(3)晶体管输出：

　　最大优点是适应于高频动作，响应时间短，一般为0.2ms左右，但它只能带 DC 5—30V的负载，最大输出负载电流为0.5A/点，但每4点不得大于0.8A。

　　当你的系统输出频率为每分钟6次以下时，应首选继电器输出，因其电路设计简单，抗干扰和带负载能力强。当频率为10次/min以下时，既可采用继电器输出方式;也可采用PLC输出驱动达林顿三极管(5—10A)，再驱动负载，可大大减小。

　　2、抗干扰与外部互锁当 PLC输出带感性负载，负载断电时会对PLC的输出造成浪涌电流的冲击，为此，对直流感性负载应在其旁边并接续流二极管，对交流感性负载应并接浪涌吸收电 路，可有效保护PLC。当两个物理量的输出在PLC内部已进行软件互锁后，在PLC的外部也应进行互锁，以加强系统的可靠性。

　　3、“GOM“点的选择不同的 PLC产品，其“COM”点的数量是不一样的，有的一个“COM”点带8个输出点，有的带4个输出点，也有带2个或1个输出点的。当负载的种类多，且电流 大时，采用一个“COM”点带1—2个输出点的 PLC产品;当负载数量多而种类少时，采用一个“COM”点带4—8个输出点的PLC产品。这样会对电路设计带来很多方便，每个“COM”点处加一熔丝， 1—2个输出时加2A的熔丝，4—8点输出的加5—10A的熔丝，因 PLC内部一般没有熔丝。

　　4、PLC外部驱动电路对于 PLC输出不能直接带动负载的情况下，必须在外部采用驱动电路：可以用三极管驱，也可以用固态继电器或晶闸管电路驱动，同时应采用保护电路和浪涌吸收电 路，且每路有显示二极管(LED)指示。印制板应做成插拔式，易于维修。

　　PLC的输入输出布线也有一定的要求，请看各公司的使用说明书。

　　三、扩展模块的选用

　　对于小的系统，如80点以内的系统.一般不需要扩展;当系统较大时，就要扩展。不同公司的产品，对系统总点数及扩展模块的数量都有限制，当扩展仍不能满足 要求时，可采用网络结构;同时，有些厂家产品的个别指令不支持扩展模块，因此，在进行软件编制时要注意。当采用温度等模拟模块时，各厂家也有一些规定，请 看相关的技术手册。

　　各公司的扩展模块种类很多，如单输入模块、单输出模块、输入输出模块、温度模块、高速输入模块等。 PLC的这种模块化设计为用户的产品开发提供了方便。

　　四、PLC的网络设计

　　当用PLC进行网络设计时，其难度比PLC单机控制大得多。首先你应选用自己较熟悉的机型，对其基本指令和功能指令有较深入的了解，并且指令的执行速度和 用户程序存储容量也应仔细了解。否则，不能适应你的实时要求，造成系统崩溃。另外，对通信接口、通信协议、数据传送速度等也要考虑。

　　最后，还要向 PLC的商家寻求网络设计和软件技术支持及详细的技术资料，至于选用几层工作站，依你的系统大小而定。

　　五、软件编制

　　在编制软件前，应首先熟悉所选用的 PLC产品的软件说明书，待熟练后再编程。若用图形编程器或软件包编程，则可直接编程，若用手持编程器编程，应先画出梯形图，然后编程，这样可少出错，速 度也快。编程结束后先空调程序，待各个动作正常后，再在设备上调试。

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*如果您需要订购产品超过1件，请与我们联系，我们可以为您提供折扣。

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*请让我们知道您有任何，备品，备件，的需要，我们可以给您进一步的援助，我们等候您的询盘。

【主营产品】

1：Invensys Foxboro（福克斯波罗）：I/A Series系统，FBM（现场输入/输出模块）顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、数据通信及处理等。

2：Invensys Triconex: 冗余容错控制系统、基于三重模件冗余（TMR）结构的最现代化的容错控制器。

3：Westinghouse（西屋）： OVATION系统、WDPF系统、WEStation系统备件。

4：Rockwell Allen-Bradley: Reliance瑞恩、SLC500/1747/1746、MicroLogix/1761/1763/1762/1766/1764、CompactLogix/1769/1768、Logix5000/1756/1789/1794/1760/1788、PLC-5/1771/1785等。

