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Allen-Bradleny開(kāi)關(guān)現貨供應

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—————————————Allen-Bradleny限位開(kāi)關(guān)*———————————————

限位開(kāi)關(guān)是一種常用的小電流主令電器。利用生產(chǎn)機械運動(dòng)部件的碰撞使其觸頭動(dòng)作來(lái)實(shí)現接通或分斷控制電路，達到一定的控制目的。通常，這類(lèi)開(kāi)關(guān)被用來(lái)限制機械運動(dòng)的位置或行程，使運動(dòng)機械按一定位置或行程自動(dòng)停止、反向運動(dòng)、變速運動(dòng)或自動(dòng)往返運動(dòng)等。
行程開(kāi)關(guān)按其結構可分為直動(dòng)式、滾輪式、微動(dòng)式和組合式。
直動(dòng)式行程開(kāi)關(guān)
動(dòng)作原理同按鈕類(lèi)似，所不同的是：一個(gè)是手動(dòng)，另一個(gè)則由運動(dòng)部件的撞塊碰撞。當外界運動(dòng)部件上的撞塊碰壓按鈕使其觸頭動(dòng)作，當運動(dòng)部件離開(kāi)后，在彈簧作用下，其觸頭自動(dòng)復位。
其結構原理如圖F1所示，其動(dòng)作原理與按鈕開(kāi)關(guān)相同，但其觸點(diǎn)的分合速度取決于生產(chǎn)機械的運行速度，不宜用于速度低于0.4m/min的場(chǎng)所。
直動(dòng)式行程開(kāi)關(guān)組成
1：推桿　2&4：彈簧　3：動(dòng)斷觸點(diǎn)　5：動(dòng)合觸點(diǎn)
滾輪式行程開(kāi)關(guān)
當運動(dòng)機械的擋鐵(撞塊)壓到行程開(kāi)關(guān)的滾輪上時(shí)，傳動(dòng)杠連同轉軸一同轉動(dòng)，使凸輪推動(dòng)撞塊，當撞塊碰壓到一定位置時(shí)，推動(dòng)微動(dòng)開(kāi)關(guān)快速動(dòng)作。當滾輪上的擋鐵移開(kāi)后，復位彈簧就使行程開(kāi)關(guān)復位。這種是單輪自動(dòng)恢復式行程開(kāi)關(guān)。而雙輪旋轉式行程開(kāi)關(guān)不能自動(dòng)復原，它是依靠運動(dòng)機械反向移動(dòng)時(shí)，擋鐵碰撞另一滾輪將其復原。
其結構原理如圖F2所示，當被控機械上的撞塊撞擊帶有滾輪的撞桿時(shí)，撞桿轉向右邊，帶動(dòng)凸輪轉動(dòng)，頂下推桿，使微動(dòng)開(kāi)關(guān)中的觸點(diǎn)迅速動(dòng)作。當運動(dòng)機械返回時(shí)，在復位彈簧的作用下，各部分動(dòng)作部件復位。
1：滾輪　2：上轉臂　3&5&11：彈簧　4：套架
6：滑輪　7：壓板　8&9：觸點(diǎn)　10：橫板
滾輪式行程開(kāi)關(guān)又分為單滾輪自動(dòng)復位和雙滾輪(羊角式)非自動(dòng)復位式，雙滾輪行移開(kāi)關(guān)具有兩個(gè)穩態(tài)位置，有“記憶"作用，在某些情況下可以簡(jiǎn)化線(xiàn)路。
微動(dòng)開(kāi)關(guān)式行程開(kāi)關(guān)
微動(dòng)開(kāi)關(guān)式行程開(kāi)關(guān)的組成，以常用的有LXW-11系列產(chǎn)品為例，其結構原理如圖F3所示：
1：推桿　2：彈簧　3：動(dòng)合觸點(diǎn)　4：動(dòng)斷觸點(diǎn)　5：壓縮彈簧
一般用途行程開(kāi)關(guān)：如JW2、JW2A、LX19、LX31、LXW5、3SE3等系列。主要用于機床及其他生產(chǎn)機械、自動(dòng)生產(chǎn)線(xiàn)的限位和程序控制。
起重設備用行程開(kāi)關(guān)，如LX22、LX33系列。主要用于限制起重設備及各種冶金輔助機械的行程。
行程開(kāi)關(guān)主要用于將機械位移轉變成電信號，使電動(dòng)機的運行狀態(tài)得以改變，從而控制機械動(dòng)作或用作程序控制。
行程開(kāi)關(guān)真正的用武之地是在工業(yè)上，在那里它與其它設備配合，組成更復雜的自動(dòng)化設備。
機床上有很多這樣的行程開(kāi)關(guān)，用它控制工件運動(dòng)或自動(dòng)進(jìn)刀的行程，避免發(fā)生碰撞事故。有時(shí)利用行程開(kāi)關(guān)使被控物體在規定的兩個(gè)位置之間自動(dòng)換向，從而得到不斷的往復運動(dòng)。比如自動(dòng)運料的小車(chē)到達終點(diǎn)碰著(zhù)行程開(kāi)關(guān)，接通了翻車(chē)機構，就把車(chē)里的物料翻倒出來(lái)，并且退回到起點(diǎn)。到達起點(diǎn)之后又碰著(zhù)起點(diǎn)的行程開(kāi)關(guān)，把裝料機構的電路接通，開(kāi)始自動(dòng)裝車(chē)?？偸沁@樣下去，就成了一套自動(dòng)生產(chǎn)線(xiàn)，用不著(zhù)人管，日以繼夜地工作，節省了人的體力勞動(dòng)。

