PLC是以微處理器為基礎，綜合了計算機技術、自動控制技術和通信技術，用面向控制過程面向用戶的“自然語言”編程，適應工業環境，簡單易懂、操作方便、可靠性高的新一代通用工業控制裝置。PLC是在繼電器順序控制基礎上發展起來的以微處理器為核心的通用自動控制裝置。
可編程序控制器是一種數字運算操作電子系統，專為在工業環境下應用而設計。它采用了可編程序的存儲器，用來在其內部存儲執行邏輯運算、順序控制、定時、計數和算術運算等操作指令，并通過數字的、模擬的輸入和輸出，控制各種類型的機械或生產過程。可編程序控制器及其有關的外圍設備，都應按易于與工業控制系統形成一個整體、易于擴充其功能的原則設計。
PLC產品種類繁多，其規格和性能也各不相同。對于PLC，通常根據其結構形式的不同、功能的差異和I/O點數的多少等進行大致分類。
按結構形式分類
根據PLC的結構形式，可將PLC分為整體式和模塊式兩類。
整體式PLC
整體式PLC是將電源、CPU、I/O接口等部件都集中裝在一個機箱內，如圖所示。具有結構緊湊、體積小、價格低的特點。小型PLC一般采用這種整體式結構。整體式PLC由不同I/O點數的基本單元（又稱主機）和擴展單元組成，基本單元內有CPU、I/O接口、與I/O擴展單元相連的擴展口以及與編程器或EPROM寫入器相連的接口等；擴展單元內只有I/O和電源等，而沒有CPU。基本單元和擴展單元之間一般用扁平電纜連接。整體式PLC一般還可配備特殊功能單元，如模擬量單元、位置控制單元等，使其功能得以擴展。
2）模塊式PLC
模塊式PLC將PLC的各組成部分分別做成若干個單獨的模塊，如CPU模塊、I/O模塊、電源模塊（有的含在CPU模塊中）以及各種功能模塊。模塊式PLC由框架或基板和各種模塊組成，模塊裝在框架或基板的插座上，如圖所示。這種模塊式PLC的特點是配置靈活，可根據需要選配不同規模的系統，而且裝配方便，便于擴展和維修。大、中型PLC一般采用模塊式結構。
還有一些PLC將整體式和模塊式的特點結合起來，構成所謂的疊裝式PLC。疊裝式PLC的CPU、電源、I/O接口等也是各自獨立的模塊，但它們之間是靠電纜進行連接的，并且各模塊可以一層層地疊裝。這樣，不但系統可以靈活配置，還可做得體積小巧。
2.2.按功能分類
根據PLC的功能不同，可將PLC分為低檔、中檔、。
WITTENSTEIN GEARBOX ALPHA V-DRV 063 40:1, VDH063-MF1-40-041-OG1MPLB4530K
Wittenstein Alpha VDS 050-MF1-7 -931-0F Servo Worm Gearhead Ratio 7
Wittenstein Alpha TP-050S-MF1-10 Planetary Gear Reducer 10:1 Ratio TP050SMF110
Wittenstein Alpha SPK-075-MF2-5-131-000 Gear Box SPK075MF25131000 1326AB-B430
WITTENSTEIN ALPHA SP-100S-MF2-16-0E1-2S 16:1 PLANETARY GEAR REDUCER B422173
Wittenstein Alpha SP-075S-MF1-7-OE1-2S Multi-Stage Gearhead Ratio i=7
WITTENSTEIN ALPHA SP075S-MC2-16 -1C1-2K-PS1
Wittenstein Alpha SP-075-MF1-2-131-000 Right Angle GearHead SP075MF12131000
Wittenstein Alpha SP-060S-MF1-10-0C1-2S Gear Reducer 10:1 SP060SMF1100C12S
WITTENSTEIN ALPHA SP 140S-MC1-5-1K1-2K-PS1
WITTENSTEIN ALPHA SP 140S-MC1-3 -1K1-2K PS1
WITTENSTEIN ALPHA SP 100X-MC1-7-0G1-2K-KF 7:1 GEAR REDUCER D287303
WITTENSTEIN ALPHA SP 100S-MF2-28-1E1-2S 24MM 32MM 28:1 GEARHEAD REDUCER B464293
WITTENSTEIN ALPHA SP 100S-MC1-3 - 0K0-2K Getriebe Planetengetriebe NEU
Wittenstein Alpha SP 075S-MF1-3-1E1-2S Gearhead 3:1 Ratio 103mm Frame Size
