57310001-CC/DSPC-CC/DSPC-CC/DSPC171

 PLC的外部设备主要是指控制系统中的输入输出设备，其中输人设备是对系统发出各种控制信号的主令电器，在编写控制程序时必须注意外部输入设备使用的是常开还是常闭触点，并以此为基础进行程序编制。否则易出现控制错误。

在PLC内部存储器中有于输入状态存储的输入继电器区，各输入设备（开关、按钮、行程开关或传感器信号）的状态经由输入接口电路存储在该区域内，每个输入继电器可存储一个输入设备状态。PLC中使用的"继电器"并非实体继电器，而是"软继电器"，可提供无数个常开、常闭触点用于编程。每个"软继电器"仅对应PLC存储单元中的一位（bit），该位状态为"1"，表示该"软继电器线圈"通电，则程序中所有该继电器的触点都动作。输入继电器作为PLC接收外部主令信号的器件，通过接线与外部输入设备相，其"线圈"状态只能由外部输入信号驱动。

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郑娟萍

厦门仲鑫航自动化设备有限公司 

 PLC的各种功能主要是通过运行控制程序来实现。编制程序时，需要合理使用PLC提供的编程元件（即软元件）。FPO型PLC中常用的编程元件有两种：位元件（bit）和字元件（word）。位元件实际上是PLC内存区域所提供的一个二进制位单元，又被称为软继电器，主要用作基本顺序指令的编程元件，如输入继电器Xn、输出继电器Yn、内部通用继电器Rn、定时（计数）器等，其参与控制的方式主要是通过对应触点的通断状态改变影响逻辑运算结果即输出。

    字元件则为PLC内存区域内的一个字单元（16bit），主要用作功能指令和高级指令的编程元件，通常用以存放数据，如数据寄存器DTn，定时(计数)器的设定值SVn、经过值EVn等。字元件没有触点，通常以整体内容参与控制。

NEW SQUARE D THERMAL HEATER ELEMENT 1-B45 B45 

NEW ROBERTSHAW CARRIER ENCLOSURE H K 0 9 U Z-0 I 2 

LOT OF 2 SIEMENS 3RV1915-3C AUXILIARY LINE SIDE FEEDER BAR 

CAROL SUPER VUTRON ET-2-P-123-70 600V POWER CABLE 80'

BURNS 158 378 158378 APPROXIMAY 9" X 1/4"  PROBE THERMOCOUPLER 1/2" NPT

Davis Instruments Inotek Temperature Probe NEW 8' Lead

COLEMAN CABLE 962624606 516' FT CAT 5E 24AWG CM 4PR UTP 3034181 CMX-OUTDOOR FT1

SICK HK SYSTEMS P05017-B PHOTOELECTRIC CONVEYOR SENSOR

NEW BOURNS POTENTIOMETER 6657N-402-105 6657N402105

NEW BUCHANAN TERMINAL SWING ARM AB31M 21 PIN 1771-WH 97611361 F

J W MILLER BELL LINE CHOKE D-7825-5 100 uH 5 A

BALDOR FLEX DRIVE II FPH1A02TB-RN23 F+DII 115V 2A FPH1A02TBRN23

NEW PHILIPS SWITCHABLE ADAPTER 9AVMAC-074I  9AVMAC074I

USED DYNAPAR HA62500600640 ENCODER 3/8" SHAFT  

MTE HYDRAULIC PUMP S202-2247 S2022247 NEW

HASTINGS VACUUM GAUGE 760 WITH DV 760 DV-4R NEW

Bradley Corp Stop Strainer and Check Valve Repair Kit S45-050 S45050 New

BONFIGLIOLI RIDUTTORI GEAR REDUCER VF44 P1 HS 

No Name Aluminum Heatsink Heat Sink Sync 9"x 6-1/4"x 1-9/16" 

