为什么工控界更信任PLC，选择PLC作为工控的核心部件呢，主要是由于PLC的以下五个特点：

1. 可靠性高，抗干扰能力强

无触点控制：故障率少；

硬件措施：屏蔽、滤波、隔离；

软件措施：故障检测、信息保护和恢复、警戒时 钟（死循环报警）、程序检验

2. 使用灵活，通用性强

产品系列化，硬件结构模块式，可灵活选用；

软接线逻辑使得PLC能简单轻松的实现各种不同的控制任务，且系统设计周期短。

3. 编程方便，易于掌握

     采用与继电器电路极为相似的梯形图语言，直观易懂， SFC 功能图，使编程更简单方便。

4. 接口简单，维护方便

    可直接与现场强电设备相连接，接口电路模块化。

有完善的自诊断及监视功能，便于查出故障原因，并迅速处理。

5. 功能完善，性价比高

     除逻辑控制，定时计数，数字运算外，配合特殊功能模块还可以实现点位控制， PID 运算，过程控制，数字控制等功能，还可与上位机通信，远程控制等

DYNAPAR ENCODER & RESOLVER 62-AAEF-0128-A0

DYNAPAR ENCODER & RESOLVER 62-AAEF-0128-A0 *FACTORY SEALED*

DYNAPAR A5810240D1M

DYNAPAR 63-AAEF-0010-A0 ENCODER *FACTORY SEALED*

DYNAPAR 62-PMLF-0240-AA M060079

DYNAPAR 62-PMEF-0100-A0-00

DYNAPAR 62-PMDF-0050-TB

DYNAPAR 62-AADF-1000-A0 *FACTORY SEALED*

DYNAMIC DISPLAYS QES1508-008

DYNAMIC 75-322-6 FIRING BOARD 15-322-2

DYNAMATIC NEGATIVE BASE DRIVER 15-591-8

DYNAMATIC 70-47-110 *NICE*

DYNAMATIC 15-591-8 NEGATIVE BASE DRIVER BOARD

DYNAMATIC 15-591-7 POSITIVE BASE DRIVER BOARD

DYNAMATIC 15-576-4 POWER BOARD

DYNAMATIC 15-576-4 P.W.M. POWER BOARD

DYNAMATIC 15-575-2 LOGIC BOARD

DYNAMATIC 15-235-5 CONTROL BOARD ASSEMBLY

DYNAMATIC 15-000259-4161 SPEED DRIVE

DYNACORP CLUTCH-BRAKE CONTROL 214257-040-2230

DYNAC DAV0055NKL1N1P1 FREQUENCY CONVERTER

DYNAC D2V030NF1006 FREQUENCY CONVERTER

DYNAC D2V018NF1006 FREQUENCY CONVERTER

DYNAC D2V007NF1006 FREQUENCY CONVERTER

DYNAC CIMR-G3A4015 TRANSISTOR INVERTER

DYNA HOIST DAV0185NKL1N1N1 -INVERTER

DYNA FIVE 100378 REV D

DURCO PUMP SHAFT 1Z105-BBC3

DURANT E45481010

DURANT 5-Y-41433-406-PDQ PREDETERMINED COUNTER

DURANT 58861-400 COUNT TOTALIZER 6 DIGIT

DURANT 588514000 DIGITAL TOTALIZER

DURANT 38151-600 ENCODER

DUNKERMOTOREN RG62X60

DUNKERMOTOREN PLG 80 w/ DR62.0X80-2/ASTO

DUMORE CORP. TOOL POST GRINDER 14-011

DUFF-NORTON SPA6415-6 ACTUATOR

DUFF-NORTON PSPA6415-12 MECHANICAL ACTUATOR 12" w/ YY 94/76-2A

DUFF-NORTON KGAOD00004X WORN GEAR ACCUATOR

DT9834-16-4-16-OEM

DRUCK RTX1000H-18-G-2-N-0-F-LHB PRESSURE TRANSMITTER 0-3000 PSI

DRIVERCON VF64S-5R544 AC DRIVE

DRIVECON XTD4022-1004 DRIVE

