1756-DHRIO 1756-DHRIO1756-DHRIO 1756-DHRIO

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。

VESDA VLC-505 LaserCOMPACT Detector, USED

YASKAWA XU-RCM5020 ROBOT FOR NIKON NSR-S307E , USED

Channel Well Technology PSG350P-80 AC I/P 100-240Vac 6.3 A 50/60HZ , USED

AMAT 0140-78295 CABLE, PWR, PLATEN 3, LOT BOX-MIRRA BLKH, WORKING

AMAT 0050-91046 FORELINE, UPPER, CURVED, SACVD, PRODUCER , NEW

BLACK BOX SW980A  2 TO 1 LOCAL/REMOTE SWITCH, USED

AMAT 0021-14954 DRIVE END, QUICK CHANGE BRUSH MODULE , USED

AMAT 0140-78294 CABLE, PWR, PLATEN 2, LOTO BOX-MIRRA BLK, WORKING

AMAT 0021-13799 SPACER, OUTPUT JAW, BRUSH MOUNT, DRIVE , USED

AMAT 0021-13797 SPACER, INPUT JAW, BRUSH MOUNT, DRIVE , USED

AMAT 0021-24220 RETAINER, BEARING HOUSING, BRUSH MOUNT A , USED

Netgear FS516 16-port 10/100 Ethernet Switch, USED

AMAT 0010-19288 Q.C. 4.3 SHAFT ASSEMBLY DRIVE SIDE, BRUS , USED

Philmore ST-100 100 watts 110 to 220 VAC Step Up and Step Down Transfo, USED

AMAT 0190-14368 YASKAWA ELECTRIC AMERICA SMC 2000-8DM, WORKING

AMAT 0040-76957 SPLASH GUARD DRIVE SIDE BRUSH MODULE 200 , USED

FUJIKIN INCORPORATED O.P. 0.34-0.69 Mpa  N.C VALVE, USED

FESTO CONTROL SYSTEMS 0010-30955 FACILITY INTERFACE, PS, WORKING

AMAT 0140-03507 HARNESS AC POWER FABS 50FT,USED

FUSION semiconductor 343282 L/R DUAL SERIAL INTERFACE CARD, NEW

AMAT 0040-80379 SPLASH GUARD FLOW THRU SIDE BRUSH MODULE , USED

FUSION semiconductor 386643 PWB ASSY-DUAL, HV-SMPS, GES, NEW

LAM 853-801876-004 ASSY, ADIO, GTWY, PMP/TCU  , NEW

AMAT 0100-20004 wPCB ASSY, CHAMBER INTERCONNECT, NEW

AMAT 0190-27818 1007-0062 Specification, MEI XMP-Sercos-PCI Motion, NEW

FUJIKIN INCORPORATED O.P. 0.39-0.59 Mpa  N.C VALVE, USED

AMAT 0021-23336 ROD SPLASH GUARD HOUSING SCRUBBER , USED

I VS-412B Video Switcher ,USED

APS MCF-XSSXSS-1587 POWER SUPPLY OUTPUT 750W MAX , USED

AMAT 0021-79177 PLATE, X ADJUST , USED

AMAT 0150-77259 CBL ASSY PAD CONDITIONER 2 MTR UMBIL. 75,USED

MOXA OPT 8B Series 8-port Anschluss-Boxes RS232 + Anschlusskabel , USED

Fusion 282702 200ACU Process Chamber Assembly, USED

AMAT 0021-79841 SHIELD MOUNT , USED

AMAT 0021-79845 BRACKET, MOTOR , USED

AMAT 0021-79178 PLATE, FRAME , USED

AMAT 0150-77253 CNTRL BKHD HD ROT 4 P16,USED

AMAT 0021-77484 MOTOR MOUNT , USED

AMAT 0140-03110 DI/O-5 MAINFRAME SIGNALS, MIRRA CMP, NEW

AMAT 0090-09145 ASSY, SUSCEPTOR TC & OVERTEMP INTERLOCK , USED

AMAT 0150-77208 P19AR CONTROLLER AOAPTOR,USED

CCS PLV-2410-1 REMOTE CONTROL , USED

AMAT 0021-77922 HOUSING, GIMBAL BASE, NEW

AMAT 0140-78297 CABLE, PWR, PAD COND 2, LOT BOX MIIRA-BL, WORKING

AMAT 3920-00490 Zaytran M990606 Pneumatic Parallel Gripper, NEW

