CI854AK01  CI854AK01 

單模光纖的帶寬zui寬，多模漸變光纖次之，多模突變光纖的帶寬zui窄；單模光纖適于大容量遠(yuǎn)距離通信，多模漸變光纖適于中等容量中等距離的通信，而多模突變光纖只適于小容量的短距離通信。

在實(shí)際光纖傳輸系統(tǒng)中，還應(yīng)配置與光纖配套的光源發(fā)生器件和光檢測器件。目前zui常見的光源發(fā)生器件是發(fā)光二極管（LED）和注入激光二極管（ILD）。光檢測器件是在接收端能夠?qū)⒐庑盘栟D(zhuǎn)化成電信號的器件，目前使用的光檢測器件有光電二極管（PIN）和雪崩光電二極管（APD），光電二極管的價格較便宜，然而雪崩光電二極管卻具有較高的靈敏度。

與一般的導(dǎo)向性通信介質(zhì)相比，光纖具有很多優(yōu)點(diǎn)：

1）光纖支持很寬的帶寬，其范圍大約在  1014～1015 HZ之間，這個范圍覆蓋了紅外線和可見光的頻譜。

2）具有很快的傳輸速率，當(dāng)前限制其所能實(shí)現(xiàn)的傳輸速率的因素來自信號生成技術(shù)。

3）光纖抗電磁*力強(qiáng)，由于光纖中傳輸?shù)氖遣皇芡饨珉姶鸥蓴_的光束，而光束本身又不向外輻射，因此它適用于長距離的信息傳輸及安全性要求較高的場合。

4）光纖衰減較小，中繼器的間距較大。采用光纖傳輸信號時，在較長距離內(nèi)可以不設(shè)置信號放大設(shè)備，從而減少了整個系統(tǒng)中繼器的數(shù)目。

    當(dāng)然光纖也存在一些缺點(diǎn)，如系統(tǒng)成本較高、不易安裝與維護(hù)、質(zhì)地脆易斷裂等。
1．并行通信與串行通信

    數(shù)據(jù)通信主要有并行通信和串行通信兩種方式。

并行通信是以字節(jié)或字為單位的數(shù)據(jù)傳輸方式，除了8根或16根數(shù)據(jù)線、一根公共線外，還需要數(shù)據(jù)通信聯(lián)絡(luò)用的控制線。并行通信的傳送速度快，但是傳輸線的根數(shù)多，成本高，一般用于近距離的數(shù)據(jù)傳送。并行通信一般用于PLC的內(nèi)部，如PLC內(nèi)部元件之間、PLC主機(jī)與擴(kuò)展模塊之間或近距離智能模塊之間的數(shù)據(jù)通信。

串行通信是以二進(jìn)制的位（bit）為單位的數(shù)據(jù)傳輸方式，每次只傳送一位，除了地線外，在一個數(shù)據(jù)傳輸方向上只需要一根數(shù)據(jù)線，這根線既作為數(shù)據(jù)線又作為通信聯(lián)絡(luò)控制線，數(shù)據(jù)和聯(lián)絡(luò)信號在這根線上按位進(jìn)行傳送。串行通信需要的信號線少，zui少的只需要兩三根線，適用于距離較遠(yuǎn)的場合。計(jì)算機(jī)和PLC都備有通用的串行通信接口，工業(yè)控制中一般使用串行通信。串行通信多用于PLC與計(jì)算機(jī)之間、多臺PLC之間的數(shù)據(jù)通信。