5：Schneider Modicon（施耐德莫迪康）：Quantum 140系列处理器、控制卡、电源模块等。

6：ABB：工业机器人备件DSQC系列、Bailey INFI 90等。

7：Siemens(西门子)：Siemens MOORE， Siemens Simatic C1，Siemens数控系统等。

8：Motorola（摩托罗拉）：MVME 162、MVME 167、MVME1772、MVME177等系列。

9：XYCOM：I/O 、VME板和处理器等。

10：GE FANUC(GE发那科)：模块、卡件、驱动器等各类备件。

11：Yaskawa（安川）：伺服控制器、伺服马达、伺服驱动器。

12：Bosch Rexroth（博世力士乐）：Indramat，I/O模块,PLC控制器,驱动模块等。

13：Woodward（伍德沃德）：SPC阀位控制器、PEAK150数字控制器。

14:工业机器人系统备件。

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RELIANCE ANALOG INPUT MODULE 57409-B

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RELIANCE 6SP501-3P9CTNN SP600 3HP 600VAC DRIVE ***NIB***

Electro-Craft RELIANCE ELECTRIC F-4030-Q-H00AA SERVO MOTOR

RELIANCE ELECTRIC VTGA CONTROL BOARD 0-52876 NEW *PZB*

ONE  Reliance Electric 57405-E /D-2715

RELIANCE ELECTRIC 0-51381 CONTROL BOARD 051381

RELIANCE ELECTRIC 57C492 BATTERY BACKUP

Reliance Electric AC VS Drive GP 1500

Reliance 0-52824 One Year Warranty !

 Reliance Electric 2GU41015 15 HP Variable Frequency Drive GP-2000

Reliance Electric OLVD 0-52808-3 RE  0528083 PCB PLC Module 0-528083 R E

Reliance Electric 0-57413-E AutoMaxCommon Memory Module PLC J-3636 057413E Auto

NEW NO BOX RELIANCE ELECTRIC 0574043A  Automax Network module 0-57404-3A

Reliance Electric Controller DDS-P12 DDS P 12

Reliance Electric 0-57408-1C Power Module Interface 0574081C 57408-1C

Reliance 0-57412 One Year Warranty !

Reliance Electric Remote I/O Interface  45C37B   V001ZZ  Item#: 2487

LIQUIDATION Reliance Electric Remote I/O Interface  45C37A    Item#: 2488

RELIANCE ELECTRIC 0-51845-2 NEW PRECISION REFERENCE SUPPLY CARDPACK PRSC 0518452

Reliance 0-51811-7 One Year Warranty !

RELIANCE ELECTRIC 45C994 CP-3806 0-10V ANALOG OUTPUT MODULE NEW

RELIANCE ELECTRIC (ABB) 0-52808-3 PC BOARD O/L V OLVD 0528083

RELIANCE ELECTRIC 603515-5A **

RELIANCE ELECTRIC 0-52859-2 PC BOARD VOLTAGE SOURCE SEQUENCE VSDC 0528592 NIB

NEW RELIANCE ELECTRIC DRIVE 6MDBN-024102 7.5HP 240VAC 3PHASE

RELIANCE ELECTRIC BUS POWER DRIVE 56915-21C / 56951-301AA NO COVER

RELIANCE ELECTRIC AUTOMATE REMOTE I/O INTERFACE PROG. CONTROLLER 45C37A *PZB*

RELIANCE ELECTRIC TACHOMETER GENERATOR  5BC 42AB2131A

Reliance Electric 0-60044-A 802284-181B Circuit Board Assembly 99727-784 9802

8034200-reliance electric - 803.42.00/ drive circuit board sfb

RELIANCE ELECTRIC 7403829001 MOTOR **New no box**

Reliance Electric R18G4903 Energy Efficient A/C Motor

RELIANCE ELECTRIC SERVO MOTOR Y-2012-H00AA

RELIANCE ELECTRIC A-C VS DRIVE GP-2000

7.5HP Reliance Electric Motor 254T frame  [1150 RPM]

