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福建中立恒自动化设备有限公司

1．输入/输出单元

输入/输出单元通常也称I/O单元或I/O模块，是PLC与工业生产现场之间的连接部件。

PLC通过输入接口可以检测被控对象的各种数据，以这些数据作为PLC对被控制对象进行控制的依据；同时PLC又通过输出接口将处理结果送给被控制对象，以实现控制目的。

由于外部输入设备和输出设备所需的信号电平是多种多样的，而PLC内部CPU的处理的信息只能是标准电平，所以I/O接口要实现这种转换。

I/O接口一般都具有光电隔离和滤波功能，以提高PLC的抗干扰能力。另外，I/O接口上通常还有状态指示，工作状况直观，便于维护。

PLC提供了多种操作电平和驱动能力的I/O接口，有各种各样功能的I/O接口供用户选用。I/O接口的主要类型有：数字量（开关量）输入、数字量（开关量）输出、模拟量输入、模拟量输出等。

常用的开关量输入接口按其使用的电源不同有三种类型：直流输入接口、交流输入接口和交/直流输入接口。

常用的开关量输出接口按输出开关器件不同有三种类型：是继电器输出、晶体管输出和双向晶闸管输出。

继电器输出接口可驱动交流或直流负载，但其响应时间长，动作频率低；而晶体管输出和双向晶闸管输出接口的响应速度快，动作频率高，但前者只能用于驱动直流负载，后者只能用于交流负载。

PLC的I/O接口所能接受的输入信号个数和输出信号个数称为PLC输入/输出（I/O）点数。I/O点数是选择PLC的重要依据之一。当系统的I/O点数不够时，可通过PLC的I/O扩展接口对系统进行扩展。