AMAT 0021-13768 BASE, INNER, ROLLERY ASSEMBLY, BRUSH MOD , USED

LAMBDA NNS15-5 POWER SUPPLY NNS Series 5V 3A 110/220VAC , USED

AMAT 0140-03543 AC2 REV 001,USED

Advanced Energy 3155077-001A FixedMatch RF Match MFA Multifunction Adapter

AMAT 0140-77632 C/A HD SWP1-4 MTR DRIVER, NEW

AMAT 0010-09416 RF MATCH PHASE IV P5000 , USED

AMAT 0140-77424 CABLE MIDDLE COVER SWITCH CABLE/HARNESS, NEW

YASKAWA SGDH-1AAE SERVORACK 200V, WORKING

AMAT 0140-78510 CABLE ASSEMBLY POWER DISTRIBUTION,USED

HMI 77-604-01020E0-002 DEFLECTION DRIVER NEW TYPE F1DDC-C , USED

HMI 77-604-031110 IMAGE COMPENSATION UNIT  , USED

AMAT 0150-77205 CNTRL BKHD AD CONDITION 1 P6,USED

AMAT 0270-00735 CALIBRATION TOOL ROBOT, 300MM HDPCVD, UL, NEW

AMAT 0010-12589 SEAL COVER ASSY, ROLLER ASSY, BRUSH MODULE, 200/300MM , USED

CKD 4GA121 Solenoid Valve,USED

AMAT 0200-02542 RING INSULATOR STEPPED PRODUCER ETCH, NEW

AMAT 0150-77258 CNTRL BKHD PAD CONDITION 1 P2,USED

AMAT 0010-09019 ETCH THROTTLE VALVE , USED

AMAT 0040-99949 SHELL ASSY,200MM,NOTCH(2),5MIC,0.8THK,S, NEW

AMAT 0050-70003 EXHST WELDMENT LLC SENSORS , USED

AMAT 0050-09057 Baratron 1/2 inch VCR Tube Weldment Cap Man , USED

AMAT 0010-00015 AC OUTLET SYS CONTROLLER , USED

emecanique  ZB2-BE102 Emergency Stop NO+NC Switch,USED

AMAT 0050-10115 TUBE WELDMENT CAP MAN VCR , USED

kuraFan UTOC1 FAN-SENSOR , USED

AMAT 0021-13767 BASE, OUTER, ROLLER ASSEMBLY, BRUSH MODU , USED

AMAT 0050-10863 PLUMBING WELDMENT ADAPTER SINGLE HE IN , USED

AMAT 0150-77203 CBL ASSY, CAROUSEL ENCODER, UMBILICAL 75,USED

AMAT 0050-10310 TUBE WELDMENT, VALVE, OZONATOR INPUT , USED

EBARA EPA-14S RECM-1 PRE AMP MAIN TABLE , USED

AMAT 0150-76002 ASSY CABLE LOADLOCK TC , USED

AMAT 0150-77204 CNTRL BKHD PAD CONDITION 1 P7,USED

AMAT 0050-10031 RESTRICTOR, WELDMENT, 8 SLOT, N2 PURGE , USED

HMI 77-604-050250-001-0 TRIPLE-BEAM Z-LASER HEIGHT DETECTOR , USED

FI-SCHUTZSCHALTER F 362 CIRCUIT BREAKER  ABB 2pol, 25A, 0.03A, 230V, USED

LEYBOLD TMP-340MC Turbovac Turbo Pump Vacuum , USED

AMAT 0050-10026 PURGE WELDMENT, 8 SLOT STOR ELEV , USED

AMAT 0150-77211 CBL ASSY, SLURRY PUMP DRVR, CNTRLR-MNFRM,USED

AMAT 0010-77234 ASSY, DUAL SNSR END , USED

AMAT 0050-10029 N2 VENT WELDMENT, LOADLACK SIDE , USED

AMAT 0040-46173 BEARING HOUSING, BASE ASSY 200MM PAD CON , USED

AMAT 0190-19384 SPECIFICATION ASSY HUB 8 CHANNEL PYRO/EM , USED

AMAT 0190-28683 SPECIFICATION ASSY HUB 8 CHANNEL PYRO/EM , USED

AMAT 0140-78488 CABLE AC-POWER CLEANER,USED

AMAT 0020-79524 BEARING HOUSING , USED

AMAT 0050-30504 PLMB,WLDMNT,CH A,GAS PNL,VER. 4 TEOS , USED

FUJITSU COMPONENT LIMITED NC14003-T805 PS-108F , USED

AMAT 0140-78017 HARNESS CONTBULKHD HEADSWEEP-MAINFBKHD, USED

