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。

NABTESCO HE-2-MFX-1 Lever Operated Pneumatic Control Valve 1.0 Mpa

BAYLOR Brake Control Model 2025

FLOWSERVE NT3000 I/P CONVERTER IN 4..20mA OUT 3 -15 psi NEMA4X / TYPE 4X

HONSBERG VD-GR Series VD-040GR150 -468 Adjustable Piston Flow Switch 1-1/2"

AIRFLEX 145488AB Rotorseal Assembly 1" RH carbon steel 1200 RPM

AMOT Model 4064 Differential Sensing Pressure Valve 4064B62F-AAA

Sauer Danfoss 1EEC12-01-B-12S-E-A-10.0-015A Coterbalance control valve block

Ingersoll Rand 382-360019-S Emergency Stop Valve Assembly

AVENTICS 3750240000 Pressure Reducing Valve 375 024 0000

ABB Model FAM3220 ATEX Armored Variable Area Purgemeter 10.5 L/H max Diesel

TRAFAG 8736.28.2200.06 Gas Density Controller Siemens 412 05404 011 -100..1000

TRAFAG 8736.28.2200.J6 Gas Density Controller Siemens 412 05404 008 -100..1000

Sauer Danfoss 11084109 PVEH32 02ATEX459X Standard Electrical Actuator 22-30V

Ametek Solartron Meterology M920128AG14-05 DC50 LVDT Displacement Sensor

Norgren R18 Series R18-C00-RNXG Pilot Pressure Air Regulator G2"

Norgren R18 Series R18-C34-RNSA Pilot Operated Hi Flow Regulator 2"

HERION ATEX Solenoid Valve 2413355 3/2-Way 1/2 NPT Stainless Steel 110V DC

POWERS No 11 Regulator Product 595 ST 050 H C08 DN05 110-170°F 43-77°C 1/2"

REXROTH 4TH6 P/N 4TH6-EXX14-ST-03-M05 Hydraulic Joystick Armrest Pilot Control

NORGREN 68 Series Air Service FRL BL68-B08 Filter Regulator  Lubricator G1-1/2"

REXROTH 4TH6 4TH6 U 20-14 M01 Hydraulic Joystick Armrest Pilot Control

HAWE Hydraulik Type LHDV Load Hing Valve LHDV 33-25 W-E 6-200/100 230/120

FESTO VSVA-B-M52-AZD-A2-1T1L 539184 Valve Terminal Bank of 8 with manif base

COAX MK 10 NC 14 10C1 3/4 DC 24W DC 2/2 NC Coaxial solenoid Valve G3/4 24V DC

Aventics 371010 Pneumatic CD4 Directional Control Valve

Rexroth Pneumatik 371010 Pneumatic CD4 Directional Control Valve

WABCO 371010 Pneumatic CD4 Directional Control Valve

Rexroth Mecman 371010 Pneumatic CD4 Directional Control Valve

IMI BUSCHJOST 8228700.0000.00000 2/2 NC G2" Pneumatic Angle Seat Piston Valve

CO-AX 5-VMK 15 NC 54 15C110/0BD 24R 16B 522404 COAXIAL VALVE G3/4 24V DC 16 bar

HYDAC CX06 2/2-way Pilot Operated coaxial valve G1/2" with Namur Solenoid Valve

WILLIAMS WM292 High Volume Compensating Relay Valve

NORGREN 10-826-997 Mainline Lubricator G2" 1 Litre Tank 10826997 Max 250 psig

NUMATICS R50WG12 High Flow Pilot PressurePneumatic Regulator G1-1/2" 0.5-20 bar

FESTO MEBH-5/2-D-1-ZSR-FR-C 184494 X 2 JMEBH-5/2-D-1-ZSR-C 184495 X 4 MANIF

HAWE Hydraulik G3-3 Directional Seated Valve Valve G1/2" 24V DC G 3-3

R431008366 Rexroth PD40044-2154 Rexroth Type 'D' Pilotair® Valve

BARKSDALE Series 6900 6943S3AC3-MC-J Manual High Pressure Control Valve 3/4"

