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。

以下链接皆有货

Leader Function Generator LFG-1300S

M-AUDIO BX5 D2 Speaker

KRAMER DIGITOOLS DVI PATTERN GENERATOR 840

Fairbanks Scales Ultegra SCB-R9000-14V Scale *NEEDS CALIBRATION*

NETGEAR ProSafe® 48-Port Gigabit Smart Switch with PoE and 4 SFP Ports GS752T

Watt WB-400 VCE-12 Outlet Power Conditioner

Araknis Networks AN-300-SW-R-24 24 Port Managed Gigabit Switch

HOLLAND ELECTRONICS HMA-550

Fujitsu N7100 Network Document Scanner

AMX MXT-1001 CONFERENCING CENTER

Zebra ZD500 Direct Thermal Label Barcode Printer

Dahua VC-EB18TG1-IZS 8MP IP Camera

Innovolt Digital Surge Protector PM30-240L | 240VAC | 30Amp

Gemini UX 1600/ UF-1064 UHF Wireless w/ UB-68/FB-64  1 POWER ADAPTER

Marantz PMD201 Portable Cassette Recorder Player

 Marantz PMD201 Portable Cassette Recorder Player

IPEVO V4k CDVU-08IP Ultra High Definition USB Document Camera

Netgear ProSafe GS728TP 24-Port Gigabit Switch

Swivl CX Robot SW4138D Video Camera Tracking

Orion 15RTC 15"TFT LCD Color Monitor

Mailfoundry 2100 Rackmount 6-Port 10/100 Anti-Spam

AudioCodes MP-124D/24FXS/3AC VoIP Gateway MediaPack

CYBEX AUTOBOOT COMMANDER 4XP

OPEN MESH OM S48 Port Gigabit PoE Cloud Managed L 2 Switch With 4 dual speed

Poly Plantronics Savi 7210ice Black Headset

TASCAM DR-100 MKII Portable Linear PCM Digital Recorder

Brother P-TOUCH QL-500 Thermal Label Printer With Power Cable

G-622 GTD Audio Dual Channel Wireless MicrophReceiver

LUMA LUM-500-NVR-4CH Network Video Recorder NVR w/ Power Adapter 1TB HDD

Cisco ASA 5506-X V04 Network Security Firewall Appliance w/ Power Adapter

Cisco ASA 5508-X Security Network Firewall Appliance

Epson Thermal Receipt Printer, TM-T88i, Model M265A

Cognitive TPG DBD42-2085-G1E Thermal Label Printer

Dolby DP569 DIGITAL AUDIO ENCODER

Cisco WebEx DX80 Touchscreen Video Conference Unit  Works

GENERAL ELECTRIC 1CVM6060E VHS MOVIE VIDEO SYSTEM

Epson WorkForce ES-400 Duplex Document

Plessey Microsystems PME 68-12 VME Interface

NETSCOUT C8-1G 8-LINE TAP 2x AC POWER

Ambery IP-P3 Professional Remote IP Power Distribution

SHORETEL IP480G IP PHPN 630-2099-20 IP PHONE

Cisco Meraki MR53E-HW Cloud Managed Access Point UNCLAIMED

Asus CD/DVD DISC Duplicator Burner

Tauri 156 NEB215 Infrared Temperature Check

TSC TDP-244 Thermal Label Printer

Eaton (TPC2104) 1U Basic ePDU 100-240V

OKI Model LD620D Thermal Label Printer

Samson Expedition XP40iW Portable PA System NO POWER ADAPTERS

BIAMP Nexia VC Video Conference DSP Digital Audio Processor System

BIAMP Nexia TC Digital Audio Signal Processor

Buffalo Technology TeraStation TS3400D0404 NO HDD

Kodak ScanMate i1150 Color Duplex Document Scanner

AKG DSR 70 Digital Stationary Receiver

Panasonic CF-WEB194A

Xerox Documate 3120 Scanner

Tripp-Lite PDUH20HVL6 Single-Phase 208/240V Basic PDU 14-Outlet Rack Mount

Fujitsu N7100 Color Sheetfed Scanner

Cisco Meraki MX84-HW Cloud Managed Security Appliance UNCLAIMED

QNAP TurboNAS TS-259 Pro

Videonics Video Titlemaker 2000 Model TM 2000 NTSC

NEC PX-PC00-A 9A Board 9A 04-03 TR

Autocue Canvys Q--V5-1MM

SWIVL Robot Model SW3322G with Case and accessories

Zebra ZD420 Thermal Transfer Printer

Brother Image Center ADS-2000e Document Scanner

HDView CCTV Distributed Power Supply  for Security Camera, PTC Resetable Fuse

MARTIN RANGER UWM -5000 UHF TWIN CHANNEL PLL Wireless microphreceiver

