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？删幊绦蚩刂破骷捌溆嘘P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；締卧蛿U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、。
（1）低檔PLC
低檔PLC具有邏輯運算、定時、計數、移位以及自診斷、監控等基本功能，還可有少量模擬量輸入/輸出、算術運算、數據傳送和比較及通信等功能，主要用于邏輯控制、順序控制或少量模擬量控制的單機控制系統。
FedEx /DHL ONE NEW VEXTA 31K15GN-A
FedEx /DHL ONE NEW VEXTA AID75A-C
FedEx /DHL ONE NEW VEXTA CMD2112P
FedEx /DHL ONE NEW Vexta FBLM575W-GFB
FedEx /DHL ONE VEXTA RKD507-A
FedEx /DHL ONE Vexta RKD514L-A
FedEx /DHL ONE VEXTA VEXTA Motor / PK534-NB
Honeywell DDC controller XL20 CH/XL20CH WITH FAST SHIPPING
KOHZU MOTORED PRECISION TILTING STAGE SH07-01,VEXTA PK543-NA WORKING FREE SHIP
NEW Oriental Motor CSD5814N-P 5-Phase Stepper Driver Drive Japan
UDX5128N VEXTA stepper driver 60 days warranty
Vexta 2 Phase Stepping Motor PH299-02B
VEXTA 5-PHASE DRIVER UDK5107N PK543AW1-H50 STEPPING MOTOR HARMONIC REDUCER 50:1
VEXTA 5-PHASE DRIVER UDK5114NW2
VEXTA ASC46AK-T30 MOTOR & DRIVER / ASM46AK-T30 / ASD18B-K
Vexta C7810-9012K - Transf. Arm Z-Axis Motor 718.84461 - Siemens BN Prospec
Vexta DGM85R-ASAA Hollow Rotary Actuator P/N ASM46AA-D w/ASD13B-A DRIVE
VEXTA Servo Stepper motor ASM66AA-T7.2
VEXTA STEPPING MOTOR 5-PHASE PX533MH-B, CSD5807N-P DRIVE TESTED WORKING FREE
(2) ALLIANCE INJECTOR ASSEMBLIES PLC / LC - VEXTA PH265-04-C18 STEPPING MOTOR
(LOT OF 4) ORIENTAL MOTOR CO VEXTA STEPPING MOTOR PK564AU-TG30 5-PHASE
(NIB) VEXTA ASD12A-C/200-230V Closed Loop Stepper Motor Drive
(NIB) VEXTA BLESS DC MOTOR DRIVER BXD200A-C
(NIB) Vexta Servo Motor Pk569naw
(NIB) Oriental Motor Vexta stepping Motor ASM66AC & diver ASD12A-S
(NIB) Oriental Motor Vexta stepping Motor ASM66AC & diver ASD12A-S
(NIB) Oriental Vexta ASD24A-A Servo Motor Driver
(NIB) VEXTA ASD12A-C/200-230V Closed Loop Stepper Motor Drive
(NIB) VEXTA BLESS DC MOTOR DRIVER BXD200A-C
(NIB) Vexta Servo Motor Pk569naw
(USED) VEXTA SPG8800
**USED VEXTA PH266-01GK-C55 90days warranty Free DHL or EMS
**USED VEXTA PH266-01GK-C55 90days warranty via DHL or EMS
**USED VEXTA PK545NAW 90days warranty via DHL or EMS
**USED VEXTA PK545NAW 90days warranty
**USED VEXTA PK545NAW 90days warranty via DHL or EMS
**USED VEXTA PKE566BC 90days warranty
**USED VEXTA PKE566BC 90days warranty Free DHL or EMS
**USED VEXTA PKE566BC 90days warranty via DHL or EMS
**USED VEXTA Stepper motor ASM46AK
**USED VEXTA Stepper motor ASM46AK via DHL or EMS
**USED VEXTA Stepper motor ASM46AK via DHL or EMS 1
**USED VEXTA Stepper motor DGM60-ASAK Free DHL or EMS 1
**USED VEXTA Stepper motor DGM60-ASAK via DHL or EMS 1
*1 YEAR Warranty* - Customized Service - Fast Shipping