MKS 41A12DCA2AF003 Baratron Pressure Switch 100 Torr-G , USED

LEYBOLD MAG W 1300 C 400110V0021 TURBO PUMP, WORKING

AMAT 0140-77349 Harness, AC Power FABS,USED

AMAT 0190-12377 SPEC., SLAVE CONTROLLER KAWASAKI AA ROBO 30C61C-B002

YASKAWA SGDS-01A32A SERVO DRIVER, USED

AMAT 0150-77106 CBL ASSY, POWER PCOND,USED

AMAT 0190-70030 CABLE ASSY BLADE VAC SENSE VCR FTG, USED

MSPL LFC-8300-T2103-072-N-002 LIQUID FLOW CONTROLLER , USED

NIPPON THERMO ICP30-N-1-1-5 Circuit protector, 15A, USED

Swagelok SS-4BY-V35-1C Switching Bellows-Sealed Valve , USED

VARIAN TYPE 0536 TC VACUUM GAUGE , USED

Entegris 972-80406-91 Teflon Regulator , USED

VARIAN NW-25-A/O Air-Operated Right-Angle Aluminum Block Valve , USED

Honeywell MICRO SWITCH AML 20 SERIES 0442 L173 2A 250 VAC 3A 125 VAC , USED

PHOENIX CONTACT DEK1.5 RELAY , USED

Entegris 972-70406-72 Teflon Regulator , USED

SMC PSE561-01 VACUUM SERIES SENSOR , USED

AMAT 0720-04020 CONN BOOT KIT, ROTARY, NEW

AMAT 3060-00275 BALL BEARING 12MM BORE X 28MM OD X 8MM W/ VIT, NEW

FINDER 95.85.3 type 44.52 , USED

MALEMA MFC-8300-T2103-072-N-002 LIQUID FLOW CONTROLLER , USED

AMAT 0021-23335 LOCK SPLASH GUARD HOUSING SCRUBBER, NEW

AMAT 0050-09789 VALVE WLDMNT, FINAL VALVE, VER 4 TEOS , USED

AMAT 0020-78400 LEFT HOOK STAND, NEW

AMAT 0040-34842 ASSY, WELDED MEMBRANE HOLDER, MEG ENCLOSURE, 300MM HVM , USED

AMAT 0040-08887 EXHAUST WELDED ASSY, MEG 300 , USED

AMAT 0020-77435 CAP, LOADCUP, NEW

AMAT 0040-78250 CHAMBER, WELDED ASSY , USED

AMAT 0020-03700 SUPPORT REV. P1, NEW

BECKHOFF BK5220 DEVICENET COUPLER KL1501 2 KL9010 , USED

AMAT 0021-77126 ROLLERS HOLDER, ROLLER ASSY, NEW

AMAT 0021-77376 MOUNT, REGU. BRKT PURGE & VAC-GEN PEDEST, NEW

CKD NRB500A-SC4-L 0.05-0.35MPA TEMP RANGE(5hole),USED

AMAT 0090-77280 HARNESS, SWITCH, LIQ. LEVEL LO, BRUSH LD, NEW

AMAT 0020-79496 SENSOR MOUNT, NEW

EXCEL 5K3356 1013A RETROREFLECTOR , USED

EXCEL 5C3249 1013A RETROREFLECTOR , USED

CKD NRB500A-SC4-L 0.05-0.35MPA TEMP RANGE (9hole) ,USED

APC SU420INET Smart-UPS 420VA 230V 260W 1.9A , USED

AMAT 1030-01023 SWITCH MAGNET, NEW, LOT 4

AMAT 0140-12877 HARNESS, PLATEN CODER WTRS MNFRM BULKHEA, NEW

FURON 1108414 MANIFOLD VALVE BLOCK , USED

CKD RB500A-LLC4-L 0.05-0.35MPA TEMP RANGE(1hole),USED

PLAST-O-MATIC VALVES BSDA100T-NC-PP AIR OPERATED DIAPHRAGM, NEW

AMAT 0020-78365 SPRING BUSHING, CENTERING ARM, LOADCUP, NEW

Tokyo Electron 3880-200038 Controoler , USED

AMAT 0870-01024 DRIVER,SERVOMOTOR 200V, 200W , USED

CKD FSM-H-D,FSM-V-AH3-R0050-H4 RAPIFLOW CENSOR,FLOW SENSOR,USED

YASKAWA 999ZZZ-0571 BRITECH 5-CN HARNESS , USED

MITSUBISHI A6TBX70 Terminal Block , USED

AMAT 0140-05077 CABLE ANALOG A0 CNTRL BACKPLANE - POLISH,USED