FAIRCHILD Model 25 Reversing Relay Catalog No. 2566A 2-150 psi 3/4" NPTF

R900224294 Rexroth M-3 SED 10 UK13/350 CG 4N9K4/B18 Hydraulic Valve 24V DC

ALCON 33B31Z5A3-6F159 ATEX SS Solenoid Valve 3/2 NC 1/4" NPT 24V DC 0-10 bar

HAWE Hydraulik NBVP 16-ZD/R-G 24 ATEX Hydraulic Directional Control Valve 24V DC

HAWE PMVP PMVP 5-44 G24 Proportional Pressure Limiting Valve

R480016934 AVENTICS HF04 VER 11 AAA2A1A2AA Pneumatic Valve System 0820062052

IMI HERION 24000 2402450 Direct Solenoid Actuated Poppet Valve G3/8 24V DC

HAWE Hydraulik WGR2-3 2/2 Way Directional Seated Valve Valve G3/4" 196V DC

Wilkerson WS0-0C-000B Pneumatic Condensate Separator 2" NPT 16 bar 742 SCFM

INGERSOLL RAND 71386064 3 position Manual Joystick Throttle Valve

HAWE Hydraulik SG5V ME342 4/2 Way G1" Solenoid Operated Hydraulic Valve 24V DC

DEUBLIN 257-129-467 Brass Rotating ion 3/4" NPT RH 3/8 BORE 257129467

R434001508 Rexroth E/P Pressure Regulator ED05 ND5 0-10V DC 0-100 psi 160 psi Mx

R900710167 Rexroth 4WP10D31//12 Pilot Operated Hydraulic Directional Valve

NABCO PSM-36E Super-Spool Pneumatic Directional Valve 3-Way 3/4" DC 24V 11W

BN767S-15 NIHON SEIKI 4-Way Pilot Operated Solenoid Valve 1/2" 110V AC 60 Hz

OVAL Model NPI45 Valve Position Indicator NPI45B-30 3871 cc

OVAL Model NPI45 Valve Position Indicator NPI45B-30 814 cc

REXROTH 371 029 031 0 3/2-Way-Pneumatically Operated Poppet Valve

PI1699 IFM Flush pressure sensor with display PI-1-1BREA01-E-ZVG/US/ /P

WABCO 3710290070 Pneumatic Directional Control Valve 3/2-Way M4X1.5

S HYDRAULICS CBIG-LCN standard capacity coterbalance valve CBIGLCN

DANFOSS Multipack 6 pieces Motorized Ball Valve FBV-2 193B0915 DN15 220V AC

Seitz Type 603/41 123.211.00 5/2-Way G1/4 Air-Pilot Pneumatic Dir. Valve 40 bar

HYDAC HAX-HM1 GSV6-10-CE1637 EN ISO 4126 1.6.G.205 KG/H Gas Safety Valve 350 bar

ASCO Series 327 ATEX Solenoid Valve NF8327B001MO 1/4" 230/50-60 Hz 0-10 bar

Alfa Laval 9612578904 ThinkTop Digital 8-30 VDC 8-30 VDC PNP/NPN 24V DC 6 mm

ASCO Series 8344 WP8344.092 4-Way Piston Poppet Solenoid Valve 3/8" NPT 24V DC

REXROTH 375 003 000 0 Air Pressure Reducing Valve M22X1.5 40 bar 3750030000

EndressHauser Liquipoint T FTW31-D1A3CA0A Conductive point level detector

HAWE TQ 54-A 5.5 Hydraulic Flow Divider G1" to G3/4"

