1756-CNB 1756-CNB1756-CNB 1756-CNB

当PLC的用户程序要保留在RAM中时，就会用到电池，电池通常是3V或3.6V的不可充电的锂电池，电池的使用寿命通常是五年左右，电池用久了，电压就会下降，当其下降到不足以保证RAM中数据时，RAM中的程序就会丢失。如果用户没有备份程序，就会相当麻烦。[1] 

一般PLC内部设有电池电压检测电路，当电压下降到一定程度时，PLC就会报警，提醒更换电池。PLC的使用说明书都有提供更换电池的方法。一般来 说，PLC在断电后，因为PLC上RAM电源端接有充电电容，即使把电池去掉，电容上充电电量也足够RAM内的数据保持一段时间，所以如果取掉电池后在短 时间内（通常5分钟）再将新电池换上去，数据是不会丢失的。

但用户实际使用PLC的环境情况不尽相同，例如电容的容量下降，RAM电源回路有 灰尘、油泥等形成放电回路等，这会加快PLC断电后电容的放电速度，从而使时间不好把握。如果在带电的情况下更换电池就可保程序*。因为电源始终会 有电压加在RAM芯片的电源脚。当然更换时亦要小心应对，注意电池的极性以及避免短路情况发生。

是把PLC通电15分钟（给内部电容充电），断电，在5分钟内换好新的电池，再上电试一下。

西门子PLC有带卡的，有不带电池的；也有带卡的，带电池的。程序存在MMC卡中，如果没有存储卡，需要电池保存程序的，更换电池时候务必注意，带电的情况下，将旧电池取出来，然后将新电池换上即可。