2．通信接口

PLC配有各种通信接口，这些通信接口一般都带有通信处理器。

PLC通过这些通信接口可与监视器、打印机、其它PLC、计算机等设备实现通信。

PLC与打印机连接，可将过程信息、系统参数等输出打印；与监视器连接，可将控制过程图像显示出来；与其它PLC连接，可组成多机系统或连成网络，实现更大规模控制。

与计算机连接，可组成多级分布式控制系统，实现控制与管理相结合。远程I/O系统也必须配备相应的通信接口模块。

3．智能接口模块

智能接口模块是一独立的计算机系统，它有自己的CPU、系统程序、存储器以及与PLC系统总线相连的接口。

它作为PLC系统的一个模块，通过总线与PLC相连，进行数据交换，并在PLC的协调管理下独立地进行工作。

PLC的智能接口模块种类很多，如：高速计数模块、闭环控制模块、运动控制模块、中断控制模块等。

Burkert 413-G-G1/4 Solenoid Valve And Manifold Assembly w/2X 491/000A NW3/G1/8

MAC Valves 825C-PM-611BA-572 Solenoid Valve

Mac Valves 461A-B0A-DM-DDAJ-1KJ with  DM3A-DDAJ-1KJ Solenoid Valve

SMC VV5QC21-05N9PD0-S Solenoid Manifold 2000 Series 5 Port

SMC SY5301-5UD1-WO-02 Pneumatic 5 Port Solenoid With 4/5 Port Solenoid Manifold

SMC Solenoid Stack 2) VVQ1000-10A-1 Blanks 3) VQC1200N-51 Valves 1) VQC1100N-51

Parker B370BD547C 5-Port Solenoid Air Control Valve 12V DC 150psi

SMC VV5QC11-03N7SD0-S Pneumatic Solenoid Manifold w/ VQ1100N-51 & VQC1400N-51

Asco Red Hat HC8316G066 250/DC Solenoid Valve

Parker B370BD547C 5-Port Solenoid Air Control Valve 12V DC 150psi w/ P2E-MV35B

MAC Valves 538B-1 Solenoid Valve

SMC VP744-5DZ1-04N-M-X555 Solenoid Valve 3-Port

MAC Valves 6311D-311-PM-611DA Pneumatic Solenoid Valve w/ 1/2" NPTF Sub-Base

Cole Parmer 01540-08 2-Way Direct Lift Solenoid Valve 1/8" NPT 18psi 24VDC

Mac Valve 303G-111D1 Solenoid Valve 120V/60Hz 110V/50Hz

SMC 8 Solenoid Valve Manifold w/ (2) VVQ1000-10A-1 (2) VQ1300N-5 (4) VQ1100N-5

MAC Valves 821C-PM-501BA-152 Solenoid Valve 2-Position 24VDC 150PSI

SMC Solenoid Valve Assembly (4) VQC2100N-51 & Terminal Block Housing

SMC VV5QC11-08C6FD0 Manifold Base w/ Solenoids

Mannesmann Rexroth 4WE 6 E67-53/BG24NZ4/T07 Solenoid Valve

SMC VXD252MZ2CG Pilot Operated 2-Port Solenoid Valve 20mm Orifice 110VAC

MAC Valves 621B-11-611BA Double Solenoid Valve

Numatics 153SS515M000061 Double Solenoid Valve

Numatics 153SS515M000061 Solenoid Valve 24VDC 0.25A with Manifold

MAC Valves MV-P2A-ABDA-DM-DFFP-1DR9 Solenoid Valve VAC to 150psi

Parker Hannifin GG202-25-M2A Solenoid Valve 4-Way 2-Position 1/4" NPT 4-Port

SMC SS5V1-W10CD-10U-N7 Manifold w/ 10x SV1100-5FU Solenoids

Numatics 152SS525M019M61 MK 15 Series Solenoid Valve 4-Way 0.25A 24VDC

MAC Valves 825C-PM-612BA-552 Dual Solenoid Valve with PME-612BAAA 24V Coils

MAC Valves PME-111DABE Solenoid Valve

MAC Valves MV-P2A-ABDA-DM-DFFP-1DR9 Solenoid Valve

SMC 8 Solenoid Valve Manifold w/ (5) VVQ1000-10A-1 (3) VQ1300N-5 Vavles

Asco RedHat 306688-U Solenoid Valve Repair Kit

BURKERT 413-G-06 0B-PA G 1/4-F-302 SOLENOID VALVE W/MURR ELEKTRONIK VBS-RC 022/2

MAC Valves PME-611JC & MV-A2B-A141-PM-611JC Solenoid Valve Assembly

SMC SY5200-5NZ1-WO-02N Solenoid Valve

MAC Valves 612A-11-601BA 4-Way Solenoid Valve

GC Valves NS201YF16F7CG4 Solenoid Water Valve 3/8” NPT, 2 Port / Way

GC Valves S402AF02V9BF5 Solenoid Valve 1/4" NPT 2-Way N.O.

Precision Dynamics D2026-S25 Solenoid Valve 240/50/60R 12W 50 MOPD 3/16 ORIFICE

SMC VP544-5DZ1-03N-M-X555 Pneumatic Solenoid Valve Manifold w/ 2X Omron D4N-9B31

MAC Valves PR92C-M0AB (2) & 35A-B00-DDAJ-1KD Solenoid Valve Assy.