*NEW* VEXTA FBL5120AW-15 ORIENTAL MOTOR E55106A1 GEAR HEAD DRIVER SPEED CONTROL
*NEW* VEXTA FBL5120AW-15 ORIENTAL MOTOR E55106A1 GEAR HEAD DRIVER SPEED CONTROL
*NIB* VEXTA BLD30A-F BLESS DC MOTOR DRIVER
*NIB* VEXTA BLD30A-F BLESS DC MOTOR DRIVER
*Recertified* Matrox Odyssey XCL O10G5MDBCL* Y7108-04 010G5MDBCL* Warranty
*USED VEXTA PK545NBW-C30 Free DHL or EMS
*USED VEXTA PK545NBW-C30 via DHL or EMS
*USED VEXTA PK546PA Free DHL or EMS
*USED VEXTA PK546PA via DHL or EMS
*USED VEXTA PK545NBW-C30 Free DHL or EMS
*USED VEXTA PK545NBW-C30 via DHL or EMS
*USED VEXTA PK546PA Free DHL or EMS
*USED VEXTA PK546PA via DHL or EMS
[2UNIT] ORIENTAL VEXTA STEPPING MOTOR ARM24SAK-T10
[Lot Of 5] Oriental Motor Vexta Synchronous Motor Smk5100A-Aa Smk5100Aaa
[New Other] ORIENTAL VEXTA / BLFD60C2 / DC MOTOR DRIVE, Case breakage
[New Other] ORIENTAL VEXTA / BLFD60C2 / DC MOTOR DRIVE, Case breakage
[New Other] VEXTA / KBLM6180GD-CM / AC SERVO MOTOR, 180W
[New Other] VEXTA / KXPM5120-AB / AC SERVO MOTOR, 120W
[Used] ORIENTAL VEXTA / ASD12A-SSS / DRIVER, 1.5A
[Used] ORIENTAL VEXTA / PK564AN-TG7.2 / 5-Phase Steeping Motor
[Used] ORIENTAL VEXTA / PK569K-NACM / Stepping Motor
[Used] ORIENTAL VEXTA / UPH5913H-A / Stepping Motor
[Used] VEXTA / A4809-9215KE / 5-Phase Stepping Motor, DC 1.4A, 1.1?
[Used] VEXTA / A4934-9415KPGE / 5-Phase Stepping Motor, DC 1.4A, 2.3?, Dent
[Used] VEXTA / AF-MI-LG-1x-V2, PH265-01 / Actuator, Stepping Motor
[Used] VEXTA / ASM66AA-P10 / Stepping Motor
[Used] VEXTA / ASM66AC-P7.2 / Stepping Motor, DC 5.4V, 0.8A, 1pcs
[Used] VEXTA / EM569-NA / 5-Phase Stepping Motor, DC 1.4A, 2.1?, 1pcs
[Used] VEXTA / KBLM460GD-AM / AC SERVO MOTOR, 60W
[Used] VEXTA / KBLM6180GD-AM / AC SERVO MOTOR, 180W
[Used] VEXTA / KBLM6180GD-C 6GD30K / GEAR MOTOR
[Used] VEXTA / KXPD180-CBZ / AC SERVO DRIVER
[Used] VEXTA / PK596K-NACM / 5-Phase Stepping Motor, DC 1.4A, 1.5?
[Used] VEXTA / RKD507-A, PK543ABW-H50S / 5PH Motor, Drive Set
[Used] VEXTA / UDK5150 / 5-PHASE DRIVER
[Used] VEXTA / UPH566H-B2 / 5-Phase Stepping Motor, 1.4A, 2.26?
[Vexta] RK543AA-T7.2 Stepping Motor Set 5Phase 110V RKD507-A PK543AW-T7.2 NIB
? [7036] ORIENTALMOTOR/ VEXTA/ PK268M-E2.0B /??DHL shipping!
? [7036] ORIENTALMOTOR/ VEXTA/ PK268M-E2.0B /??DHL shipping!
?[1278] VEXTA PK299-03B / Fast Shipping!
?[1278] VEXTA PK299-03B / Fast Shipping!