2 GE ULTRAMAX BALLAST GE-132-MAX-N / ULTRA 120-277V 60H

 TRANE HDL00867 PLASTIC ACCESS DOOR HANDLE

NANA CURRENT SENSOR NNC-10GA 58A-4V NNC-10GA AMO NNC10GA

No Name Resistor Board Terminal Adapter 203709D New

SQUARE D MCC BUCKET 7.5HP 7.5 HP 15A SIZE 1 2053326-A.001 FHP36015 8736 SCO-7

ERICSSON RU22 21IV40 2100 CELLULAR RADIO UNIT MODULE KRC-118-29/2 AW118292

GE General Electric Trip/Close Control Switch 367 66455 2 16SB1BC301STS2B

NEW ARROW PNEUMATICS ELEMENT AND SEAL KIT EK9052-10 10M EK905210

EMERSON COMPUTER POWER OUTPUT FILTER KIT ASSY 79094-01-26-PL-6 71558-61-2 new

Mercoid Control Mercury Switch DA-31-3-3A DA3133A NEW

EBIT Q BLAZER V.32 HIGH SPEED MODEM TQB1

New Proportion-Air Inc. Transducer DSY065 DSY 065 

 NEW HUBBELL MALE TWIST LOCK PLUG 15 AMP A 15A 250V

NEW OPTO 22 AD10T2 ANALOG TO DIGITAL INPUT MODULE 100 OHM RTD 

NEW EATON TWIST-LITE SUCTION VALVE ENABLE SWITCH 10EA1C5F3J4 10EF3-0034

IMAJE MARKEM INK JET PRINTER DISPLAY CONTROL S8 IP 65 IP65

NEW CUTLER HAMMER PROXIMITY SENSOR E57-30LE22-B1 SER E1 10-50Vdc 22MM 200mA 

NO NAME ALUMINUM HEATSINK HEAT SINK SYNC 9"x 6-3/8"x 1-1/8" 