Wittenstein Alpha SP 060S-MF1-5-1B1-2S Gearhead 5:1 Ratio 70mm Frame Size
Wittenstein Alpha SP 060S-MF1-3-1C1-2S Gearhead 3:1 Ratio 70mm Frame
Wittenstein Alpha SP 060S-MF1-3-1B1-2S Gearhead 3:1 Ratio 70mm Frame Size
Wittenstein Alpha SP 060S-MF1-10-181-125 Gearhead 10:1 Ratio 70mm Frame
Wittenstein Alpha SK+100S-MF2-50 Right Angle Gear Head Reducer
WITTENSTEIN ALPHA SK+ 140S-MF1-7 -1K1-P&G
Wittenstein Alpha SK+ 100S-MF1-5 -2H1-1K Getriebe Winkelgetriebe Umlenkgetriebe
Wittenstein Alpha Right-Angle Gear Reducer, 40:1 Ratio
WITTENSTEIN ALPHA RIGHT ANGLE 42 PLANETARY GEAR REDUCER TPK 025-MF3-42-031-000
WITTENSTEIN ALPHA RATIO 7 PLANETARY GEARHEAD SP 140-MF1-7 -421-000
WITTENSTEIN ALPHA RATIO 5 PLANETARY GEARHEAD SP 140-MF1-5 -421-000
Wittenstein Alpha Planetengetriebe TP 010-MF2-91-031-000 - -
Wittenstein alpha Planetengetriebe SP075S-MC2-70-0C1-2K Getriebe #7484
Wittenstein alpha Planetengetriebe SP 060S-MF2-16-0B1-2S Getriebe #7830
Wittenstein Alpha LPK070-M03-25 Servo Planetary Gearhead 25:1 Ratio -
Wittenstein Alpha LPK 090-M02-3-111 Right-Angled Gearhead 3:1 Ratio
Wittenstein Alpha LPK 070-M03-25-111 Right Angle Gear Reducer 25:1 Ratio
Wittenstein Alpha LP-050S-MF1-10-1B1-3S Gearhead LP050SMF1101B13S
WITTENSTEIN alpha LP 155-MO2-50-111-000
Wittenstein Alpha LP 120-M02-16-111-000 Servo Gear Head Reducer
WITTENSTEIN ALPHA LP 090-M01-3-111-001 GEAR REDUCER,
WITTENSTEIN ALPHA LP 070-M02-15-111-000 GEAR HEAD LP070M0215111000
Wittenstein Alpha LP 070-M01-7-111-000 Gearhead 7:1 Ratio 70mm Frame Size
WITTENSTEIN ALPHA LP 070-M01-10-111-000 10:1 GEAR REDUCER POWER TRANSMISSION
Wittenstein Alpha HG+ 100S-MF1-10-6H1-1K00 Right Angle Planetary Gear Reducer
Wittenstein Alpha Gmbh LP070-M01-7-111-000 Gearhead LP070M017111000
Wittenstein Alpha Getriebe TP 050S-MF2-16 OK1-25 --
Wittenstein alpha getriebe SP 140S-MF1-10 -011-25
Wittenstein Alpha Getriebe Kegelradgetriebe SK 060S-MF2-20-1B1-1S10 mit Motor
Wittenstein ALPHA Getriebe alpheno 040-1 i=4 --
