本公司供應(yīng)全新羅克韋爾1398-DDM-150伺服驅(qū)動(dòng)器ALLEN BRADLEY,價(jià)格優(yōu)惠,快速交貨,
型號(hào)
:涼山2098-DSD-020-DN羅克韋爾伺服驅(qū)動(dòng)器多少錢(qián)
Allen Bradley 1398-DDM-009-DN
Allen Bradley 1398-DDM-005X-NV
Allen Bradley 1398-DDM-005X-DN
Allen Bradley 1398-DDM-009X
Allen Bradley 1398-DDM-019-DN
Allen Bradley 1398-DDM-009X-DN
Allen Bradley 1398-DDM-005X
Allen Bradley 1398-DDM-005-DN
Allen Bradley 1398-DDM-005
Allen Bradley 1398-DDM-075X
Allen Bradley 1398-DDM-075
Allen Bradley 1398-DDM-010X
Allen Bradley 1398-DDM-010
Allen Bradley 1398-DDM-150
Allen Bradley 1398-DDM-020X
Allen Bradley 1398-DDM-020
Allen Bradley 1398-DDM-030X
Allen Bradley 1398-DDM-030
Allen Bradley 1398-DDM-019X-DN
Allen Bradley 1398-DDM-019X
Allen Bradley 1398-DDM-150X
Allen Bradley 1398-DDM-019
Allen Bradley 1398-DDM-009
:涼山2098-DSD-020-DN羅克韋爾伺服驅(qū)動(dòng)器多少錢(qián)b電路用的是2N3906三極管,PNP型,同樣把蜂鳴器LS2接在三極管的集電極,驅(qū)動(dòng)信號(hào)是5VTTL電平。由于2N3906其他參數(shù)和2N3904基本一致,因此計(jì)算過(guò)程不再贅述。以上這兩個(gè)電路圖都可以正常工作。的兩個(gè)電路和圖一相比,把蜂鳴器接在了三極管的發(fā)射極。在c電路,假設(shè)基極電壓為5V,基極電流Ib=(5V-0.7V-UL)/4.7K,其中UL為蜂鳴器上的壓降。如果UL比較大,那么相應(yīng)的Ib就小,很有可能Ib0.2mA,Ic20mA,無(wú)法驅(qū)動(dòng)蜂鳴器。