Ohmite Potentiometer CU-1011 CU1011 100 Ohms AB

Marel M2000 Series Control Unit Remote Control MR-1 MR1 Used

BADGER METER XMTR METER 222.96 PULSES PER GAL GALLON 6GPM PFT-420 59010-005

ABB Disconnect Switch EOT16 600 VAC 16A 16 A Amp Used

TIMONTA SUPPRESSOR FMW 2-41-1/I FMW241I

BALLUFF BES 516-418-SA7-L-03 20-250VAC 5-500mA INDUCTIVE PROXIMITY SENSOR NEW

Leviton Transient Voltage Surge Suppressor & Noise Filter 51020-WM 120/135 VAC 

SIEMENS MANUAL MOTOR CONTROL 3RV1421-1EA10 2.8-4A CLASS 10 SIRIUS 3R

TI Model 305-02DM 30502DM Data Communications NEW

FACTS PLC OUTPUT MODULE F2-08TRS 12-28Vdc 10mA 7A A AMP  F208TRS 

WEIL-MCLAIN 51128 311-103-821 51124 311-103-851 51125 311-103-818 CG BOILER NEW

NEW PARKER FLANGE KIT 5151HK-20 5151HK20 

NEW LOT OF 3 LEVITON LAMP HOLDER 3ZL09

AMPHENOL 97-3106A18-1P-417 973106A181P417 10 PIN CONNECTOR NEW

NEW MAXLITE HIGHMAX HIGH POWER CFL RETRO-FIT LIGHT BULB LAMP SKO200EAWW 200 WATT

CUTLER-HAMMER C320KGS2 AUXILIARY CONTACT BREAKER NEW

MERCOID PRESSURE TEMPERATURE SWITCH DA-35-2-6 DA3526

SUPCO Condensate Pump w. Audible Alarm CP1A CP-20SB 20 GPH 115V 1PH 1.5A New

Swagelok Plastic Front Ferrule NY-1613-1 NY16131 Lot of 10 New

NEW LOT OF 94 3M SCOTCHLOK ELECTRICAL SPRING CONNECTOR Y 

NEW PARKER SEAL KIT PKH-PK152HLL05 PKHPK152HLL05 

Mitutoyo Digital Readout SD-D1E SDD1E DC 9V-500mA

Eddy Current Clutch ECC Follower Kit 615163 1235-01

SQUARE D DICONNECT 30A SIZE 1 STARTER COMBO 8538-SCG11

PERKIN-ELMER INSTRUMENT SER. 0507 0-90 

JOD Uniphase SFP Optical Transceiver 200/100-M5/M6-SN-I 52P6537 Lot of 2 Used

MULLER ELECTRONIC MODULE (0511) 46 40 41

Surge Control LTD SPP-1204 Surge Suppressor SPP1204 New

NAMCO Pulling Solenoid EB550-00004 110/120v NEW 

Clark 992376 Solenoid Valve 992-376 New

PRX ME500806 F 9734 MODULE BLOCK ME500806F9734

LOT OF 2 OGDEN LIMIT CONTROL TEMPERATURE CONTROLLER ETR-9040-4110 ETR-9040-411B

CM Yale Brake Lever Kit 51543120

Schrader Bellows Hydro-Check Cylinder MODEL UNKNOWN Rebuilt 

NAMCO CYLINDICATOR PROXIMITY SENSOR 3000 PSI

ELECTRONICS ICS INSTRUMENT COUPLER 4880 4881 REV. 24

AIRMAT AIR MAT 13FT 13' HOSE 1/2" I.D. 3/4" O.D. NEW

SSD DRIVES CONVERTER  5702-5  57025  

SPECTROL Potentiometer 534-21202 53421202 NEW  

GLASSHEAT GLASS HEAT RADIANT HEATING PANEL 1445 DTC 1445DTC 1500W 1500 W 240V

NEW CRYDOM / SCHNEIDER RECTIFIER ALUMINUM HEAT SINK SSHE-90 SSHE90 3-1/2H 4W 6L

New Naherungsschalter Proximity Switch 0920 220/7 

Hubbell Deluxe Cord Grip 07401080 1/2" NPT .500"-.625" DIA Range New

SQUARE D POWER PACT JL 250 MOLDED CASE SWITCH JLN36000S25ABSO 250A 250 AMP A 3P

NEW NO NAME STRAIN RELIEF CORD 36567 .53-.73 

NEW RETRACTIAL CABLE 25-38697-02 A

MITSUBISHI POWER MODULE CM400HA-24H CM400HA24H - USED

NEW NUPRO POPPET PRESSURE CHECK VALVE SS-4CPA4-50 1/4"NPT S/S STAINLESS STEEL

RITE HITE WL-200 WHEEL-LOK RESTRAINT CONTROL BOX

3) New GE Standard Projector Bulb 43703 2000h 6200lm

HEIDENHAIN LOT OF PCB ENCODER EQUIPMENT NEW

Miller MMP Pulse GMAW Control 042727 24 VDC 0.5 A Amp 1 PH Used

EATON PRL1A 225A 225 A AMP 208Y/120V3PH 4W BREAKER PANELBOARD

Boston Gear DC-90V DC90V

SOFTRON ELECTRICAL SOUTH DRIVE ELECTRONIC DRIVE SOFT-START CONTROL

TAPESWITCH ZC-2 ZC2 ZONE CONTROLLER 

YASKAWA PC BOARD JANCD-MSV01B DF9201893-A0N REV.F01 MSV01B w/ JANCD-MSV02 REV.D

Lot of 3 BEN-DEC DA2 DA-2

NEW SCOTCH 054007-10885 #35 BROWN ELECT TAPE 3/4"x 66'

4 Helwig Carbon Motor Brush 2" 1-1/2" 5/8" 13-621523

NEW REXROTH MANIFOLD SEGMENT R432013811

NEW PYREX GLASS LAB BEAKER FLASK NO. 1000 250ML 50-200 ML 150-0 ML

SQUARE D MCC BUCKET ND-403 ND403 SIZE SZ 2 120V a 60HZ 

Aero-Motive Slip Ring Kit V400107000 New

GoodYear Super Torque Timing Belt  250S8M976 S8M976 New

Gould Message Cartridge J524-104 J524104 Used

NEW FESTO CYLINDER EG-12-25 EG1225 8 BAR

RAYTHERM B1045-25 B104525 - USED

NO NAME ALUMINUM HEAT SINK 20-1/4"x 11-3/4"x 2-7/8" 