1 NEW RELIANCE P14G7727 1 HP ELECTRIC MOTOR ***MAKE OFFER***

Reliance Electric 2SR21200 D2-3291 Snubber Resistor

Reliance Electric ISU51003 AC Drive 1YR WARRANTY

Reliance Electric Interface Card M# 413338-1YB ~NIB NEW SURPLUS~

Reliance Electric 14C30 MinPak Plus DC Motor Drive 3/4HP 90VDC @ 7.5A

RELIANCE ELECTRIC 0-51831-6 PC CURRENT VOLTAGE TRANSDUCTOR *NEW NO BOX*

Reliance Electric HR2000 Brushless AC Servo Type - 3RA2001 - 

Tigear Gear Reducer R374353 001 QY with Reliance Electric Duty Master  1HP 3 PH

25 HP Reliance Electric Motor, 1200 RPM, 324T 326T Frame, TEFC, 460 V

RELIANCE ELECTRIC 804113-R , AUTOMAX 6011 PROCESSOR MODULE M/N 57C431 #217270

RELIANCE ELECTRIC CARDPAK 0-49063 CURRENT GATE MODULE **

Reliance Electric 45C27B Gateway Interface Head

Reliance Electric 57406-F Drive Controller BCK

Reliance Electric Resistor Assembly UDC Scaling Moduel 805403-2R *New*

RELIANCE 45C307B AUTOMATE 30 PROCESSOR CARD 8K ENHANCED D553441

RELIANCE ELECTRIC P28631036 MOTOR **New no box**

RELIANCE ELECTRIC GV300E-AC024-AAQ-DBU

Reliance Electric GV3000E-AC008-AA-DBU

ONE  Reliance Electric 0-57404-2B /57C404B

RELIANCE ELECTRIC AUTOMATE 45C1A I/O PROGRAMMABLE CONTROLLER W/ DUAL MODULES

RELIANCE ELECTRIC 802802-7RD 45C1A AUTOMATE PROGRAMMABLE CTRLR W/ 45C40 MODULES

RELIANCE ELECTRIC 802802-7RD 45C1A AUTOMATE PROGRAMMABLE CTRLR W / 45C60 MODULES

RELIANCE ELECTRIC 0-48680-100 CONTROL MODULE MD-68216, 048680100

RELIANCE ELECTRIC 5PY59JY27 TACHOMETER GENERATOR

RELIANCE ELECTRIC DRIVE ASSEMBLY 294551R

Reliance Electric 45C201C Remote I/O Processor AutoMax PLC 45C201 C B/M 802820

RELIANCE ELECTRIC 0-52712-6 OUTPUT CARD

NEW Reliance Electric 0-60044-01 AC Line Sync Card PLC Module 39541-549 RE NIB

Reliance Electric 15 HP P25G5274-30 254T Frame Motor (MOT2736)

RELIANCE ELECTRIC AC VS DRIVE 2HP 1AC2102 1AC2102-ZK-024  208-230V 2 HP

NIB 612232-1W BALDOR RELIANCE 6122321W PANEL METER FREESHIPSAMEDAY

RELIANCE ELECTRIC REEVES 9205 1-3/8 X-V PULLEY ASSEMBLY P/N H95510 NEW NO BOX

RELIANCE ELECTRIC UNIVERSAL DRIVE CONTROL CONTROLLER PLC MODULE CARD 57552-1

Reliance Electric 0-52806-1 Tach Loss Overspeed Board

Reliance Electric 0-60027-2 LPI Board PLC AutoMax 802284-166D 062094 060027 RE

NEW CCRA 809'44-00 CONTROL BOARD

Reliance Electric 1326AB-B410G-21  Electro-Craft Servo Motor

RELIANCE ELECTRIC 73126-6R **

RELIANCE 1SU51002 ELECTRIC DRIVE SP500

RELIANCE 1SU54002 ELECTRIC DRIVE SP500

NIB  Reliance Interface Card RIA   413338-1YB

 RELIANCE ELECTRIC 0-56921-606 PC BOARD REGULATOR HP GV3000 SE 056921606

RELIANCE 7.5 HP  1770 RPM  213T TEFC DUTY MASTER XE Premium  ELECTRIC MOTOR

RELIANCE ELECTRIC / AC SERVO MOTOR / BLM-2202-PS

RELIANCE ELECTRIC 5PY59JY27 TACHOMETER GENERATOR 2500RPM REPAIRED

Reliance GV3000/SE Variable AC Drive VFD 1HP 200-230VAC 3Ph w/ No Cover *Tested

Reliance 57C329 Lifetime Warranty !!!

RELIANCE ELECTRIC FLEXPAK PLUS 14C301 DRIVE 15HP WE107172-001

RELIANCE ELECTRIC CO. 57456-B INPUT MODULE *NEW NO BOX*

RELIANCE ELECTRIC 45C37B 120/240VAC 50/60Hz AUTOMATE REMOTE I/O INTERFACE

NEW RELIANCE ELECTRIC 0-52712-6 OUTPUT CARD 801414-26A, 0-54121-1S-762, 0527126

Reliance Electric 0-54307 Transmitter Card 054307 New

2 Reliance A-C./1 Reliance D.C./2 Marathon Electric/Grace Motor 226-816 (6total)

Reliance Electric Rectifier Stack 86475-S

RELIANCE ELECTRIC 1326AB-B530E-21 SERVO MOTOR 155326 Inventory Lot 13

RELIANCE ELECTRIC SP500 *NEW IN BOX*

Reliance Electric Baldor14C101 Flexpack Plus VS Drive 1/4-3/4hp .75hp VFD NEW

NEW Reliance Electric Electrocraft Servo Motor 1326AB-B410J-21

Reliance Electric 78177-1W Thyristor  Rectifier *XLNT*

RELIANCE ELECTRIC 1AC4002U A-C VS GP-1200 DRIVE 2HP

NIB RELIANCE ELECTRIC 0-54335-1 PILOT RELAY PC BOARD CARD

RELIANCE 413366-1AG / F52A0621M ELECTRIC BRAKE (NEW IN BOX)