Festo VMPA2-M1H-E-PI Solenoid Valve 537956

SMC SV1300-5W7U-01T Solenoid Valve on Manifold 0.2~0.7MPa

SMC SY3140-5LOU-01T Solenoid Valve LOT OF 5 on Manifold Block

SMC VXD252MZ2AG 2-Way Media Solenoid Valve 24VDC 2A

Automation Direct AVS-533E2-24D Solenoid Valve 5-Port 3-Position NPT 1/4 DC 24V

SMC VXZ250JZ2CG Pilot Operated 2 Port Solenoid Valve for Air

MAC Valves PME-611JC & MV-A2B-A141-PM-611JC Solenoid Valve Assy

Mac Valve MV-A2B-A141-PM-611JC9 Solenoid Valve

Norgren V08N516AE212B 5/2 Solenoid Valve 12VDC 1W 12817-T12

ASCO Red-Hat Air 8215A53 Solenoid Valve 1-1/4" NPT 120V 15.4W 60Hz

Asco 8210G094N 1/2" NPT 2 Way Solenoid Valve 120VAC 5/8" Orifice 20232

Magnatrol Valve Co. 114542 Solenoid Valve

MAC Valves 612B-11-611BA Solenoid Valve 24VDC

MAC Valves 45A-EA1-DDAA-1BA Solenoid Valve 24VDC 5.4W

Mac Valves 45A-L00-DDAJ-1JM 24VDC Solenoid Valve with MURR 7000-42081 Connector

Numatics Pneumatic Solenoid Valve Manifold Assembly w/ 2 051BA400M047N61

Numatics 082SS515M000061 Mark 8 Double Solenoid Valve W/ Man Block 24 VDC

SMC SV1300-5W2U-01T Solenoid Valve, 5 Port, 4 Pin Connector Cable

Asco JHC8210D95E Solenoid Valve 3/4" Pipe 250/DC Red-Hat

Mac Valves 92B-DAF-000-DM-DDAP-1DM Solenoid Valve 20-120 PSI

MAC Valves 811C-PM-611BA-152 Solenoid Valve w/ PME-111BA-AA Coil 6.8W 25-150PSI

SMC NVS3145-0452D Solenoid Valve 3-Port

SMC VV5QC21-05N9PD0-S Solenoid Manifold 2000 Series 5 Port DIFFERENT A & B PORTS

MAC VALVES 45A-AA2-DAAA-1CA Solenoid Valve 120PSI 110/120VAC

SMC VNH233B-15A-5DZ-B-X200 Solenoid Controlled 2 Port Coolant Valve N.C. 24V DC

MAC Valves 82A-CC-JAA-TM-DDFP-1DA 4/2-Way Solenoid Valve 24VDC 150PSI

SMC SY3100-5U1-WO-01N Mounted Solenoid Valve Plug-In Manifold

SMC SS5Y3-45FD-05U-N7 Manifold w/ 5) SY3140-5FU Plug In Solenoid Valve

Burkert 0330 C 1/8 FPM BR Solenoid Valve NPT1/4 PMAX 145 PSI

Festo VMPA2-M1H-N-PI Air Solenoid Valve 537958

Mac Valves 45A-SA1-DDCA-1BA Solenoid Valve 2-Port 12VDC 7.5W

G.W. Lisk L-4531 Solenoid

SMC VV5QC11-06B4SD0-D Manifold w/1000 Series Solenoids

Mac Valves 92B-CAF-000-DM-DDAP-1DM Solenoid Valve 20-120 PSI

Rexroth 4WE10E21/AG24NZ45V Solenoid Valve

MAC Valves 811B-111C-152 Solenoid Valve with PME-6111BAAA 24VDC Coil 25-150 PSI

GC Valves S402AF02V9BF5 Solenoid Valve 1/2" NPT 300PSI 1.85A 120V 11W

SMC AV4000 Pneumatic Solenoid Soft Start Valve 24VDC 1/2" NPT

Bosch 0820015803 Solenoid Valve w/ Two Mufflers

MAC Valves MV-A2B-A211-PM-611JC9 Solenoid Pilot Operated Valve w/ Solenoids

Mac Valves PR92C-M0AB (2) & 35A-B00-DDAJ-1KD Solenoid Valve On Manifold Block

MAC Valves 811B-111C-152 Solenoid Valve with PME-6111BAAA 24VDC

MAC Valves 811C-PM-611BA-152 Solenoid Valve w/ Coil 8.5W 24VDC w/ SMC AS2100-00

SMC SY5440-5WOU-02T Double Solenoid Valve