ASML 4022.439.60851 ENDPIECE WELD FLG SST 250×2×55 , NEW

AMAT 0140-01881 CABLE, SENSOR-CONTROL, BLKHD 4, SCRUBBER, WORKING

AMAT 0010-29858 AC DISTRIBUTION ASSEMBLY, RF BASE HEATER, CHAMBER A PROD S , NEW

AMAT 0050-94160 MAINFRAME ,  NEW

AMAT 0140-11359 CABLE MEG TANK LVL/DOOR CL SW LO ELECT M, WORKING

NOVELLUS 15-101482-01  FORK, TOP PLATE, B ANTI-DEFLECT, SEQ, NEW

AMAT 0190-77016 ENCODER SERVMOTOR PC1-3 , USED

AMAT 0150-25432 D LINK PORT 10, NEW

AMAT 0150-11506 FGI/11/1G, NEW

BROOKS TT1ENR2-1-TVS-ES-BROOKS8 Robot Teach Pendant Handheld Controller

AMAT 0140-06296 CABLE SENSOR-CONTROL BLKHD 3 SRD (SMOOTH SHIELD CNTRL), WORKING

AMAT 0090-77153 BRUSH BAR SWITCH RIGHT SENSOR, NEW

AMAT 0021-21890 RING, DEPOSITION, 8 JMF, TI/TIN, HTESC , NEW

Hoffman TFP61UL12 Cooling Fan 115V .36A , USED

NOVELL 38-134677-00, 38-134670-00 CABLE SENSING WATER LEAK 50FT, ADPTR MODU, NEW

CKD  FILTER  W3100/R3100/V3100  FILTER REGULATOR,USED

AMAT 3700-00629 SEAL ASSY PERLAST WITH SST NW50 CTR RING, NEW

AMAT 0140-01844 CABLE OM SENSOR-CNTRL BLKHD 3 SYSTEM, WORKING

AMAT 0010-13071 ASSY, PVD SLIT VALVE DOOR & MOUNT, 300MM , NEW

AMAT 0150-11507 REV 004, NEW

AMAT 0140-01947 CABLE BRUSH POS MOTORS POWER SCRUBBER 2, WORKING

HUBBELL HBL2321 NEMA L6 - 20P TWIST LOCK PLUG 20A 250V

AMAT 0270-00860 CATHODE STAND,NEW

AMAT 0100-01646 PCB ASSY, UPA DISTRIBUTION BD., 200MM 5- , USED

AMAT 0040-51159 PLUG, ANODIZED SGD, 300MM EMAX , NEW

AMAT 0140-04902 HARNESS PAD 3, POLISHER BKHD COND & SWP, WORKING

NOVELLUS 16-033931-00 SHOWER HD PINNED 200,WLDMNT , NEW

TOKYO Q310-231493 BLOCK ASSY,UV MONITOR, NEW

AMAT 0140-02811 HARNESS START/STOP BLKHD, WORKING

AMAT 0015-77236 DISC NOZZLE , NEW

AMAT 0040-85379 RF CONDUCTOR OFFSET , NEW

AMAT 0050-92389 GASLINE, AR FAC TO PURGE MODULE, 300MM ALD TAN (RPG), NEW

HUBBELL HBL2326 CONNECTOR, POWER ENTRY, RECEPTACLE, 20A

AMAT 0021-39076 MANIFOLD, OUTPUT H2O, TI-XZ , NEW

AMAT 3300-02518 MALE NPTF PIPE, NEW

AMAT 0200-35841 PUMPING RING, CERAMIC, GIGA-FILL SACVD , NEW

AMAT 0680-01190 CBTHERM SGL POLE 5A PB 50VDC 250VAC 50/6., NEW

AMAT 0190-25400 VALVE GATE 200 THROTTLING (STANDARD) TPV , NEW

AMAT 0090-00028 FULL ATMOSPHERE SWITCH ASSY, 8100 , NEW

AMAT 0090-09022 FULL ATMOSPHERE SWITCH ASSEMBLY , NEW

NOVELLUS 16-271392-00 300mm 13" Shower Head , NEW

AMAT 0270-00689 INSTALL, TOOL COLLAR, 300MM HDPCVD,NEW

AMAT 0020-38074 INSULATOR, HV-FEED, NEW

AMAT 0190-25401 VALVE GATE 200 THROTTLING (MIRRORED) TPV  , NEW

ITAC SYSTEMS GPNB-5XXMP B-MPIND MOUSE TRACK BALL

AMAT 1040-00183 METER FLOW WATER , NEW

AMAT 0140-12771 55BLE FLOW/PRESSURE SW LOWER ELECT MEG, WORKING

