AB 1769-L35CR CPU模块

PLC使用的元器件多为无触点的，而且为高度集成的，数量并不太多，也为其可靠工作提供了物质基础。

在机械结构设计与制造工艺上，为使PLC能安全可靠地工作，也采取了很多措施，可确保PLC耐振动、耐冲击。使用环境温度可高达摄氏50多度，有的PLC可高达80--90度。

有的PLC的模块可热备，一个主机工作，另一个主机也运转，但不参与控制，仅作备份。一旦工作主机出现故障，热备的可自动接替其工作。

还有更进一步冗余的，采用三取一的设计，CPU、I/O模块、电源模块都冗余或其中的部分冗余。三套同时工作，较终输出取决于三者中的多数决定的结果。这可使系统出故障的机率几乎为零，做到万无一失。当然，这样的系统成本是很高的，只用于特别重要的场合，如铁路车站的道叉控制系统。

暮景斜芳殿，年华丽绮宫。

共欢新故岁，迎送一宵中。

NUMATICS 239-1514 239-1384 PNEUMATIC MANIFOLD CONTROL MODULE ASSEMBLY D539148


GE FANUC IC600CP620K SERIES SIX PLUS RACK CHASSIS 11 SLOT 115-230V-AC D527175


ZETRON 950-9222 SERIES 4000 M4000 SH CONSOLE MODEM D524226


PYROPRESS T1102/050LT/PA1X TEMPERATURE SWITCH 20-70DEG C D538915


PYROPRESS T1102/050HT/PA4X TEMPERATURE SWITCH 150-230DEG C D538912


RTK P925X PANALARM INTERFACE CARD 24V-DC PCB CIRCUIT BOARD D531061


SUNPOWER SDU-150CQ1 48V-DC +5/+12/-12/-5V-DC 150W POWER SUPPLY D557562


FEAS TYPE PSW500L24 115/230V-AC 24V-DC 15A AMP POWER SUPPLY D550009


NUMATICS 239-1514 239-1384 PNEUMATIC MANIFOLD CONTROL MODULE ASSEMBLY D539316


24570505 24572CA MOS-AVOID STATIC RELAY PCB CIRCUIT BOARD D538992


AMETEK 80404SE INTERCONNECT PCB CIRCUIT BOARD D538997


HONEYWELL 30754919-501 DR4500 MOTHER PCB CIRCUIT BOARD ASSEMBLY KIT D553311


CIRCUIT-TEST PS-3030D 0-30V-DC 0-3A AMP POWER SUPPLY D531054


COPES VULCAN 86070200001 MC20 RECEIVER DRIVER CIRCUIT BOARD D539222


THERMO ENVIRONMENTAL 9783 OZONATOR ASSEMBLY D539167


PROTECTOWIRE MB-97-UC1 2600HD FIRESYSTEM PCB CIRCUIT BOARD D553184


WESTRONICS MC100252-01 MC100253-01 ALARM PANEL ASSEMBLY D553187


RICE LAKE RL20000ST-250 LOAD CELL 250LB D527734


YOKOGAWA B9901SH RECORDER ANALOG DIGITAL BOARD ASSEMBLY D523554


RIS RA2844-A PCB CIRCUIT BOARD D534834


RIS RA2810/13 PCB CIRCUIT BOARD D534835


P60-173 ECN 729 PCB CIRCUIT BOARD MODULE D523800


GEC ALSTHOM 3FBFA6400 ISTAT 300 FREQUENCY TRANSDUCER 0-750OHM 120V-AC D550031


ALSTOM EPSD-0372-00 TRANSMITTER PCB CIRCUIT BOARD D539402


BENTLY NEVADA 330901-00-08-05-01-00 3300 XL NSV PROXIMITY PROBE D553437


46S02135-0010 EBN 2861 POWER SUPPLY PCB CIRCUIT BOARD D539458


E19070 ENCODER D534844


STOCK V412501B01 Z10670-1 PCB CIRCUIT BOARD D534866


NEC 2W FXO 900 CHANNEL CARD PCB CIRCUIT BOARD D523798


GENERAL ELECTRIC GE 8CH7BAB1 0-15 AC VOLT-AMMETER DATA RECORDER D551298


COPES VULCAN 86067000002 MEC/MC 20 COMPUTER PCB CIRCUIT BOARD REV 2 D539469


HONEYWELL 51309397-001 ST3000 PCB CIRCUIT BOARD D553010


RTK P925A SYSTEM 9000 ACTIVE CARD 24V-DC INPUT MODULE D531266


ALSTOM 3WDFG6001A ISTAT 300 WATTS TRANSDUCER 0-750OHM 120V-AC 4-20MA D550042


ALSTOM 3VAFG6500A ISTAT 300 AREVA VOLTAGE TRANSDUCER 0-750OHM 0-150V-AC D550036


GEC ALSTHOM 3VAFG6500 ISTAT 300 VOLTAGE TRANSDUCER 0-750OHM 150V-AC D550040


GEC ALSTHOM 3PDGG6038I ISTAT 300 PHASE TRANSDUCER -60-0-60 DEG 120V-AC D550038


GEC ALSTHOM 3RDGG6001AC9DBAT ISTAT 300 VAR TRANSDUCER 0-750OHM 120V-AC D550043


GEC ALSTHOM 3CAFG65GK ISTAT 300 CURRENT TRANSDUCER 0-750OHM 4-20MA D550037


GE FANUC IC697MDL650 INPUT MODULE D550067


RAMSEY 10-151 UP MICRO-MASTER INTEGRATOR D531315


ETNA F 2843 ED 98 PRESSURE SWITCH D524695


ROBICON 401 244-1 30A AMP 1PH 240V-AC SCR POWER CONTROLLER D558595


ABB D5B-2F KILOWATTHOUR METER 120V-AC 0.12-10A AMP D557908


ASEA YM-517-0023 QIFL 260 LOW-PASS FILTER MODULE D557880


MERCOID 1005-W-B3-F PRESSURE SWITCH 3000PSI 125/250V-AC 5A AMP D558574


BENTLY NEVADA 81545-01 XDUCR I/O RECORD TERMINAL MODULE REV D D531464


AMETEK 80-214024-90 SOLIDSTATE CONTROLS PCB CIRCUIT BOARD D557471