WITTENSTEIN alpha Getribe SK.140S-MF 1-3 - 1K1
WITTENSTEIN ALPHA GEARHEAD SP 140S-MF1-7 NNB
WITTENSTEIN ALPHA GEARBOX SP 140S-MF2-16 -1K0-2S
WITTENSTEIN ALPHA GEARBOX SK-1405-MF1-4-0K-1K00 **
Wittenstein Alpha Gearbox
Wittenstein Alpha Gearbox
Wittenstein Alpha Gear Head with shaft. LP 050S-MF1-10-1B1-3S (4 units)
Wittenstein Alpha Gear Box Reducer LPK-090-M02-3-111 Ratio 3:1 Right Angle
WITTENSTEIN ALPHA 7:1 RATIO PLANETARY GEAR REDUCER SP 140S-MF1-7-0K1-2S
Wittenstein alpha 1000mm Mod 2 performance class rack
WITTENSTEIN ALPHA 10:1 RATIO PLANETARY GEAR REDUCER SP 060S-MF1-10-0B1-2S
WITTENSTEIN ALPHA 090-MO1-10-111-000 RATIO:10 10000967 GEAR REDUCER
Wittenstein Alpha -- SP 060S-MF1-5-1B1-2S -- High Speed Gear Reducer ()
Wittenstein Alpha -- SP 060S-MF1-5-1B1-2S -- High Speed Gear Reducer ()
WITTENSTEIN alpha - Planetengetriebe SP MF-Version i=4 - SP 140S-MF1-4 -4K1-2S
Wittenstein / alpha Planetengetriebe SP075S-MF1-5-1G0-2S OVP
Wittenstein / alpha Planetengetriebe SP 075S-MF1-10-0E0-2S OVP
Wittenstein / alpha Planetengetriebe SP 075S-MF1-10-0E0-2S NOV
Wittenstein / alpha Planetengetriebe SP 075S-MF1-10-0E0-2S GEB
Wittenstein / alpha Getriebe HG+ 075S-MF2-20-6C1-1S10 20034772 OVP
WIREMASTER FIT-221-1/8 TUBING, HEATSHRINK,IN=RL, 45 FT ALPHA WIRE
WIRE, YEL, 32AWG, 7/40AWG, 30.5M MPN: 2840/7 YL005 ALPHA WIRE
WIRE, YEL, 28AWG, 7/36AWG, 30.5M MPN: 3048 YL005 ALPHA WIRE
WIRE, YEL, 28AWG, 19/40AWG, 30.5M MPN: 2842/19 YL005 ALPHA WIRE
WIRE, YEL, 26AWG, 7/34AWG, 30.5M MPN: 5853 YL005 ALPHA WIRE
WIRE, YEL, 24AWG, 7/32AWG, 30.5M MPN: 3050 YL005 ALPHA WIRE
WIRE, YEL, 22AWG, 7/30AWG, 30.5M MPN: 3251 YL005 ALPHA WIRE
WIRE, YEL, 22AWG, 19/34AWG, 30.5M MPN: 5855 YL005 ALPHA WIRE
WIRE, YEL, 20AWG, 10/30AWG, 30.5M MPN: 3053 YL005 ALPHA WIRE
WIRE, YEL, 18AWG, 16/30AWG, 30.5M MPN: 1555 YL005 ALPHA WIRE
WIRE, YEL, 16AWG, 19/29AWG, 30.5M MPN: 5858 YL005 ALPHA WIRE
WIRE, WHT, 32AWG, 7/40AWG, 30.5M MPN: 2840/7 WH005 ALPHA WIRE
WIRE, WHT, 30AWG, 7/38AWG, 30.5M MPN: 1851 WH005 ALPHA WIRE
