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。

HYDAC VM5 D.0/-L24 Differential Pressure Filter Clogging Indicator

HYDAC VM5 C.0 Differential Pressure Filter Clogging Indicator

DMG FILTER P/N 2502099 Electrical Filtration Clogging Indicator

ASCO 8210G095HW 2 Way NC 3/4" Hot Water Solenoid Valve 120/60 AC 100 PSI

S HYDRAULICS CVEV-XCN Vented Pilot-To-Open Check Valve T-22A CVEVXCN

Parker Art No. 3181702017 FK1017.Q010.BA16.GX16 Oil Filter G1

ASCO SCE210D002 2/2 NC G1/2" General Service Brass Solenoid Valve 230/50 AC

S HYDRAULICS CVGV XEN VENTED PILOT-TO-OPEN CHECK VALVE T-23A

S HYDRAULICS B10415NG01 balanced poppet logic element NC pilot to Open Valve

The Meter Shop Switch Board Meter CR-07705RAHGXX -1/0/1 kg/cm2 4..20mA

Norgren Super VR 03 0625 02 3/2 Way G1/4 Push-Pull Pneumatic Control Valve

Parker VE131IN Solenoid Valve 2/2 NC G1/8" Coil XT09 230/50 AC 9W 0-25 bar

Crompton Instruments 007 Switch Board Meter 077-05RA-HGLC 0-1.5 kg/cm2 4..20mA

INGERSOLL RAND Model No. 7DE30AP Liquid Line Filter 38293403

The Meter Shop Switch Board Meter CR-07705RAHGXX 0-3 kg/cm2 4..20mA

The Meter Shop Switch Board Meter CR-07705RAHGXX 0-100 kg/cm2 4..20mA

The Meter Shop Switch Board Meter CR-07705RAHGXX 0-1.5 kg/cm2 4..20mA

Pneumax 818/1.52.0.0.02 R 5/2-Way Solenoid Valve Base-Moted 24V DC N331.0A

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HYDAC VR2 C.1/-2GBC Filter Clogging Indicator

