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美***OMEGA歐米茄DRA-DCC-8電流回路轉(zhuǎn)換器

DRA-DCC-8是***種基于微處理器的裝置，它將數(shù)字?jǐn)?shù)據(jù)轉(zhuǎn)換成八個(gè)連續(xù)的模擬電流回路。處理器控制數(shù)字輸入，處理單元的活動(dòng)存儲(chǔ)器并更新當(dāng)前輸出。對(duì)于從000 hex到fff hex的數(shù)字輸入范圍，該單元提供兩個(gè)用戶選擇的4至20 mA或0至20 mA的輸出電流范圍。***個(gè)并行端口和兩個(gè)串行端口可用。并行輸入端口接收由3位輸出通道地址和代表輸出電流值的12位數(shù)據(jù)組成的異步15位總線。DRA-DCC-8單元可與輸入總線并聯(lián)，并通過控制使能（E）輸入終端進(jìn)行選擇。裝置控制器持續(xù)掃描輸入數(shù)據(jù)字段，并將其與先前存儲(chǔ)的數(shù)據(jù)進(jìn)行比較。

美國(guó)OMEGA歐米茄DRA-DCC-8電流回路轉(zhuǎn)換器

Parallel/Serial Communications Ports

±0.1% Accuracy

12 Bit Resolution

Solid-State Technology

The DRA-DCC-8 is a microprocessor-based unit which converts digital data into eight continuous analog current loops. The processor controls the digital input, handles the active memory of the unit and updates the current outputs. For digital input range of 000 HEX to FFF HEX, the unit provides two user selected output current spans of either 4 to 20 mA or 0 to 20 mA. One parallel and two serial ports are available. The parallel input port receives an asynchronous 15 bit bus composed of a 3 bit output channel address and 12 bits of data representing the output current value. DRA-DCC-8 units can be connected in parallel to the input bus and selected by controlling the Enable (E) input terminal. The unit’s controller continuously scans the input data field and compares it to the previously stored data. When new data is encountered, the old data is replaced and the proper output current is updated. The DRA-DCC-8 provides both RS-232C and RS-422 full duplex serial communications ports. The RS-422 serial communications port enables use of up to eight DRA-DCC-8 units in a multi-drop configuration. A set of seven internal DIP switches enables parameters such as baud rate, unit identity code, digital input mode (parallel or serial) and output current span (4-20 mA or 0-20 mA) to be set by the user.

美***OMEGA歐米茄DRA-DCC-8電流回路轉(zhuǎn)換器

當(dāng)遇到新數(shù)據(jù)時(shí)，將替換舊數(shù)據(jù)并更新正確的輸出電流。DRA-DCC-8提供RS-232C和RS-422全雙工串行通信端口。RS-422串行通信端口允許在多點(diǎn)配置中使用多達(dá)8個(gè)DRA-DCC-8單元。***組七個(gè)內(nèi)部DIP開關(guān)允許用戶設(shè)置波特率、單位識(shí)別碼、數(shù)字輸入模式（并行或串行）和輸出電流范圍（4-20 mA或0-20 mA）等參數(shù)。