WIRE, WHT, 28AWG, 7/36AWG, 30.5M MPN: 3048 WH005 ALPHA WIRE
WIRE, WHT, 28AWG, 7/36AWG, 30.5M MPN: 2842/7 WH005 ALPHA WIRE
WIRE, WHT, 28AWG, 7/36AWG, 30.5M MPN: 1852 WH005 ALPHA WIRE
WIRE, WHT, 28AWG, 19/40AWG, 30.5M MPN: 2842/19 WH005 ALPHA WIRE
WIRE, WHT, 26AWG, 7/34AWG, 30.5M MPN: 1853 WH005 ALPHA WIRE
WIRE, WHT, 26AWG, 19/38AWG, 30.5M MPN: 2843/19 WH005 ALPHA WIRE
WIRE, WHT, 24AWG, 7/32AWG, 30.5M MPN: 1550 WH005 ALPHA WIRE
WIRE, WHT, 22AWG, 7/30AWG, 30.5M MPN: 5855/7 WH005 ALPHA WIRE
WIRE, WHT, 22AWG, 1/22AWG, 30.5M MPN: 1561 WH005 ALPHA WIRE
WIRE, WHT, 20AWG, 10/30AWG, 30.5M MPN: 3053 WH005 ALPHA WIRE
WIRE, WHT, 20AWG, 1/20AWG, 30.5M MPN: 2856/1 WH005 ALPHA WIRE
WIRE, WHT, 18AWG, 16/30AWG, 30.5M MPN: 3055 WH005 ALPHA WIRE
WIRE, WHT, 12AWG, 19/25AWG, 30.5M MPN: 5859/12 WH005 ALPHA WIRE
WIRE, WHT, 10AWG, 105/30AWG, 30.5M MPN: 3081 WH005 ALPHA WIRE
WIRE, VLT, 28AWG, 7/36AWG, 30.5M MPN: 2842/7 VI005 ALPHA WIRE
WIRE, VLT, 20AWG, 10/30AWG, 30.5M MPN: 3053 VI005 ALPHA WIRE
WIRE, UL1429, 26AWG, BLUE, 304.8M MPN: 7053 BL001 ALPHA WIRE
WIRE, UL1213, 30AWG, ORANGE, 30.5M MPN: 5851 OR005 ALPHA WIRE
WIRE, UL1213, 26AWG, WHITE, 304.8M MPN: 5853 WH001 ALPHA WIRE
WIRE, UL1213, 24AWG, WHITE, 304.8M MPN: 5854/7 WH001 ALPHA WIRE
WIRE, UL1213, 20AWG, RED, 304.8M MPN: 5856 RD001 ALPHA WIRE
WIRE, UL1061, 24AWG, YELLOW, 305M MPN: 3250 YL001 ALPHA WIRE
WIRE, UL1061, 20AWG, BLACK, 305M MPN: 3252 BK001 ALPHA WIRE
WIRE, UL1015, 24AWG, ORANGE, 305M MPN: 3070 OR001 ALPHA WIRE
WIRE, UL1015, 24AWG, BLACK, 305M MPN: 3070 BK001 ALPHA WIRE
WIRE, UL1015, 22AWG, YELLOW, 305M MPN: 3071 YL001 ALPHA WIRE
WIRE, UL1015, 20AWG, RED, 305M MPN: 3073 RD001 ALPHA WIRE
WIRE, UL1015, 20AWG, BROWN, 305M MPN: 3073 BR001 ALPHA WIRE
WIRE, UL1015, 18AWG, BLACK, 305M MPN: 3075 BK001 ALPHA WIRE
WIRE, UL1015, 16AWG, GRN/YEL, 305M MPN: 3077 GY001 ALPHA WIRE
WIRE, UL1007, 28AWG, GREEN, 305M MPN: 3048 GR001 ALPHA WIRE
WIRE, UL1007, 20AWG, GREY, 305M MPN: 3053 SL001 ALPHA WIRE
WIRE, UL1007, 20AWG, BROWN, 305M MPN: 3053 BR001 ALPHA WIRE
在線咨詢 