BARKSDALE Series 6140 High Pressure Control Valve 6144R3AC3-L 3/4" NPT CC

ALCON 33B33Z5B3-5K259 ATEX SS solenoid valve 3/2 NC 1/4" NPT 24V DC 0-10 bar

OVAL Model NPI45 Valve Position Indicator NPI45B-20 726 cc

WANDFLUH AEXi4Z60a-K4-100/T6 MKZ45-100 Hydraulic Directional Valve ATEX Solenoid

PARKER 483-1/2SS1-2  Flow Check Valve 10

DALI KPVB0500450 Minimum pressure valve DL-13/8GA MPV50A

NORGREN B38-240-B2MA NACE Stainless Steel Filter Regulator 150 psi

Endress  Hauser Waterpilot FMX21 W2U4/0 P # 71082058 Hydrostatic Level Probe

HYDAC Cartridge Valve WSM 06020 2-Way Hydraulic Poppet 3003122 24V AC manif

ASCO Series 327 NF8327B001 3-Way Brass Solenoid Valve 1/4" ATEX 24V DC 0-10 bar

FESTO MPPE-3-1/4-6-010-B 161167 Proportional Pressure Regulator 0..6 bar

BARKSDALE 425X-15 ATEX Pressure Transducer 4-20 mA 0-5000 psi 1/4" NPTM

WARTSILA Typ. 603/41 123 211 00 Pneumatic Valve 5/2-Way DN10 0..40 bar Base Mtg

ASCO Series 223 SCB223A003 High Pressure Solenoid Valve 1/2" 100 bar 240/60 AC

R909157727 Rexroth Proportional Solenoid HYDAC GH 263-060/EZ 135 24 18.7 ohms

Honeywell DPTM-1000 Differential Pressure Transmitter DPTM1000

Bank of 5 FESTO 159687 MN1H-5/2-D-1-FR-C 5/2 Way ISO solenoid Valve 24V DC

Honeywell 04973-001-333-X7-00-000 P. No. 31745929 Conductivity Cell

HOLTHAUSEN Type ESW hol600 Electronic Vibration Monitoring it

REXROTH 3710290200 3/2 Way Pneumatically Operated Poppet Valve 371 029 020 0

WANDFLUH BDPSA06-A-315 #2 Sandwich Proportional Pressure Relief Valve 24V DC

Bank of 8 Valves CAMOZZI Series F Valve Island System FP2RMSA-8B-8R

Danfoss MBS5100 060N1260 Pressure Transmitter 0..6 bar 4..20mA 10..32V DC flange

PALFINGER UV305-320M Hydraulic Load Stop Valve Single Acting

ASCO SCE210B156 2/2 NC 1-1/2" General Service Solenoid Valve 230/50 AC 9 bar

Norgren Herion P/N 1520653130202400 2/2 SOLENOID VALVE 1/2" Coil # 1302 24 VDC

G.A. BRA K81DA00SP0002530 5/3 Way 3 pos. APB 1/4 NPT Solenoid Valve 120V AC

SMC VEX1 series VEX1900-20 Air Operated Regulator Valve 2"

Uchida Rexroth DB 10-2-10/100 L-53 Pilot Operated Pressure Relief Valve

SMC IZS31-380-B ionizer IZS IONIZER IZS31380B

JOUCOMATIC 26190069 4/2 Way G3/8 Pneumatic Poppet Valve 192 CNOMO valve 35700008

Parker F602 F602-16EJR/M4 High Flow Air Filter 2" internal auto drain

ASCO C901113 2/2 NC Pressure Bronze Pneumatic Angle Seat Piston Valve 1-1/2 "

REXROTH 3721981120 Changeover Solenoid Valve 24V DC with External Air-Pilot

WIKA S-10 Part No. 9013547 Pressure Transmitter 0-10 Bar G1/2 4..20mA 10..30V DC

FAIRCHILD Model 7800 TT7800-406 Electro-Pneumatic E/P I/P Pressure Transducer

Seitz Type 1069 113 313 00 3-Way Solenoid Valve G1" DN22 5..32 bar 24V DC

NABCO / NABTESCO GC-314M-V 73589682-01 Pneumatic Directional Control Valve

Johnson Controls V-4334-1001 3-Way Mixing Flare Valve 5/8" OD Tubing V43341001

VERSA Solenoid Directional Control Valve VXX-4534-H2-MS-XMAA-D024 1/2" NPT

VAT Series 264 26428-KE41-CJC1/0012 Solenoid actuated Angle Vacuum Valve 24V DC

ASCO E290A024 2/2 NC Pressure Bronze Pneumatic Angle Seat Piston Valve G2"

DUPLOMATIC MZE4/58-24 Pilot Operated Proportional Pressure Reducing Valve

REXROTH 4/180902 Pneumatic Directional Control Valve 3/2 Way M4X1.5

WABCO 2/000057-5B Pneumatic Directional Control Valve 3/2 Way M4X1.5

Rexroth Hydronorma SV30 series Pilot Operated Check Valve 315 bar 1-1/2"

GEMS Sensors FS-200 P/N 27086 Bronze Shuttle Type Flow Switch 1-1/2" NPT 3 GPM

CENTORK Type PR720 Pneumatic Valve Positioner

IMI Norgren HERION 2401147 1/4" NPT Stainless Steel ATEX Solenoid Valve 110V AC

FAIRCHILD TDFI7800-406 Electro-Pneumatic E/P I/P Pressure Transducer

GRACO 226-946 Series F01B Fast-Flo Air-Operated Drum Pump

Rexroth 3710550000 Pneumatic Directional Control Valve 3/2-Way M14X1.5

WABCO 3710290080 Pneumatic Directional Control Valve 3/2-Way M4X1.5

PALL 6400 Serie HH6400  HC6400 In-Tank Hydraulic Filter Assembly with Element

HAWE Hydraulik NV8G2 4/3 Way Hydraulic Solenoid Valve 24V DC

R431008211 Rexroth Pilotair SC-700 Special Purpose Valve PD-040031-09820

PARKER D1VP004CN4L91 Pressure Operated Hydraulic Directional Control Valve

NORGREN 1520653 1302 02400 Direct Solenoid Actuated Poppet Valve G1/2" 24V DC

FAIRCHILD Model 1500A Catalog no. 1546AT Positive Bias Relay 3/4" NPT 1-60 psi

HAWE Hydraulik Type LHK Load Hing Valve LHK 44 G-21-250/250

REXROTH Type TH7 4TH7 A06-10/M01 Hydraulic Control Valve

TRIMOD BESTA Level Switch U3B 01 041 IP68 250V AC 5A 300mA G Plated contacts