DP Plus A21201 Digital LNBF

Xerox DocuMate 252 Pass-Through Scanner

SACOM DS8800 Digital Spectrum Series 8-module Wireless MicrophReceiver

KANEXPRO 4K60Hz HDMI Cascading Extender Over Cat6 RX Unit

45980-0000 ARC R-1043A Glideslope Receiver with Mod

SONY EV-C3 NTSC VIDEO CASSETTE RECORDER

M077 NANYA PLASTICS CORP CK 66 UL94V-0 M077 LCD board

TRENDnet TK-1603R 16-Ports Rack- Mountable KVM/USB

Go Video Dual Head Model DDV9500 VCR Recorder Player No Remote

FingerTec TA200 PLUS FINGERPRINT BIOMETRIC Time Punch Clock Attendance SYSTEM

Mayflash F500 Elite Arcade Stick For PS3/4 X 360 X Android

DIGITAL COMPACT DISC PLAYER FISHER AD-844

InFocus Model IN114 Black Projector

Digital Loggers Redundant Ethernet Power Switch Voltage/Current Monitor

DATAMAX O'Neil USB Barcode Thermal Printer E-Class Mark III E-4205A

Hikvision DS- 7616NI-E2 Network Video Recorder w/ 4 TB HDD

Datavideo DAC-50 HD/SD-SDI to HD/SD-Component Y:U:V Converter

AlcatelLucent TNT-SL-E100ND-C Ethernet Card

Panasonic WV-RC36 Remote Control Unit

Motorola WPLN4071AR 4 Unit Battery Optimizing System

Juniper EX2200-24T-4G 24-Port Gigabit Managed Switch

Wasp WPL305E Barcode Thermal Label Printer

BEMATECH MP-4200 TH Thermal Receipt Printer

My Weigh HD-150  Receiving Scale

MartinSound MultiMAX EX Multiformat Monitor Remote Controller

Epson DS-510 J341A Color Document Pass-Through Scanner

Go-Video DDV3110 Dual Deck VCR

Blackmagic Design Broadcast Converter 922971

Rolls RM203 Stereo Line Mixer

Genuine  Rimage Everest 400 600 CMY Ribbon 2002161

INTEL SERVER BOARD AXX6DRV3GEXP

APC AP5202 16-Port Multi Platform Analog KVM Switch

Valcom V-1046-BK Talkback SlimLine Black Wall Speaker

Canon Speedlite 580EX II Shoe Mount Flash for Canon

DataRemote CDS-9070 LTE Cellular Router w/Bracket  Antennas

Zebra UPS LP2844 Label Thermal Printer

Brother QL-1050 Touch Wide Format Direct Thermal Label Printer

ANTEC 25 EarthWatts 500 Green Power supply

Lot of 7 Kensington K64560US ComboSaver Combination Portable ebook Lock

Datavideo DAC-50 HD/SD-SDI to HD/SD-Component Y:U:V Converter DAC-50

CISCO SYSTEMS N7K-SUP2 V01 Ethernet Switch

REVOLABS 01-ELITEEXEC4 Executive ELITE Wireless MicrophSystem

Sony SLV-D350P DVD PLAYER VIDEO CASSETTE RECORDER

DSX-1022 DOOR ACCESS CONTROLLER

ATT i-COS/4 9113789-8 Code Operated Switch

Dahua DHI-DB11 2MP WiFi Video Doorbell

Dahua DHI-VTNS2003B-2 Two-wire Switch For Video Intercom Systems

Sonus SBC 1000 Switch ( SBC-1K-BRD-AME )

UNV ET-B31H-M Face Recognition Access Control

CISCO AIR-CAP1552E-A-K9 OUTDOOR MESH WIRELESS ACCESS POINT

Startech Mountable Rugged Industrial 7 Port USB 2.0 Hub

SENNHEISER SZI 1029-T-120 IR POWER RADIATOR

ENS Techtower 367-4005-03-A Base ONLY

KANEX PRO SP-HBDT1X4 Splitter 1x4 PoC

Plugable UD6950H USB 3.0 Dual 4K Display Horizontal Docking Station

Startech ST122UTPA VGA Video and Audio over Cat5 Mini Extender

Dahua DHI-VTNS2003B-2 2-Wire Switch for Video Intercom

Polycom MPTZ-11 Video Conference Camera ( 1624-66061-002 )

EtherWAN EX-LS38-C3L-TC-N-EB SFP Transceiver Module

EtherWAN EX-1250TBP-MB1L Single LC SFP Transceiver Module

MicroStar MS-6547 DDR Motherboard NO CPU / RAM

orack UB802 Ultra-Low Noise 8 Input 2 BUS Mixer

LG BH100 Super Multi Blue Player

Shure ULX1-G3 Wireless Bodypack Transmitter 470-506 MHz

Pakedge S8HAV 8 Port Gigabit Ethernet Switch