DRIVECON VF64S1144

DRESSER SIZE 3 TYPE GA PUMP G08771

DRESSER INSERT DISK 6028801 HT: 254280

DRESSER INSERT DISK 6028801 HT: 239993

DRESSER INSERT DISK 6028801 HT: 185205

DRESSER E2JF-14

DRESSER CONSOLIDATED 1511J-0-2-X LP3 SAFETY RELIEF VALVE

DRESSER A2RF-14L

DRESSER 6279801 THERMOFLEX DISC

DRESSER 6279801 DISK FOR VALVE

DRC SST-10-M4-96C-S558 ENCODER

DRANETZ PP1/P 8-CHANNELMONITORING SYSTEM

DRAGER SAFETY INC. 4500015 SENSOR

DRAGER 8317610 P3U(POLYTRON 7000)

DR. SCHLEUNIGER TM-200 PHARMATRON

DPC 9815P-00DT-A22 OPERATED INTERFACE

DOVER TR2/6

DOVER TR2/10

DOVER B120THX30/1P-SC-S

DOSATRON DSA 15 PUMP

DOSATRON DI 16-11GPM PROPORTIONAL DOSING PUMP

DORNER MOTOR/REDUCER 32M005HL423EN (AS PICTURED)

DORNER 62M009PY423EN ORIENTAL MOTOR w/72MN1124S INVERTER

DOOR-MAN ICS05149 TRAFFIC CAUTION SYSTEM

DOMNICK HUNTER DAS1 COMPRESSED AIR DRIER

DOMINO 14828

DOLCH COMPUTER SYSTEMS INC. PM-10-VG-R10

DOLAN-JENNER SS550-10000 RELAY

DOLAN-JENNER SS5500-20004 SAFESCANEZ PERIMETER GUARD SYSTEM

DOLAN-JENNER SS5500-10006 SAFESCANEZ SYSTEM

DOLAN-JENNER SS5500-10004 SAFESCANEZ SYSTEM

DOLAN-JENNER SS500-10110 TRANSMITTER

DOLAN-JENNER SS1000-40000 RECEIVER CONTROL UNIT

DOLAN JENNER SS7-28B SAFESCAN CURTAIN TRANSMITTER (MISSING KEY)

DOERR LR22132 MOTOR 1/6 HP 1725/1425 RPM w/ CKG (AS PICTURED)

DODGE TIGEAR 2 35Q50R56 GEAR REDUCER 2.86 HP 1750 RPM

DODGE TIGEAR 2 35Q05R18 GEAR REDUCER 15.43 HP 1750 RPM

DODGE TIGEAR 2 35Q05L21 GEAR REDUCER 15.18 HP 1750 RPM

DODGE TIGEAR 2 35A50L14 GEAR REDUCER 2.64 HP 1750 RPM

DODGE TIGEAR 2 35A30R14 GEAR REDUCER 4.15 HP 1750 RPM

DODGE TIGEAR 2 35A20R14 GEAR REDUCER 5.79 HP 1750 RPM

DODGE TIGEAR 2 35A15R14 GEAR REDUCER 7.44 HP 1750 RPM

DODGE TIGEAR 2 26QZ25L56 GEAR REDUCER

DODGE TIGEAR 2 26Q40L14 GEAR REDUCER 1.55 HP 1750 RPM

DODGE TIGEAR 2 23QS50HA56 GEAR REDUCER 0.95 HP 1750 RPM

DODGE SCXT225 SCREW CONVEYOR REDUCER

DODGE P198015A002CB079167-24-CM

DODGE MASTER M85013ZGP GEAR REDUCER 7 HP 1750 RPM

DODGE MASTER 7848856001MP GEAR REDUCER 8.10 HP 1750 RPM