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