HYDAC VR2 D.1/-L110 Filter Clogging Indicator

HYDAC VR2 D.1/-L220 Filter Clogging Indicator

HYDAC VR2 D.1/-LED Filter Clogging Indicator

HYDAC VR5 D.1/L24 Filter Clogging Indicator

DANFOSS 042G0055 Solenoid Coil 220/230V 50 Hz 17W

Parker Schrader Bellows # 3371002 Flow Control Valve 3/8" Max 250 psi

HYDAC VMF 2 / D.0 Clogging Indicator

Parker Coil  Plger assembly for Valve # 71215SN2MN00N0C111C1 24V DC 22W

IMI NORGREN B07-233-A1KG Air Filter / Regulator 1/4" Metal Bowl

FW MURPHY A25P-100 P/N 05704337 2.5" Pressure Swichgage® with Polycarbonate Case

ASCO 400525-217 Replacement Solenoid Coil 230/50 20 W-M12 CLASS F 400525217

ASCO Series 8314 8314G23 3-Way NC 1/4" Air Solenoid Valve 24V DC 60 psi

SMC 2-Way NC Vacuum Service Solenoid Valve 1/4" 24V DC

FESTO LR-ZP-P-D-1 P/N 35966 Intermediate pressure regulator plate

CKD 4F series 4F110-08N-AC110V 5/2-Way 1/4" Pneumatic Solenoid Valve 1/4" AC110V

CAMOZZI 454-016-22 5/2-Way G1/4 Pneumatic Directional Solenoid Valve w/o coil

COMPAIR 703111710A 3/2-Way Selector Pneumatic Directional Control Valve

Rexroth 5630201230 3/2-Way Push-Pull RED KNOB Pneumatic Directional Valve

Martonair S/666B/49 3/2 Way 1/8" Key Operated Pneumatic Control Valve

SICK WE36-R230 1009512 Photoelectric Sensor

HAFNER MH310701G 3/2-Way G1/4 Solenoid Pneumatic Directional Valve 230V AC

SMC Model VO317 VO-317-4DZ 3-Way Base Mtg Solenoid Valve 240/60 AC 220/50 AC

SMC Series VT317 VT317-5DZ-02 1/4" Direct Operated Poppet Solenoid Valve 24V DC

SMC Model VO317 VO-317-4DZ 3 Way Manif Moting Solenoid Valve 24V DC 0.9 Mpa

WABCO Rexroth 3630070010 NW7 3/2-Way Roller Lever Pneumatic Directional Valve

S HYDRAULICS DRBA-LAN DRBALAN Hydraulic Directional Cartridge valve

S HYDRAULICS NFBC-LCN NFBCLCN Hydraulic Directional Cartridge valve

PNEUMAX T514.52.00.39.B11 NAMUR Solenoid Valve 5/2-Way G1/4" 24V DC

FESTO DG-6-40 Pneumatic Cylinder Double Acting 6 mm Bore x 40 mm Stroke

S HYDRAULICS DPBC-LAN DPBCLAN Hydraulic Directional Cartridge valve

REXROTH MECMAN 3630070010 3/2-Way NW7 Pneumatic Dir. Cntrl Valve 363-007-001-0

PARKER P1S-D032MS-0100 Pneumatic Cylinder 32 mm Dia X 100 mm Stroke

Parker 4Z-PR4-VT-B PR Series Rotary Plug Valve 1/4" Tube 3000 psi 4ZPR4VTB

SAUTER Thermostat RAK582 4/3726 50 to 130 deg. C

TCR Electric Driven Motorised 2 port Ball Valve 1/2" 230V AC 50/60 Hz 5VA

MOORE Model 58S B/M 12530 -/ 10ZB High Pressure Selector Relay

GENERAL REGULATOR Model 50684-01 Pneumatic Control

Aquamatic Model K521-X221-14000 P# 1071143 Normally Open Thermoplastic Valve

10 pc Swagelok 316-S1T-PP-6T-ST Twin Bolted Plastic Clamp Tube Support Kit 3/8"

Balzers Instruments DVI105MI BPV58651 VACUUM VENT VALVE 24V DC 10W

PARKER WV2200-8 2/2 NC 1/4" 3mm direct acting Solenoid Valve AC220V 0-7 kgf/cm2

ORWAK Art. No.1221248 Pilot Valve for Waste Compactor

Asco 551 Series 5510208 Push Button 3/2-Way G1/4 Pneumatic Manual Control Valve

SIKA Industrial Thermometer 160°C Body 8" Stem length 2.5" BACK Size 1/2"

SIKA Industrial Thermometer 50°C Body 8" Stem length 2.5" BACK Size 1/2"

SIKA Industrial Thermometer 160°C Body 8" Stem length 4" BACK Size 1/2"

IMI NORGREN V51B517A-A213J 5/2-Way Pneumatic Directional Sol Valve 1/4" 24V DC

HANYOG NUX LEL-04-1 Mono Lever Switch Joystick

VICKERS 20102 Replacement Solenoid Coil 24V DC

CKD R4000-15-W Air Pressure Regulator 1/2" 1.0 Mpa

FESTO DSBC-40-10-PPVA-N3 1462834 Pneumatic cylinder 40 mm bore X 10 mm stroke

HONEYWELL M.S.05.65.01 CLOSED POSITION SWITCH FOR SERIES VE4000 VALVES

S Hydraulics RPEC LEN Pilot-operated, balanced piston relief valve RPECLEN

S Hydraulics RPGC KAN Pilot-operated, balanced piston relief valve RPGCKAN

Rexroth 0820038152 5/2-Way Pneumatic Directional Valve CD02-5/2AS-024DC 24V DC

PARKER 483-3/8B2-2 Brass  Flow Check Valve-8

Parker Fluid Connector 10-4K6PP4MXS Triple Lok Test Point Connection

Rexroth 5630201240 3/2 Yellow Push Button Pneumatic Directional Control Valve

Norgren V61B313A-A213J 3/2-Way 1/4" Pneumatic Directional Solenoid Valve 24V DC

NORGREN Valve Kit 0555255000000000 EP 802078022750/52/53/55

Rexroth Mecman Pneumatic Logic Valve 551-013-000-1 5510130001

EDWARDS Speedivalve SP10K V C331-55-0000 FKM GP Diaphragm C33155000 Max 9 bar

Crompton Instruments E244-022A Panel Meter Range 0/5/10 AMPS AC SCALED 0/150/300

Honeywell P7620A1004 Pressure Transmitter 0 to 6 bar G1/2 4..20 mA 10..32V DC

DEUTSCH Metal Components TRRB56-57-56-4G Swivel Fitting

Parker 06F Series 06F17AC Air Filter Metal Bowl With Auto Drain 40 micron 1/4"