THERMO SCIENTIFIC D4511 Barnstead B-Pure Water Filter, NEW

AMAT 0090-A4700 XDC PSU , NEW

CKD MN3E0660-**-FL313891 N4E0-QX-FL319147, N4E0-EL, USED

AMAT 0150-16851 CABLE ASSY 25 FT EVC M/M, WORKING

CKD MN3E0660-**-FL313657 N4E0-QX-C-FL319145, USED

FUTURESTAR 154-010 PATHFINDER SERIES TEFLON FLOW METER

AMAT 0140-11665 CABLE MEGASONIC SENSORS, UPPER ELECT, WORKING

CKD N4E0-T30R, USED

AMAT 0090-A2690 BOOSTER PS ASSY , NEW

FUTURESTAR 154-040 PATHFINDER SERIES TEFLON FLOW METER

AMAT 0090-A3220 SBBI ASSYSEM-I BEAM BLANK , NEW

AMAT 0270-00739 INSTALL TOOL CATHODE ASSEMBLY, 300MM HDP, NEW

SMC 10-CQSB25-35D CYL, COMPACT 1.0MPa, USED

AMAT 0090-A4670 CAMERAS PSU , NEW

AMAT 3620-00055 PUMP DRAIN FOR QLCA-320 , NEW

AMAT 0190-14995 SPECIFICATION GRIPPER. CRYO PUMP 300 MM, NEW

AMAT 0140-78563 CABLE MOTION CONTROL SENSORS SYSTEM, WORKING

AMAT 0140-78037 CABLE, UPPER-LOWER SYSTEM, WORKING

FUTURESTAR 154-00250 PATHFINDER SERIES TEFLON FLOW METER

EBARA FREX 200 CARRIER HEAD ( STI CMP ), WORKING

EBARA FREX 200 CARRIER HEAD ( WCMP ), WORKING

HMI 77-604-210120-004-3 DEFLECTION IMAGE CONTROLLER NEW TYPE DICC-E , USED

HMI 77-603-080500-000-0 SCCECC-A CONTROLLER , USED

emecanique LC1F225 CONTACTOR, WORKING

AMAT 0020-24558 HONEYCOMB COLLIMATOR 3/4 HX 1.5:1 8" , NEW

RORZE PURR-4561-1 PULLED FROM ULVAC ENTRON , USED

AMAT 0010-14714 ASSY, 4 PORT TP UPA REFLEXION, WORKING

SMC ITV2050-402S-X80 Electropneumatic Air Pressure Regulator, USED

RORZE RAE-01786 PULLED FROM ULVAC ENTRON , USED

AMAT  3870-04672 THROTTLE BUTTERFLY  VALVE  IQD, USED

EBARA MEIS-2000 MULTI PROCESS MONITOR FROM FREX300S , USED

BROOKS AUTOMATION 002-9479-04 REV : 1, NEW

LAM 720-000920-004 SCR, SCH CAP,4-40,  NEW

LAM 721-000956-002 WSHR, LK, #10,  NEW

LAM 721-000964-001 WSHR, FLT, 1/4,  NEW

EBARA EMA-16 RECM-1 MAIN AMP FROM FREX300S , USED

AMAT 1350-00400 NT Pressure Transducer 4210-060G-F04-B12-B-P1-U1 , NEW

Shimadzu 262-78782-22 Turbo Molecular Pump Cable EI-D3403M , NEW

AMAT 0150-05891 CABLE ASSY, DVRS ENCODER, CNTRL-MNFRM BK,USED

PATLITE LCE-AFB SIGNAL TOWER

AMAT 0010-39207 HIGH EFFICIENCY RF MATCH, ETCH, SUPER-E, USED

AMAT 0150-77040 CABLE ASSY, HD ROT CNTRL,USED

AMAT 0010-70264 5-PHASE STEPPING MOTOR, 1 SET, USED

PATLITE WM-FBEN Light Tower 4 Lights 24V AC/DC 10W

AMAT 0870-01072 DRVR SERVO AMP 200V 15A DNET PV1A015SM61P50 , NEW

AMAT 0150-77047 CBL ASSY,PWR PLATEN CNTRL,USED

AMAT 0010-35048 5-PHASE STEPPING MOTOR, 1 SET, USED

AMAT 0020-79227 SENSOR PLATE, USED

AMAT 0010-01711 5-PHASE STEPPING MOTOR, 1 SET, USED

AMAT 0010-70149 5-PHASE STEPPING MOTOR, 1 SET, USED

WHITEY SS-44XS6 3- WAY BALL VALVES