REMANUFACTURED RELIANCE ELECTRIC 57140 PC BOARD 0-57140

NEW RELIANCE ELECTRIC P21F1010 AC MOTOR 10HP 230/460V 215TC

RELIANCE ANALOG INPUT MODULE 57409-C

Reliance Electric 805401-1S DC Power Module Interface Rack PLC AutoMate 0-60030

Reliance Electric 6MDDN-8P7101 5 HP 3 Phase 342-528 VAC VFD MD60 6MDDN8P7101

RELIANCE ELECTRIC DDM-030 SERVO DRIVE P/N 9101-1396 ---0% VAT INVOICE---

RELIANCE GV3000/SE 2V4160 SENSORLESS 1HP AC DRIVE  *TESTED*

RELIANCE ELECTRIC AUTOMAX 7010 PROCESSOR MODULE 57435-K

Reliance Electric 57C411 Resolver Module Rev 11 - New No Box

RELIANCE ELECTRIC PMI PROCESSOR  T07 7EX 01 99604-167 9714 SEE PHOTO'S #D970

RELIANCE ELECTRIC 0-60007-3 POWER SUPPLY MAKE AN OFFER TODAY STOCK*K563

RELIANCE 086466060V/86466-60V RECTIFIER STACK ***NNB***

Reliance Electric GV3000 1V2160 FRN 6.08 1 HP 230 VAC Tested Good Cracked Cover

Reliance Electric S-78720 S78720 GPA-1 Card - New No Box

Reliance Electric 0-51839-11 05183911 PC Board IRCJ 2392 - 

Reliance Electric 0-51839-11 05183911 PC Board IRCG  T315 1651 - 

Reliance Electric 0-51902 051902 Driver Card Board Assembly

Reliance Electric 78093-1R Contactor 780931R - 

Reliance Electric R45G1000M Tachometer Generator

RELIANCE ELECTRIC 61C351A ANALOG RAIL *NEW NO BOX*

Pp475 Reliance Electric gmi-s06 md-b3005e gpi-1 md-b3006c md-b3011g

RELIANCE ELECTRIC CARDPAK 0-49063 CURRENT GATE MODULE (AS PICTURED) **

RELIANCE ELECTRIC AUTOMATE REMOTE I/O INTERFACE 45C37A NEW

RELIANCE SERIAL COMM PROCESSOR 45C203 NEW IN BOX

RELIANCE ELECTRIC AUTOMATE REGISTER OUTPUT CARD 45C381B NEW

RELIANCE REGISTER OUTPUT CARD 45C381B NEW

0-56921-606 RELIANCE ELECTRIC CONTROL BOARD GV3000SE 056921606

RELIANCE ELECTRIC AUTOMATE  REMOTE I/O INTERFACE 45C37B

ONE  RELIANCE ELECTRIC 57409-J /57C409

Reliance Electric Tachometer Generator T56S2104A 1hp DC Electrix Motor #3403SR

RELIANCE ELECTRIC DRIVER BOARD 0-57170-2 0571702 0 57170 2 CA5000456

ONE  Reliance Electric 0-57404-3A / 57C404C

ONE  Reliance Electric 57404-3 /57C404C

ONE  Reliance Electric 57404-3A /57C404C

RELIANCE ELECTRIC P1861176-34-G6-XE MOTOR 460V 3PH 1750RPM 6.10A P1861176A

Reliance Electric 5RA0200 Amplifier 200W

New Reliance Electric Base Power Supply Driver - 0-48680-211

RELIANCE ELECTRIC RELAY BOARD 0-51490 *NEW NO BOX*

RELIANCE ELECTRIC PC BOARD 802286-62A *PZB*

RELIANCE ELECTRIC DDS-TLII 60A 11KW AC DRIVE CONVERTER CNV-TDR 60A *PZB*

Reliance Electric GPI S04 AC/AC Convertor 762.19-15 380/415V 3.9A 150140

RELIANCE ELECTRIC 57C435/804105-R/J-3650 AUTOMAX 7010 PROCESSOR ***XLNT***

AW0016-6496 REV C2 FOR DM-20 BRU-200 RELIANCE ELECTRIC 12M WARRANTY ID25608

RELIANCE ELECTRIC 0-57140 REGULATOR CARD

RELIANCE ELECTRIC 804105-R PROCESSOR MODULE 57C435-F, 57C435, 804105R, J-3650

RELIANCE ELECTRIC 810.90.11I DRIVE BOARD GVD 8109011I REPAIRED

RELIANCE ELECTRIC 0-56921-604 PC BOARD REGULATOR 56921-604 REPAIRED

Reliance 57C409 Lifetime Warranty !!!