NEW NO NAME ALUMINUM HEAT SINK 3"x 3-1/64"x 1-11/32" 

NEW CURTIS 2311294 DISCHARGE INDICATOR 

NEW DOCKWIELER DW-CAP KLAM-1.4301 P40817 

AUTOMATION DIRECT AUXILIARY CONTACT GH15T22 GH-15T22

EIS ENGINEERED INSPECTION SYSTEMS MODEL# XCV 19 L XCV19L

BARBER-COLMAN 425 824.01 415V 25A

MARLEY ELECTRIC DS60 INTERNAL THERMOSTAT NEW

Cutler Hammer Breaker NE-8763 NE8763 10A 10 Amp A

Pepi Temperature Sensor CR 040+130F

GOULD SHAWMUT 60308R 600V 30A 30 A AMP FUSE HOLDER NEW

LINKSYS ETHERNET SWITCH ETHERFAST 100BASE TX 100 BASE TX 8-PORT HUB EXHUB08

Weiss Temperature Gauge w Probe 0-110*c 20-240*f

COSENSE TRANSMITTER CONTROLLER LL-1101-1121S20 LL-1101

BALDOR 27 1281 11881 1.3HP 1.3 HP 24V 2600 RPM DC ELECTRIC DRIVE MOTOR REBUILT

Wilkerson L28-03-LL00 Lubricator L2803LL00 250 PSI New

Idec ABN301-R Push Button ABN 301-R ABN301R New

NO NAME LARGE ELECTRICAL ENCLOSURE CABINET W/ ADJUSTABLE BACK PLATES 142x24x82

NEW ROBERTSHAW VIBRASWITCH VIBRATION SWITCH 366-A8 366A8 120VAC RESET 

Hubbell Grounding Ball Stud Assembly CS600-2102 CS6002102 CS600 2102 New

NEW SCHUNK 301594 PROXIMITY SWITCH CABLE 

NEW HUBBELL MALE TWIST LOCK PLUG 20 AMP A 20A 480V 

Leistenwaechter Rechts 50259099/004 84085151 140608

ROSEMOUNT PRESSURE TRANSMITTER 1144 A0200A22 200 PSI

No Name 40B16 Sprocket 40B16 New

NEW LOT OF 2 Flexiduct Cord Cover for Window & Geist CC-4 6' FT

Deckel Dialog Controller 11 9.44216-1201 6006 04 006000

Belkin ExpandView Expand View F1D068 12vdc

TRU-Flate 18-202 Blowgun 18202 30PSI Max 1/4" Npt New

NEWPORT ELECTRONICS SERIAL PRINTER PR2201

TURCK RKM 36-2M RKM362M RKM 36 2M U5001 NEW

(21) Renold Limited OFFSET LINK # 35-2 352 New

PERKIN-ELMER .028 .025 MM

DWYER 3205 PHOTOHELIC 25 PSIG PRESSURE SWITCH /GAGE 

Allen Bradley Coil 85A83 220/240 V Volt New

SENSONICS LTD IS 056 9251 TRANSDUCER 12 VDC 

NEW HARTING CONNECTOR 09 06 015 287 1 0906 0152871 15-PORT

Balluff 0527DE 122288 Inductive Proximity Switch 

NEW SQUARE D 9007 CT-52  BASE RECEPTACLE 9007CT52

Balluff 0527DE 122288 Inductive Proximity Switch 

NEW SQUARE D 9007 CT-52  BASE RECEPTACLE 9007CT52

NEW LOT OF 10 LEGRIS PUSH CONNECT STRAIGHT TUBE UNION 3106-60-00 3/8"OD 31066000

EMECANIQUE DE9.RA 1012 DE9.RA1012 1/2" NPT ADAPTER NEW 

Security Door Controls EMLock 1500 Series Aluminum Electromagnetic Lock 1571 New