—————————————Allen-Bradleny限位開(kāi)關(guān)現貨———————————————

TRANE BINARY OUTPUT WITH OVERRIDE BOARD S5010-0821-62 *NEW IN BOX*

GE GENERAL ELECTRIC SERIES ONE PROGRAMMABLE CONTROLLER IC610PRG100B

ELVA CONTROL MODULE MIFC

TRANE UCP3 STARTER MODULE 6400-1122-03 REV. B

MITSUBISHI ELECTRIC CPU UNIT A1SHCPU

BOSTON CONTROL BOARD 106703903 REV. B

EBYTE RS-232 TO CURRENT LOOP CONVERTER 65A

SIEMENS SINUMERIC COMPACT INPUT MODULE 6FC5111-0CA01-0?AA0

SIEMENS SIMATIC TI305-0IT RELAY OUTPUT MODULE 305-0IT
SPARC/CPU-5VT
INGERSOLL RAND CONTROL MODULE 99388019 R08

INTERMATIC ELECTRONIC 7-DAY TIME SWITCH ET715C

TANTEC 120V 2 OUTLET E SERIES POWER PACK, 4E00112

SIEMENS SIMATIC S7 ANALOG OUTPUT MODULE 6ES7 135-4FB00-0AB0 WITH BASE

ALLEN BRADLEY FLEX I/O MODULE 1794-OAB SER A W/ BASE 1794-TB3 SER. A
1784-PKTX
DIGITAL ELECTRONICS CORP MEMORY BOARD 5017068-01

TEXAS INSTRUMENTS CONTROL MODULE 565-2120

HONEYWELL ACO CONTROL BOARD EZV505

OPTO 22 3A 60VDC OUTPUT MODULE G4 ODC5 *LOT OF 5*

EMECANIQUE ABE7 H16R50 INTERFACE MODULE, NIB

KRAFEKTRONIK CONTROL BOARD MK 380B

USON 486 CPU CARD 486A300H

SCHNEIDER TSX PREMIUM 12-SLOT CHASSIS TSXRKY12

HOBART EXPANSION PC BOARD 192108

ALLEN BRADLEY 120VAC INPUT MODULE 1791-16A0 SER. B

ALLEN BRADLEY PLC-5/11 PROCESSOR MODULE 1785-L11B/C F/W REV. H

DAYTRONIC FREQUENCY TO VOLTAGE CONDITIONER MODULE 9140

NEATEK PCISA BUS BACKPLANE BOARD IP-6S VER 1.1

KURT 4-CHANNEL LVDT INTERFACE MODULE KurtUSB LVDT

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