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16路模擬多路復用器DRA-RTM-8歐米茄OMEGA

八個3線100歐姆鉑電阻式溫度檢測器輸入

8個4-20 mA過程輸入

所有16個輸入都被多路復用成***個4-20 mA的輸出。

RTD輸入的100歐姆鉑線性化和引線長度補償

16路模擬多路復用器DRA-RTM-8歐米茄OMEGA

DRA-RTM-8是一個16通道模擬多路復用器。8個通道接受3線100 ohm PT RTD輸入，其他8個通道接受4-20 mA過程輸入。所有16個輸入都被多路復用成一個4-20 mA的電流回路輸出。選擇功能通過主機控制器（PLC程序）生成的四條二進制控制線執(zhí)行。DRA-RTM-8型是一種全固態(tài)單元，能夠在少于20微秒的切換時間內(nèi)多路復用輸入通道。每個RTD輸入都是完全信號調(diào)節(jié)的，包括用于粗通道測距的6 DIP開關陣列，以及用于精細測距的前面板上的零點和量程微調(diào)器。應特別注意引線長度補償參數(shù)，因為與普通變送器不同，DRA-RTM-8可安裝在距離RTD傳感器相對較遠的位置。DRA-RTM-8的4-20 mA輸出線性化為RTD輸入。DRA-RTM-8的高精度和簡單操作使其成為一個非常有吸引力的單元，通過減少對昂貴的PLC或數(shù)據(jù)采集模擬輸入的需求，可以節(jié)省大量成本。

16路模擬多路復用器DRA-RTM-8歐米茄OMEGA

Eight 3-Wire 100 Ohm Platinum RTD Inputs

Eight 4-20 mA Process Inputs

All 16 Inputs are Multiplexed into a Single 4-20 mA Output

100 Ohm Platinum Linearization and Lead Length Compensation for RTD Inputs

The DRA-RTM-8 is a 16 channel analog multiplexer. Eight channels accept 3-wire 100 Ohm Pt RTD inputs, and the other eight channels accept 4-20 mA process inputs. All 16 inputs are multiplexed into a single 4-20 mA current loop output. The selection function is performed via four binary control lines generated by the host controller (PLC program). Model DRA-RTM-8 is an all solid state unit that multiplexes the input channels at a switching time of less than 20 microseconds. Each of the RTD inputs is completely signal conditioned including a 6 dip-switch array for coarse channel ranging as well as zero and span trimmers on the front panel for fine ranging. Special attention is given to the lead length compensation parameter because, unlike ordinary transmitters, the DRA-RTM-8 could be mounted relatively far from the RTD sensors. The 4-20 mA output from the DRA-RTM-8 is linearized to the RTD input. The DRA-RTM-8’s superb accuracy and simple operation make it a very attractive unit allowing tremendous cost savings by reducing the need for expensive PLC or data acquisition analog inputs.