BURKERT 6014 C1.2 FKM 24V DC 00552283 3/2 NC G1/4 Banjo Solenoid Valve 24V DC

S Hydraulics CBEH-LKN 10:1 Pilot ration Standard capacity Coterbalance valve

S HYDRAULICS CBEA LAN Hydraulic Coterbalance Valve CBEALAN

Rexroth MECMAN 5510260001 Pneumatic Timer Logic Valve 551-026-000-1

Rexroth 0820 204 003 5/2-Way G1/8 Air-Pilot/Spring Pneumatic Directional Valve

WABCO 5630101200 3/2 Manual Selector Pneumatic Valve

Honeywell MLH03KPSL01B Pressure Transducer 3000 psi 4-20 mA 1/4 NPT

Rexroth 0820 205 003 5/2-Way G1/8 Double Air-PilotPneumatic Directional Valve

VICKERS P/N 865887 220V DC 31W Replacement Solenoid Coil MH19333

MAC Series 52 52A-11-D0A-D-M-DDFJ-1KA 3 port Solenoid Valve 1/4" 24V DC 120 PSI

R900021554 Bosch Rexroth Solenoid Coil GZ45-4 24 / 48V DC 30W

MC Type W2PC-230 Temperature Sensor PT100 Temp 420°C

SMC VP4125-X52 5/2-way 1/4 in AC 110 V Solenoid Valve

Dragon Valve 125511KT 14899C8H SS316 Needle Valve 3/4 in. NPT M X F 6000 psi

WALKER Filtration E381AC Air Filter Element Activated Carbon

REXROTH Z1S 6 P2-33V Sandwich Type Modular Hydraulic Check Valve

Parker C1325 Base moted Cam Operated Spool Valve 3-Way 2-position 1/4 NPT

FOX TM45A1 Thermostat / Temperature Switch Max 120 deg. C 220V AC 10A

SMC VP342R-5DZ1-02A-F 3/2-Way 1/4" Pneumatic Solenoid Valve 24V DC

FESTO SDE1-V1-G2-H18-C-P2-M8 192035 Pressure sensor

Parker Schrader Bellows No. 003371002 3/8" NPT Fine Flow Control Valve 250 psi

Pack of 2 pieces FLUTEC RV-12-01.1/0-3 BAR 705946 Hydraulic Check Valve G1/2"

CKD AB31-03-5 2/2 NC General Service Solenoid Valve Rc 3/8" 0.25 Mpa DC24V

ASIAN SS304 Safety Relief Valve 1/2" BSP MXF Set Pressure 30 bar

CA VERKEN S-4-14-L-L-L71 5/2-Way Pilot Oper Pneumatic Directional Valve G1/4

Humphrey T062 4E1 Solenoid Valve 120/60 AC 0-125 psi

BAKER 40 mm Pressure Gauge 150 psi 10 bar 1/8" Back Entry Pack of 10 pieces

ASCO SCB262C14 2/2 NC 1/8" Brass General Service Solenoid Valve 230/60 AC

ASCO 8262G232 Red-Hat Solenoid Valve 2-Way NC 1/4" 120/60AC 300 PSI A/W

Burkert 0311 043841T 3/2 Way NC G1/8 Solenoid Valve 230V AC 4 bar

SMC IW215-02 Air Filter Regulator 1/4" 0.02 ~ 0.5 Mpa Max 1.0 Mpa

Eaton Airflex 145407DF 1/2" QRV Quick Release Valve W SLEEVE

Rhodes 170305-2 G Metal Sight Flow Indicator Spinner Wheel 3/8" BSP 10 mm

CKD AB42-02-7 2-Way NC 1/4" Brass Solenoid Valve 24V DC MWP 20 psi

FESTO VUWS-L30-B52-G38 575615 pneumatic valve

FESTO ESG Vacuum Suction Gripper 189173 ESG-20-BS-HD-QS

DPC Pneumatics P803-L Compressed Air Lubricator 3/4"

STASTO 21A2KV25 2/2 NC G1/4 Direct Acting solenoid Valve 24V DC 0-9 bar

SIRAI L125 2/2 NC G1/2 Solenoid Valve Coil ZB110A 110/60 AC

ASCO 238810-005-D SOLENOID COIL 24/60 AC 22/50 AC HT

Honeywell UGEN-22 T2798I1000 Temperature Controller it Module

RIEGLER 650 B/M Compressed Air Filter with Metal Bowl 40 µm G3/8 p/n 100974

VICKERS RV1 Series RV1-10-S-0-36/27 Hydraulic Relief Valve cartridge

PNEUMAX T228.52.6.27 5/2-Way 1/8 BSP Pneumatic Selector Valve

Sterling Hydraulics CCP 024 D PAT. 5002253 Replacement Solenoid Coil 24V DC 19W

DANFOSS 032U5706 2-way NC Solenoid Valve 1/8 30 bar Coil 042N7502 240/60 AC