產(chǎn)品詳情
型號(hào)
:石家莊2098-DSD-020-DN羅克韋爾伺服驅(qū)動(dòng)器廠家
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
:石家莊2098-DSD-020-DN羅克韋爾伺服驅(qū)動(dòng)器廠家3.P<Imin(Emin-IminRLmax)變送器的耗費(fèi)功率P不能超過上式,一般<90mW。式中:Emin=電源電壓,對(duì)大都外表而言Emin=24(1-5%)=22.8V,5%為24V電源答應(yīng)的負(fù)向改變量;Imax=20mA;Imin=4mA;RLmax=250Ω+傳輸導(dǎo)線電阻。若是變送器在規(guī)劃上滿意了上述的三個(gè)條件,就可完成兩線制傳輸。所謂兩線制即電源、負(fù)載串聯(lián)在一起,有一公共點(diǎn),而現(xiàn)場(chǎng)變送器與控制室外表之間的信號(hào)聯(lián)絡(luò)及供電僅用兩根電線,這兩根電線既是電源線又是信號(hào)線。