MOELLER LE4-116-XD1
咨詢熱線--17750626260
個(gè)人計(jì)算機(jī)(簡(jiǎn)稱PC)發(fā)展起來后,為了方便,也為了反映可編程控制器的功能特點(diǎn),可編程序控制器定名為Programmable Logic Controller(PLC),現(xiàn)在,仍常常將PLC簡(jiǎn)稱PC。
PLC的定義有許多種。國(guó)際電工委員會(huì)(IEC)對(duì)PLC的定義是:可編程控制器是一種數(shù)字運(yùn)算操作的電子系統(tǒng),專為在工業(yè)環(huán)境下應(yīng)用而設(shè)計(jì)。它采用可編程序的存貯器,用來在其內(nèi)部存貯執(zhí)行邏輯運(yùn)算、順序控制、定時(shí)、計(jì)數(shù)和算術(shù)運(yùn)算等操作的指令,并通過數(shù)字的、模擬的輸入和輸出,控制各種類型的機(jī)械或生產(chǎn)過程??删幊绦蚩刂破骷捌溆嘘P(guān)設(shè)備,都應(yīng)按易于與工業(yè)控制系統(tǒng)形成一個(gè)整體,易于擴(kuò)充其功能的原則設(shè)計(jì)。
上世紀(jì)80年代至90年代中期,是PLC發(fā)展快的時(shí)期,年增長(zhǎng)率一直保持為30~40%。在這時(shí)期,PLC在處理模擬量能力、數(shù)字運(yùn)算能力、人機(jī)接口能力和網(wǎng)絡(luò)能力得到大幅度提高,PLC逐漸進(jìn)入過程控制領(lǐng)域,在某些應(yīng)用上取代了在過程控制領(lǐng)域處于統(tǒng)治地位的DCS系統(tǒng)。
YAMATAKE-HONEYW?ELL 10.8-26.4VDC PHOTOELECTRIC SENSOR HPJ-E21-008
DYNAPAR ROTARY ENCODER AI2512122B92F
BANNER VALU-BEAM 915 SER SENSOR, SMA915FQD, W ELECTROMECHANIC?AL RELAY OUTPUT NIB
DREXELBROOK CONTROL SENSOR 104231
ENCODER PRODUCTS INCREMENTAL SHAFT ENCODER 725I-R-OC
DELPHI OXYGEN SENSOR ES10660 NIB
SENSOTEC TJE / 882-18TJD PRECISION GAGE / ABSOLUTE PRESSURE TRANSDUCER, NNB
BANNER FIBER OPTIC CABLE 21297 NIB
TURCK 18MM TEFLON-COATED SENSOR MOUNT NIB QM 18-T / A2546
NAMCO PROXIMITY SWITCH NIB EE510-86040
BANNER SMBPVA16A / 62449 PROTECTIVE BRACKET KIT, NIB
PHD INC. 117V SENSOR / TRANSDUCER 9799-01-0100
TCS TEMPERATURE SENSOR TX1504 NIB
GUARDIAN ACCELEROMETER MOUNTING SYSTEM 7002 NIB
RSF ELEKTRONIK DG 118 ROTARY ENCODER 990002011656
IFM EFECTOR FLOW SENSOR SI8507 NIB
NAMCO 0.5A 20-230V AC/DC 3000 PSI CYLINDICATOR PROXIMITY SENSOR EE230-38720
SCHAEVITZ LINEAR VARIABLE SENSOR 02350531-000 / PCA-116-100 NIB
EMERSON ELECTRIC CHROMALOX 30AMPS 277VAC TEMPATURE CONTROL AR-515P
FOXBORO PLATINUM TEMPATURE DETECTOR PR-13UBS-010 102268
BANNER MULTI-BEAM POWER BLOCK LR41887 NIB
KEYENCE 24 VCD TRANSMITTER SL-C24H-T 101349
ACCU-SORT SYSTEMS INC. LASER SCANNER MODEL-70 70AA
SICK * MSLZ SAFETY LIGHT CURTAIN * MSLZ01-15022C
SICK 18-30VDC LUMINESCENCE SENSOR LUTI-530
FOXBORO 2800 SERIES 316SS ELECT MAGNETIC FLOW TRANSMITTER 2810-SABA-TS
TORK 50-60HZ 1800VA 208-277V PHOTOCONTROL 2104
SICK * 30-FGS SAFETY LIGHT CURTAIN * FGSS 750-23