Lot of 3 K and B K&B NEW 692915 4204

New Foxboro Pen Lift Assembly M0100A6 Lot of 2

McMaster-Carr GP1463KGL6 6" Thermocouple Probe GP-1463-KGL-6 Type K New

NOS POWER SONIC PS-6360NB 6V 6 V VOLT SEALED RECHARGEABLE BATTERY 36AH AMP HOUR

No Name Thermocouple 18' 1385.2901 New

MERCOID 3-9107SC 3-91 MERCURY SWITCHES NEW

3M Case Sealer Belt 55" X 1 3/4" X 1/4" New

Allen Bradley Overload Relay Thermal Unit N74 Lot of 2 New

GE General Electric Light Tower SLB1ADMO SLB1ADM0

Allen Bradley End Plate 1492 1492-N16 1492N16 Style CA Series A Lot of 12 New

NEW PEPPERL & FUCHS SENSOR RELAY MPSD11HD 454465 92-132 VAC 60 HZ

Car Quest JP-6 Point Set JP6 New

NEW GE GENERAL ELECTRIC AUXILIARY SWITCH 284B103 G1 284B103G1 TYPE SB-1 SB1

AMERICAN STANDARD BAYSPEK047A SINGLE POWER ENTRY KIT 

Rosemount E96 Part 2001864 E 2001 864

DRI STEEM DRISTEEM SCR POWER CONTROLLER 70A 70 AMP A 3224-70A 322470A

HOWA DISPLAY METER HDS-2 HDS2 M122918 

CINCH 20 POSITION TERMINAL BLOCK NEW 

Mitsubishi Lithium Battery GT15-BAT GT15BAT New

MARS OVAL MOTOR RUN CAPACITOR 45 UF MFD 440V 12048 NEW

Rexnord Gear RS 1030 RS1030 New

Durant Eaton Simultaneous Processor 49990-408 49990408 15 VDC New

MITSUBISHI MELSEC OUTPUT MODULE BOARD AY41 AY-41

AGV ZAHN Chopper Servo Amplifier CH10090F/120 

Electro Corp Model 727287 Used

NORDSON GUN TRIGGER HARNESS 1025746A 1025746 REV A02

GOULD SHAWMUT SEMICONDUCTOR FUSE A50P125-4 125A 125 A AMP 450V DC 500V AC 

NEW LOT OF 2 NO NAME VACUUM SUCTION CUP WITH CLEATS F-30 F30 MALE 1/8" NPT 30 MM

Allen Bradley AB 173257 NEW

Thomas & Betts Male Screw Terminal Insert B10 Series MS210B 16 A Amp 600V New

MIKAB A/D Thermocouple Card 20801-0 

sor Module 800-0014-00 800001400 Used

Intec Length Disc 7010047 Rev E Used

Spraying Systems Nozzle H1/8VV 4001 H1/8VV4001 NEW

SIRRIS TI-142 TI 142 TI142

NEW FLEXCO ALLIGATOR BELT LACING SET 27-18 10167 17/32" X 9/32" 

CARRIER SUBBASE/THERMOSTAT HH93AZ176 HH 93AZ 176 NEW

Stober TD27 B Traction Ring 3273 New 

NEW EATON CUTLER HAMMER BREAKER ENCLOSURE FLUSH SURFACE COVER CH8BF

NEW GIBRALTAR BLACK BALL KNOB BRASS INSERT 1-3/8" DIA 3/8-16 THREAD 

Ametek Power Instruments Tachometer C-891 C891 C 891

DEC DIGITAL 1GB HDD HARD DRIVE RZ26-VA RZ26VA

Reliance Electric Surge Suppressor 600686-25RR 240 VDC 5 Amp New