Siemens AC Semiconductor Motor Controller 3RW3455-0DC25
 

BOSCH CL 100-E 048552-105
 

Adaptronic Module Tester KT720
 
Lenze 8200 Vector E82EV552K4C
 
BOSCH BT20
 

Hugle Electronic 411N1
 

Yaskawa Servopack CACR-HR02BAB11Y5
 

Berger Lahr VRDM3913/50LWCEB Mayr 6Nm
 

HELLER UNI-PRO DIGI-DRIVE BOARD LMN-60/90A
 
Uni-Pro ACPU90-VE C?23.050052X-00158
 

Siemens Permanet Magnet Motor 1 FT5064-0AC79-1-Z
 
Siemens SP12 00341181-01 KL-M9-0323
 
Adept EXC Controller?90400-80021
 
Adstec OPM3015-009-AA
 
Siemens Permanet-Magnet-Motor 1 FT5064-0AC71-1-Z
 
Siemens Permanet-Magnet-Motor 1 FT5072-1AF71-1EH0
 

Siemens Permanet-Magnet-Motor 1 FT5072-0AF71-1-Z
 

Adept MV-10 30340-20000
 
Robohand RR-56M-90
 

National Instruments?Embedded Controller?NI PXI-8176
 

Dalsa CCD Image Capture CL-P4-6144W-ECEWCD
 

Baldor KPD-TS05M-10
 

Movomatic Front Panel ES600
 

BOSCH 0 608 750 100?LTE 12 230V~500VA
 

IAI DBL Guide Rod Encoder RCS-RA55-A-60-GD-H-300-M
 

Siemens Transformer?4AT3032-8DD40-0FD0
 

Berger Lahr Sig Positec VRDM 3112/50 LWC
 
Messer Griesheim S 225 Skid 6503575
 

Lincoln Lubriction Unit 917
 

Kulicke & Soffa Industries Keyboard CDA?08020-0120-000-14
 

Parker Compumotor APEX 6151
 

ABB Robotics PS 60/4-75-P-4787
 

Staiger Mohilo DMF-P?B100
 

Adept 9041-40043/XY-HRS 043CS110AD
 

Rexroth 0 608 820 071, 0 608 720 053,?0 608 701 014
 
Adept 90400-60131
 
Leybold SA SV25 10990
 

LFE Instrument 2010?D030006601
 

Fisher Body V200 Actuator 1052
 

Uni-Pro ACPU90-SE D?23.050054-01499
 

Baldor Motor VM3710T
 

Adept E-Stop Controller 90400-02100
 

Siemens SITOP Power?40 Power Supply 6EP1437-1SL11
 

Siemens Power Supply?6ES5951-7LD21
 
Hitachi YTS 24DH H-SERIES YTS24DH 2KKCC
 
Arburg 658 139.931 a
 

Exlar GS45-0602-0SA-PS1-M6
 

Heinzinger PTN 16-20?Power Supply
Berger Lahr Stepping?Motor VRDM 568/50 LHC
 

Novotechnik TRS 100
 

Astec RPS4-PO-115/230-716 P/N 69-250-716
 

Terra Universal Desiccator Dual Purge System
 

Springer Co-AX MK252C116TVB1P2AXB
 
Rexroth Hydraulics 587 560 SL30 PA 1-42
 

SMC ITV2050-40N3BL3?E/P Regulator
 

Control Technology Corporation 4160
 
Schunk LSE20-4-90 P/N355224 Swivel Unit
 

Borries Markier-Systeme D-72124
 

IAI Inligent Actuator RCS-RA55-A-100-GN-M-100-T1-N-B IA01833
 

Herion Cooling Water?Flow Reg
 

SMC CYLINDER MY1M50G-700LH
 

Parker XLB12-16AP1-EF-B
 

Sron Motoreducer?FLGR2-1-R-0--1.250-.81
 

SMC EMXS25-50
 

Parker Compumotor SM233BE-N
 
Trumpf Interface Board 0786879
 

IFM electronic Monitor FR-2 DD2005
 
Allen Bradley Control Matched Motor CM103-FCF3318GEKFA
 
Abnox MDL620
 

Noro 71 L/4 2S50NB/AZD-71 L/4
 

Siemens 4AM6442-8DD40-0FA0
 

Balluff BIS C-6023-025-050-03-ST13
 
Atmel Grenoble 2 Units TH78CF13ACC
 
Phoenix Contact InterBus IBS SAB 24 DIO4/4/2
 

Tox Pressotechnik S4.150.6
 

Allen Bradley Contactor Module 190-A40A
 

Gossen Konstanter 34?G 60 R 5,5
 

Warren Rupp Sand Piper II S05BIPIPPNS000
 

MicroE Systems 100-00129
 

Balluff BES IKV 045.23 GZS4
 

Fujinon Tv Lens CF50HA-1 1:1.8/50mm
 
Superior SLO-SYN Motor KML092F13 Stepping Motor
 

Festo Guide Unit DFM-50-50-P-A-KF 170947
 

Leica GZ6 Eyepieces?15X/15.6
 

Siemens Subrack Simatic S5 6ES5 700-2LA12
 

Omega Thermometer Infrared OS550 Series?OS551-V1-6
 

Sill Optics S5LPJ1362 100533
 

Branson Ultrasonic Welder Booster Green?with Gold Ring
 
Adept Dual B+ AMP 10338-53000
 

Introl Design Brushless Servo Motor SL50A-18IS-0500AN-1226
 

Yaesu Hios CLT-75 C-7506
 
Panasonic AC Servo Driver MSDA043A1A
 

SMC Pneumatic MHQG2-32D
 

Omron SYSDRIVE 3G3EV-AB004M-E
 

Atlanta 58 43 907 Gear Unit
 

Kulicke & Soffa Servo Preamp 8001-4045 N08001-4045-000-05
Endress+Hauser Level?Limit Switch FTL50-LGR2AA2G5A
 

