Fuji SIT-2-ROP1旋轉編碼器是一種光電式旋轉測量裝置，它將被測的角位移直接轉換成數(shù)字信號（高速脈沖信號）。

　　編碼器如以信號原理來分，有增量型編碼器，型編碼器。

　　我們通常用的是增量型編碼器，可將旋轉編碼器的輸出脈沖信號直接輸入給plc，利用PLC的高速計數(shù)器對其脈沖信號進行計數(shù)，以獲得測量結果。不同型號的旋轉編碼器，其輸出脈沖的相數(shù)也不同，有的旋轉編碼器輸出A、B、Z三相脈沖，有的只有A、B相兩相，簡單的只有A相。

　　編碼器有5條引線，其中3條是脈沖輸出線，1條是COM端線，1條是電源線（OC門輸出型）。編碼器的電源可以是外接電源，也可直接使用PLC的DC24V電源。電源“-”端要與編碼器的COM端連接，“+ ”與編碼器的電源端連接。編碼器的COM端與PLC輸入COM端連接，A、B、Z兩相脈沖輸出線直接與PLC的輸入端連接，A、B為相差90度的脈沖，Z相信號在編碼器旋轉一圈只有一個脈沖，通常用來做零點的依據(jù)，連接時要注意PLC輸入的響應時間。旋轉編碼器還有一條屏蔽線，使用時要將屏蔽線接地，提高抗干擾性。

Fuji SIT-2-ROP1  

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