RELIANCE ELECTRIC FAN ASSEMBLY KIT 115V, 705328-R

RELIANCE ELECTRIC: INVERTRON BMI-S04 762.20.10

RELIANCE ELECTRIC PRSC  0-51845-2 PRECISION REFRENCE SUPPLY

RELIANCE ELECTRIC 14C103-1U FLEXPAK PLUS DRIVE 14C1031U

reliance electric 0-49012-a cardpak voltage sensitive electronic relay

RELIANCE ELECTRIC AUTOMATE 30 PROCESSOR MODULE 45C307 / 802820-87R

New Reliance Electric 0-48680-215CA O-48680-215CA  Rail Interface PCB PLC

Reliance Electric 61C150 Shopmax 704261-32RA *Tested Refurbished*

RELIANCE ELECTRIC STATIC SEQUENCE MODULE  0-51874 NIB

Reliance Electric 0-57408/057408/057408C   NEW !!!!!!!!

RELIANCE 0-51845-1 PRSB NIB SEALED 0518451

RELIANCE ELECTRIC 2V4160 GV3000/SE SENSORLESS ENHANCED AC DRIVE

RELIANCE ELECTRIC 2DB4010 DRIVE MOTOR DYNAMIC BRAKING KIT UNIT 1-10HP CONTROLLER

Reliance Electric Current Loop Driver 0-51865-1 New #22463

1 NEW RELIANCE 57409-E 2-CHANNEL ANALOG INPUT MODULE

RELIANCE ELECTRIC GV3000/SE 3 HP 3V4460 DRIVE TESTED

RELIANCE ELECTRIC r3-02k5-an Throttle drosseltransformer

Reliance Electric DBU050 Dynamic Braking Unit DBU-050

Reliance Electric T100B Trigger Module - New No Box

ONE  Reliance Electric 57409-D /J-3637 /57C409

Reliance Electric Snubber Kit Cont Eq 882R

Reliance 0-51802 One Year Warranty !

Reliance 0-57170 One Year Warranty !

Reliance electric vs power module 801431005sr

RELIANCE ELECTRIC dbu050 DYNAMIC BRAKING UNIT dbu-050

Reliance Electric 0-51903-1 Power Supply Board - 

Reliance Electric DBU050 Dynamic Freinage Unité de contr?le DBU-050

Reliance electric r3-02k5-an drosseltransformer accelerator

Reliance Electric r3-02k5-an Waffle Butterfly drosseltransformer

Reliance Electric DBU050 Dynamic Frenata Unit DBU-050

Reliance Electric Snubber Kit Cont Eq 882R

Reliance AutoMax Remote Drive Interface Head     57C329    Excellent condition

Reliance 0-57403/057403/0-57403-E/057403E

Reliance Electric Snubber Kit Cont Eq 882R

Aw0016-6496 Rev c2 for dm-20 bru-200 Reliance Electric 12m Warranty id25608

RELIANCE ELECTRIC AMORTISSEUR Kit Cont EQ 882r

Reliance Electric Snubber KIT CONT EQ 882R

RELIANCE ELECTRIC 0-60023-5 AC POWER TECHNOLOGY MODULE

RELIANCE ELECTRIC HR2000/BLA-16 3RA2004 BRUSHLESS SERVO c//w CABLES(2B4)

RELIANCE ELECTRIC MD-B3005L CONTROL BOARD *NEW NO BOX*

New Reliance Electric 847492-V Circuit Board Card PCB STATIC SEALED

Reliance Electric 57443 Drive Board A-B Rio Scanner Interface 57C443 419433-3

Reliance Electric 0-57404 Network Communications Module

RELIANCE ELECTRIC 1AC2101U A-C VS DRIVE 1.7KVA 1 HP @ 0.8PF I/M D2-3064 200/230V

RELIANCE ELECTRIC MOTOR 3Y276803A12 TA, FAIRBANKS MORSE PUMP 5553F, 25GPM