MAC 2MX4-56416 B2658-3 MX VOLT 208-220/440
 

Phoenix Contact InterBus IB STME 24 DO 32/2, 2754370
 

Dipling Nophut BN-8831.00.1*S-00 96191
 

Siemens Standard TEFC Induction Motor RGZ Hp 2
 

Cuno Filter CT101 47783-03
 
Dalsa CL-P4-6144W-ECEWCD
 

Sika Electronic TLK?41
 
Berger Lahr Inverter-Duty Motor VRDM368/4LWCOO
 

Weber ServoLoc 1 S1A70825
 

Siemens key Board SIN 880 6FC5103-0AC03-0AA0
 

Sensotec 060-7472-01
 

Siemens Control Relay 3TH42 44-0BB4
 

Rexroth Bus Module?187030166
 

Eletta V1-GL40
 
Ergonomic Two Hand No Tie Down 12-2002-04-9A-REC-10
 

Vogel Stattmannstr Gearbox 311437
 

Bosch Servo Motor 0?608 701 013
 

Baldor Brushless AC?Servomotor W040/1599
 
Hanning Elektro-Werke D-Motor VDE0530 440-480V
 

Kulicke & Soffa Controller 8001-4062 N08001-4062-000-14
 

Tsubaki Gear Motor GMTA010-38L200Z Ratio1:1200
 

Dunkermotoren GR 63X25 47R01 & SG80 47R01
 

IEF Werner 56/2P/6A/1,2Nm/SD 736825
 

Kulicke & Soffa 8001-4009 Z AMP N8001-4009-000-08
 
Kulicke & Soffa 8001-4014 MS AMP N08001-4014-000-07
 

Newly listed?Barnstead Thermolyne?Mirak Hotplate SP73235-60
 

Siemens AS-Interface?3RX9305-0AA00
 

RTi Oil Extractor Combo 4P-060-PP4-DCi
 

Warner Electric ERD5?5UE005A21P1 5.0 Nm?24Vdc 20 W
 

IMD-310/5F
 

Kulicke & Soffa Unibody Transducer 120KHZ Ball 08021-0083-000-08
 
Tamron 23FM50L 50mm?1:2.8
 

Johnson Controls P445NCB-25C
 

SMC EMXS20L-75
 

Coors Ceramic Company 60198 80ml Box of?24
 
Hoerbiger 25-2020/20x5.72-BM
 

SMC Cylinder MTS40-125M
 

Keyence Inductive Gauging Sensor EX-502
 

Wheaton Boro Bottle?1000 ML Case of 12
 

Festo DPZJ-16-10-P-A-S2 159945
 

SMC Multistage Ejector ZL212-E65L
 

SMC Multistage Ejector ZL112-E65L
 

Sony Magnescale MSD-705
 

PHD Cylinder TS041X3-D-H4-M-N
 
Berger Lahr SIG Positec VRDM 566/50 LHB
 

Honeywell Thermostatic Expansion Valves?TMVX-00105 TMVX R134a
 

Allen Bradley Power?Flex 40 22B-D1P4N104SER A
SMC MXS6-40
 

Burster Potentiometric Displacement Sesors 8712-10
 

RKC Rex C100 c100FK02-M*NN Z-182A
 

Lumberg ASBS 8/LED5-4 8 port
 

Afag GMQ 20 20/P
 

Siemens 3RA1110-0EA15-1BB4
 

Ropex Industrie-Elektonik Alarm WMSS 402868 WMGS-1B 402867
 

Watlow Series 982 982C-20CD-JDRR
 

Simco Power Unit C2?0820516700
 
Weber WN 103009 Bi10R-W30-DAP6X-B6130
 

Allen Bradley 1794-TB32S Ser A
 
Reliance Dodge Tigear MR94754L1 C VY
 

Ropex Industrie-Elektonik Linear Displacement Transducer WA-85-2
 

Dataforth LDM422
 

Schmersal AZM 170SK-02ZRKA 24VAC/DC
 

RKC Rex C100 c100FK02-V*NN
 

Siemens SITOP Power?20 6EP1436-3BA00
 

Elephant Demagnetzer?EDZ-E1
 

Tol-O-Matic BCS#204648 BCS10 BN08 SK17 RT2 LMI
 
Siemens 3TH30 22-0BB4 Control Relay
 

Euchner N11D 012247
 

Applied Motion Products step Motor 5023-169D
 

Parker Stepping Motor ES33B-DKR10
 
TJS, Inc Oxygen/Mixed Bed Cartridge Z50221
 

Namco Limit Switch EA150-30275
 

Volpi AG CH-8952
 

Oriental Motor Control Pack SS21M-SSSD
 

Euchner Safety Switch TZ2RE024SR6 049102
 

Sony Magnescale Dector Model: MSD-705
 

Tamagawa AC Servo Motor 3275N563E29
 

Asco HB30A224
 

Festo VIGE-03-FB-8-5POL
 

Festo FRC-1-D-5M-MAXI-NPT LFR-D-MAXI LOE-D-MAXI
 

Mikro Elektronik 04M028-00 (R)
 
Mikro Elektronik 04M035-20
 

Mikro Elektronik 04M008-00
 

Adept VFP Category 1?30332-00380
 

Thomas 107CEF18 F
 

Tol-O-Matic HB#186542 HB17 SK06 RT2 LB BP
 

Prosys DN-110 SN102
 

Fostec Ace I 20500
 

Humphrey Solenoid Valve T062 4E2 CD
 

Banner Safety Switch?SI-LS42DMH 47877
 
Oriental Motor AC Magnetic Brake Motor 2RK6GN-AWM
 

Parker Series 02.50?CF2MAUS34A 24.000
 

Mikro Elektronik 04M045-01
 

Mikro Elektronik 04M052-00
 

Tol-O-Matic HB#395678 HB17 SK06 LB RT2 BP