描述
60年代以前,汽車生產(chǎn)流水線的自動(dòng)控制系統(tǒng)基本上都是由繼電器控制裝置構(gòu)成。當(dāng)時(shí)汽車的每一次改型都直接導(dǎo)致繼電器控制裝置的重新設(shè)計(jì)和安裝。隨著生產(chǎn)的發(fā)展,汽車型號(hào)更新周期愈來愈短,這樣,繼電器控制裝置就需要經(jīng)常地重新設(shè)計(jì)和安裝,十分費(fèi)時(shí),費(fèi)工,費(fèi)料,甚至阻礙了更新周期的縮短。為了改變這一現(xiàn)狀,美國通用汽車公司在1969 年公開招標(biāo),要求用新的控制裝置取代繼電器控制裝置,并提出了著名的十項(xiàng)招標(biāo)指標(biāo),即:
1.編程方便現(xiàn)場可修改程序;
2.維修方便采用模塊化結(jié)構(gòu);
3.可靠性高于繼電器控制裝置;
4.體積小于繼電器控制裝置;
5.?dāng)?shù)據(jù)可直接送入管理計(jì)算機(jī);
6.成本可與繼電器控制裝置競爭;
7. 輸入可以是交流115V;
8.輸出為交流115V 2A 以上能直接驅(qū)動(dòng)電磁閥接觸器等;
9.在擴(kuò)展時(shí)原系統(tǒng)只要很小變更;
10.用戶程序存儲(chǔ)器容量至少能擴(kuò)展到4K。
產(chǎn)品承諾:
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時(shí)發(fā)貨,
保?證售后服務(wù)質(zhì)量,
優(yōu)勢價(jià)格,大量現(xiàn)貨。
主營DCS系統(tǒng)配件
機(jī)器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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