SMC SY50M-27-1-WO-02N Solenoid Valve Subplate 5-Port SY5000

MAC Valves 825C-PM-611BA-652 Double Solenoid Valve

SMC ZM133HT-K5W0-X322 Vacuum Generator Assembly SYJ3420-5W0 Solenoid

Parker P2LCZ593ESNDBB49 SOL-SPR Single Solenoid Valve 5-Port

SMC SY5101-5U1-WO-02N-NA Solenoid Valve 4/5 Port

Automatic Valve L4505CBADA Solenoid Valve

Festo VSVA-B-T32U-AZD-A1-1T1L Air Solenoid Valve 539152

Mac Valves 811C-PM-111BA-152 Valve with PMC-6111BAAA 24VDC Solenoid

Rexroth 261-208-120-0 Pneumatic Solenoid Valve 24VDC

SMC SV2100-5W1U-02T Solenoid Valve 5-Port

Festo MFH-5/3E-D-1 C Solenoid Valve with VDMA 24345-A-1

MAC Valves Manifold Assembly w/ 44B-AAA-GDCC-1KT Solenoids and Circuit Bar

Numatics 153SS615M000061 Solenoid Valve 24VDC 0.25A

MAC Valves MV-P2A-ABDA-DM-DFFP-1DR Direct Solenoid Operated Valve Dbl Operator

MAC Valves 914A-PM-591BAAD Solenoid Valve 25-150PSI

MAC Valves 333G-111D-1 Solenoid Valve 6.8W 120/60-110/50VAC 25 to 150psi

SMC SS5Y3-F2J03 Manifold w/ 5 SY3140-5LOU Solenoid Valves 1 Damaged

Asco 222-182-026-D 250 DC Solenoid Valve Coil 222-182-26-D 240V

SMC SV3400-5W1U-02N Solenoid w/ Mount 0.2~0.7MPa

Ross 7076A3301 5/2 Single Solenoid Valve Pilot Spring Return

SMC SV1400-5W2U-01N Solenoid Valve

Ross 5500A2003 4-Port Solenoid Valve Manifold W/ Mufflers

Numatics Top Cover 8m for 2012 series Solenoid Pilot Actuated Valves LOT OF 24

ASCO 8622G202V Red Hat II 240/60, 220/50 1/4 2W NC LO Solenoid Valve 8262C202V

SMC VXD262NZ2AG Brass 2-Way Media Solenoid Valve

MAC Valves 811C-PM-601BA-152 Solenoid Valve with 24VDC Coil

SMC VQC1400N-51 Double Solenoid Valve

Ross 927K93 Solenoid Valve 12VDC

SMC N24124-0052F Pneumatic Solenoid Valve LOT OF 5

SMC VQC1500N-51 Double Solenoid Valve 5 Port

Miller Fluid Power Division A-621-04-8 Spring Activated Solenoid Valve 120V 6734

SMC SY5101-5NZ1-WO-0ZN Pneumatic Solenoid Valve w/ Manifold 24VDC 0.4W

MAC Valves 6511A-311-PM-601DA Solenoid Valve w/ 4-Port Manifold

Mac Valves 811C-PM-612BA-152 Solenoid Valve 5/2 Way With PME-612BAAA 24VDC Coil

SMC VQC1400N-51 Plug-In Solenoid Valve

Mac Valves 55B-22-PE-591BA Solenoid Valve 24V

MAC Valves 612B-11-601BA 4-Way Solenoid Valve 12/VDC 8.5W

SMC VQZ312BR-5L1-C10-F 5 Port Solenoid Valve 2 Position 18mm Body L Type Plug

SMC SYJ3430-5WO Double Solenoid Valve

MAC Valves 811C-PM-611BA-152 Solenoid Valve w/ PME-611BAAA Coil 24VDC 8.5W

MAC Valves 35A-B00-DDAJ-1KD Direct Solenoid Operated 3-Way Poppet Valve

MAC Valves 6316D-611-PM-501DA9 Solenoid PME-501DAAG

MAC Valves 55B-11-PE-111AA Pneumatic Solenoid Valve 120V 6.8W

Mac Valves 611B-11-601BA Solenoid Valve 4-Way 12VDC 8.5W

Numatics 082SS515M000061 Mk 8 Series Solenoid Valve 4-Way 0.25A 24VDC

SMC VQC2400-5 VQC2A58 3-Position Closed Center Solenoid Valve 24VDC 0.1-0.7MPa