785
SEA TEL 116466 2-CHANNEL ROTARY JOINT REV H
SEA TEL 124812 REV.C DAC 2200 ANTENNA CONTROL UNIT CARD 124813-1 REV.N
SEA TEL MDL MPC-1 CONTROL BOARD 108810-B
SEAEYE MARINE 6059 MULTIFUNCTION I/O CARD REV 00
SEAGATE ST3096A HARD DISK
SEAGATE ST4702N
SEALANTERN SLT-09A DEWATERING CONTROL SYSTEM
Seals Product Piston Quic 7110-925
SEAMATE BNWAS OPERATING PANEL
SEASONIC SS-300H1U ACTIVE PFC POWER SUPPLY
SEATECHNIK AS9038-1-2 POWER SUPPLY PCB CARD B003-12106
SEATECHNIK AS9050-0-2 ELECTRIC MODULE ESD PCB CARD CB9050
SEATECHNIK AS9051-0-4 TELECOMMS SW BD PCB CARD CB9051
SEATECHNIK AS9201-0-2 INTERFACE PCB CARD CB9201
SEATECHNIK AS9204-1-4 ANALOGUE MOTHERBOARD PCB CARD CB9204
SEATECHNIK CB9201 INTERFACE PCB CARD
SEATECHNIK CB9205 CSSL AM MOD DEMOD PCB CARD AS9205-2-2
SEATECHNIK GUI-8856-V0-831 GRAPHICAL USER INTERFACE
SEATECHNIK SSL-MISC-03 FIBRE OPTIC CLEANING KIT
SEATEL 116024 SHIELDED POLANG AUX RELAY ASSEMBLY REV J
SEATEL 123845-1 REV.D 123840 REV.A 123843 REV.A PCU ENCLOSURE ASSEMBLY
SEATEL 126864 REV. D TERMINAL MOUNTING STRIP PCB CARD 126865-1 REV. G
SEATEL COBHAM 134735-1 IMA ICU CONTROL UNIT 135577
SEATEL TAC-92 ACU PCB CARD 112227 REV. G 113275-I
SECTOR SB7390
SEEMATZ 70.297/3 CONNECTION PRINT PCB CARD
Seg Panel Control Type: CMP1-120
Seidel Digifas 7003 / 3x400 1.8 kVA
Seifert Heat Exchanger Type: RK-2114 AM / 230V - 10 Bar
SEIKO 802-4 PCB CARD
SEIKO PRECISION QC-6M3 QUARTZ CRYSTAL MASTER CLOCK
SELCO B6300-10 PCB CARD OVERCURRENT TME UNIT
SELCO LITTELFUSE T2000.0020 REVERSE POWER UNIT T2000
SELCO M1500 PT100 6 WAY TRANSMITTER M1500.0010
SELCO M2000-29-00 ENGINE CONTROLLER
SELCO M3000-30-00 ANALOGUE ALARM MONITOR M3000
SELCO M4700 ALARM INDICATOR PANEL M4700-00
SELCO M8100 SYNCHROSCOPE METER M8100-02
SELCO NWS M1000 ALARM MONITOR
SELCO S6000 SIGMA IO/P MODULE S6000.0010
SELCO S6500 SIGMA UI MODULE
SELCO T2000.0020 REVERSE POWER UNIT T2000
SELCO T2200.0010 3-PHASE OVER-CURRENT RELAY T2200
SELCO T2500.0080 3-PHASE SHORT CIRCUIT + OVER CURRENT UNIT T2500
SELCO T2500-12 3-PHASE SHORT-CIRCUIT + OVER-CURRENT RELAY T2500
SELCO T3200 INSULATION MONITORING RELAY T3200-00
SELCO T4500-01 AUTO-SYNCHRONIZER T4500
SELCO T4800.0010 LOAD SHARER T4800
Selectron / Selecontrol PU 300 Programmer
SELECTRON / SELECONTROL PU 300 PROGRAMMING DEVICE
SELEMA 09 F1 B3 1836,9XF1B31836,SERVO DRIVE F1 200 (F1 FORMULA) 230VAC,4.7KW,18A
SELO JJGC NO 3 PCB CARD
SEM HR142J6-88S SERVO MOTOR, 530V, 25nM, 6000RPM, 125A, IP64/65
SEM HRS115E6-88S SERVO MOTOR
SEM SERVO MOTORS MT30M4-24
SEMCO 8-1000/220-3 HEATING ELEMENT INDICATOR
SEMCO EMS-1005 HEATING INDICATOR PCB CARD 700.021.001
SEMCO EMS-25 THERMISTOR RELAY PCB CARD 700.021.000
SEMCO IM2 M.OHM TIMER
SEMCO LEVEL INDICATOR CLOSED TYPE LEVEL GAUGE
SEMCO LIQUID LEVEL INDICATOR 0-250 CM
SEMCO MARINE EMS-145 EMS-235 EMS-25 MS-1005 MEMO EMS-600 RACK MODULE 700.040.000
SEMCO MARINE MASTER CLOCK
SEMCO MARITIME IM2-L INSULATION MONITOR 1192780
SEMI POWERTEK PW-30D SWITCHING MODE POWER SUPPLY
SEMIKRON SEMIPACK3 SKKT 273/16E THYRISTOR MODULE
SEMIKRON SKBa B500/445-4
SEMIKRON SKIIP83AHB15T1
SEMIKRON SKKT 27/12
SEMIKRON SKM 75 GAL 123 D
SEMIKRON SKM40GD124D
SEMIPACK SKKT 26/12
Semtech BBC-2,50-AG / M3 / 2,5mm² / 16 Pieces - Socket Contact Crimp
Semtech BBC-2.50-AG / M3 / 2.5mm2 / 16 pieces - socket contact socket crimp
Semtech SBC-1,50-AG / M3 / 1,5mm² / 23 Pieces - Socket Contact Crimp Pin
Semtech SBC-1.50-AG / M3 / 1.5mm2 / 23-Piece - Female Contact Female Crimp Pen
SENKO SGT H2S PORTABLE SINGLE GAS DETECTOR SGT SERIES SP-SGT-H2S
SENSE-WARE UV/IR FLAME DETECTOR TEST LAMP WITHOUT BATTERY