?[10848] ORIENTAL MOTOR , VEXTA , ASM66AC-T20 , via DHL
?[10849] ORIENTAL MOTOR , VEXTA , ASM66AC-T20 , via DHL
?[10863] ORIENTAL MOTOR , VEXTA , PK268M-E2.0B , via DHL
?[10878] ORIENTAL MOTOR , VEXTA, PK268M-E2.0B, via DHL
?[10879] ORIENTAL MOTOR , VEXTA, PK268M-E2.0B, via DHL
?[10880] ORIENTAL MOTOR , VEXTA, PK268M-E2.0B, via DHL
?[10881] ORIENTAL MOTOR , VEXTA, PK268M-E2.0B, via DHL
0040-52760 / LIFT TO CATHODE ADAPTER / APPLIED MATERIALS AMAT / VEXTA
1 AXIS ACTUATOR CARRY WITH VEXTA C7214-9015
1 AXIS ACTUATOR CARRY WITH VEXTA C7214-9015
1 condition ASM66MC good pcs VEXTA in tested servo Motor
1 PC Honeywell XCL5010 Controller Module In Good Condition
1 pc for the new VEXTA Oriental DRL42PB2G-04 stepper motor
1 pc for used VEXTA ASM69AC closed loop stepper motor
1 PC Honeywell XCL5010 Controller Module In Good Condition
1 PC new VEXTA MOTOR GFS4G30
1 pc NEW VEXTA Oriental Stepper Driver EZMC131-A
1 PC UDX5114 VEXTA stepper drive
1 PC USED ASD30A-A VEXTA stepper drive
1 PC Used HBLD25K VEXTA stepper driver
1 PC Used KBLD60-A VEXTA stepper driver
1 PC Used PK264A2-SG7.2 VEXTA stepper motor
1 PC Used UDK5114N VEXTA stepper driver
1 PC Used UI2120G VEXTA stepper driver
1 PC Used Vexta BXM460-GFH2 In Good Condition
1 PC Used Vexta KXPD30-CBZ In Good Condition
1 PC Used VEXTA PK569AE-A5
1 PC Used VEXTA Servo Motor ASM66MK-N5 In Good Condition
1 PC Vexta PK569BW Used
1 PC VEXTA PK599AW Motor Tested PK599AW
1 PC VEXTA Stepping motor ASM66AC-T7.2 Tested
1 pcs new VEXTA servo Motor ASM66AK-N10
1 pcs new VEXTA servo Motor ASM66AK-T7.2
1 pcs VEXTA Motor PH544-NB
1 pcs VEXTA Motor UPH596H-A tested
1 pcs VEXTA BXM5120-GFH2 motor
1 pcs VEXTA servo Motor ASM66AK-N10
1 pcs VEXTA servo Motor PK543AN-TG30 tested
1 pcs new VEXTA stepper motor ASM66AA
1 pcs new VEXTA stepper motor ASM66AA-H50
1 PCS NEW IN BOX VEXTA AXUD40C Governor
1 PCS NEW IN BOX VEXTA driver ARLD16A-C
1 PCS NEW IN BOX VEXTA driver BLHD15K
1 PCS NEW IN BOX VEXTA driver CMD2109P
1 PCS NEW IN BOX VEXTA driver CMD2112P
1 PCS NEW IN BOX VEXTA driver UDK2120
1 PCS NEW IN BOX VEXTA driver UDX5114
1 PCS NEW IN BOX VEXTA motor AXHM230K-GFH
1 PCS NEW VEXTA driver AXHD30K
1 PCS NEW VEXTA driver AXHD50K
1 pcs VEXTA Motor PH264-01 tested
1 pcs VEXTA Motor PK266-02A new in box
1 pcs VEXTA Motor PK266-E2.0A tested
1 pcs VEXTA Motor SD5114P new in box
1 pcs VEXTA ASM36AK servo motor tested
1 pcs VEXTA driver UDK2120 new in box
1 pcs VEXTA motor drive UDK5128N-M tested
1 pcs VEXTA Motor PK268-02B new in box
1 pcs VEXTA motor 5-phase UPH569-AM-M8 stepper motor DC1.4A tested
1 pcs VEXTA Oriental Motor ASM66AA Closed Loop Controller tested
1 pcs VEXTA Oriental Motor Brushless DC Motor BXM230-GFS GFS2G10 tested
1 PCS Vexta Oriental Motor BXD200A-A Driver Tested
1 pcs VEXTA Oriental Stepper Drive ASD16B-C tested
1 pcs VEXTA servo A5653-9215KTGM tested
1 pcs VEXTA servo ASM46MA new in box
1 pcs VEXTA servo ASM46MA ASM46MA tested ok
1 pcs VEXTA servo ASM46MA-H50 tested ok
1 pcs VEXTA servo ASM46MA-T3.6 tested ok
1 pcs VEXTA servo motor ARM911AC tested
1 pcs VEXTA servo motor ASM911BC tested
1 pcs VEXTA servo motor PK564AW-T10 tested
1 pcs VEXTA servo motor ASM66MA tested
1 pcs VEXTA servo motor ASM66MA-P10 tested
1 pcs VEXTA servo motor PK564AN-TG7.2 tested ok
1 pcs VEXTA servo motor PK569NAW tested
1 pcs VEXTA servo motor PK569NAW tested ok
1 pcs VEXTA servo Drive +ASD-C3 tested
1 pcs VEXTA servo Drive ASD24A-A new in box
1 pcs VEXTA servo Drive ASD24A-A-B1 tested
1 pcs VEXTA servo Drive ASD24C-A new in box
1 pcs VEXTA servo Drive DFU1514W-M tested
1 pcs VEXTA servo Motor ASM66AK tested
1 pcs VEXTA servo Motor PK564BW-T10 tested
1 pcs VEXTA servo Motor PK569AHW tested
1 pcs VEXTA servo Motor PK596H-NAC tested
1 pcs VEXTA servo Motor A6714-9015KHG tested
1 pcs VEXTA servo Motor ASM66AC-N36 tested
1 pcs VEXTA servo Motor ASM66MC tested
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