TDA1.1-100-3-A00每種數(shù)字輸出模塊均可對(duì)每點(diǎn)進(jìn)行專門的輸出表決器診斷（OVD）。一般而言，在OVD執(zhí)行過程中每一個(gè)點(diǎn)的狀態(tài)被逐點(diǎn)保存在輸出驅(qū)動(dòng)器上。在模塊上的反饋控制回路允許每個(gè)微處理器讀出此點(diǎn)的輸出值，以決定在輸出電路內(nèi)是否存在有潛在的故障。（對(duì)于那些任何躍變時(shí)間寬度都不能容忍的現(xiàn)場(chǎng)裝置，在AC和DC電壓數(shù)字輸出模塊上的OVD都可以被禁止）。
TDA1.1-100-3-A00監(jiān)督型數(shù)字輸出模塊同時(shí)具有電壓的和電流的反饋，具備在勵(lì)磁和非勵(lì)磁的工作狀態(tài)下故障的完全覆蓋。此外，監(jiān)督型數(shù)字輸出模塊還能對(duì)回路進(jìn)行連續(xù)校核，驗(yàn)證是否有現(xiàn)場(chǎng)負(fù)載存在。現(xiàn)場(chǎng)負(fù)載丟失或線路短路時(shí)，在模塊上有信號(hào)指示。
DC電壓數(shù)字輸出模塊是專門設(shè)計(jì)來控制那些現(xiàn)場(chǎng)設(shè)備可能長(zhǎng)期地保持于一種狀態(tài)。DC電壓數(shù)字輸出模塊的OVD診斷能確保完全的故障覆蓋率，即使各點(diǎn)的被命令狀態(tài)從不改變。在這種模塊上，一般只在OVD執(zhí)行期間輸出信號(hào)發(fā)生躍變，但被保證低于2毫秒（標(biāo)準(zhǔn)的是500微秒），并且對(duì)絕大多數(shù)現(xiàn)場(chǎng)設(shè)備是沒有影響的。
AC電壓數(shù)字輸出模塊上，TDA1.1-100-3-A00采用OVD診斷出故障的開關(guān)將會(huì)使輸出信號(hào)躍進(jìn)變?yōu)樽畲蟀雮€(gè)AC周期的反狀態(tài)，這種變化不會(huì)對(duì)現(xiàn)場(chǎng)設(shè)備造成影響。一旦故障被檢測(cè)出來，模塊就不再繼續(xù)進(jìn)行OVD。在AC電壓數(shù)字輸出模塊上的每個(gè)點(diǎn)都需要周期性的在ON在OFF狀態(tài)兩者上循環(huán)，以保證100%的故障覆蓋率。
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TDA1.1-100-3-A00
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TDA1.3-050-3-A00
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