AMAT 0020-77944 BASE PLATE MOUNT , NEW

AMAT 0150-77056 Platen Motor,USED

AMAT 0010-09978 ASSY LAMP MODULE AU-PLATED 200MM, USED

NAGANO KEIKI KL12 differential pressure transmitter 27VDC 0.5kPa 20mA DC, USED

Norgren VM1516SL12898A DeviceNET 5V MOD NET, WORKING

MITSUBISHI QD51 INLIGENT UNIT, MELSEC-Q, USED

AMAT 0010-25625 ASSY,ENDURA 300MM PR CH SLIT VALVE REV 3 , NEW

AMAT 0150-77058 CABLE ASSY,DIGITAL I/OBP,USED

ACCRETECH RE07118-G001-02 AF CONTROL UNIT , USED

RDI 2M26FC TERMINAL BLOCK INTERFACE MODULE 

AMAT 0190-14751 SPEC., CDA MANAGEMENT KIT, YASKAWA ROBOT , NEW

AMAT 0010-04926 HV MODULE ASSY, NEGATIVE, CESC , USED

ONTRACK 28-8875-002 PCB, OPTO OUTPUT BOARD

AMAT 0150-77053 CNTRL BKHD ROBOT,MNFRM BKHD HEAD SWEEP,USED

Lam Research 715-022497-008 COV,LWR,ELCTRD HSNG, 2300 BSR, NEW

AMAT 0100-00062 STEPPER DRIVE , USED

GESAPC GESICU-2A INDUSTRIAL INTERCONNECTION UNIT

AMAT 0190-11724 SWITCH, WATER 3/4" HOSE/W ANALOG OUT 6 G , NEW

AMAT 0190-17687 SW PRESS SPDT 1A RES 28VDC FIXED 600TORR , NEW

AMAT 3870-01574 VALVE PNEU BLWS 3WAY NC- N/0 1/4 BUTTWEL 6LVV-P1V333P-AB

CAMBRIDGE FILTER GA5-457915FU-STL80 HEPA FILTER,KONDOH CKA572-A001 Air Fan,USED

Malema LFC-7302-21321-212-001 Liquid Flow Controller , USED

AMAT 0040-89837 GIMBAL BASE (UNIVERSAL) PAD CONDITIONER 200MM , NEW

AMAT 0020-78260 MNTG BRKT 1 LOADCUP, NEW

AMAT 0100-76061 ASSY, PCB SYSTEM ELECTRONICS BACKPLANE , USED

SMC VXA2232J AIR OPERATED VALVE, WORKING

SMC ZL112-DBH00005 MULTISTAGE EJECTOR, WORKING

ACCRETECH RE07125-F001-00 I/O ITF BOX , USED

IODATA CDRW-U5232 CD Rom Drive Compact Disk 52x32x52

ACCRETECH RE07124-G001-01 DC/M1 , USED

TOKYO ELECTRON 1181-000434-15 MC-31108A OMRON B7A-T6D7, USED

OMRON K3GN-NDC-FLK DC24V DIGITAL PANEL METER, USED

AMAT 0020-27207 CLAMP RING 6 SMF PADDED HTHU HTR, NEW

AMAT 0150-77061 CABLE ASSY,DRVS ENCODER,USED

SHI CONTROL SYSTEMS UMC5B0001-01 LINEAR AMPLIFIER MODULE SDLV-004A UMC5B0

Advanced Energy AM/DEMO 250-1200 Sekidenko 2000 1-Ch Optical Fiber Thermometer

SHI CONTROL SYSTEMS SDLN-014BMT LINEAR AMPLIFIER MODULE , USED

YAMAMOTO ELECTRIC MS61AHV1.2E-K DIFFERENTIAL PRESSURE SWITCH 0.2~1.2kPa, USED

YAMAMOTO ELECTRIC MS61AHV1.2E DIFFERENTIAL PRESSURE SWITCH 0.2~1.2kPa, USED

AMAT 0190-10735 ASSY,LOWER ELECTRONIC BOX,BRUSH 2,2 CHEM, WORKING

YAMAMOTO ELECTRIC MS61L DIFFERENTIAL PRESSURE SWITCH 0.5~3kPa, USED

SHI CONTROL SYSTEMS UMC5B2003-10 POWER SUPPLY MODULE PSDC-10A1 UMC5B2003AAG10

AMAT 0010-14246 ASSY, 100-500CC SINGLE CHANNEL, SLURRY D, NEW

AMAT 0021-77895 STUD, NEW

AMAT 0190-77374 MANIFOLD, 8-VALVE, CHEMICAL SUPPLY, MEGA , USED

Nemic-Lambda NNS30-15 15VDC @ 1.4-3.4A Power Supply , USED