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16路模擬多路復(fù)用器DRA-RTM-8歐米茄OMEGA

八個(gè)3線100歐姆鉑電阻式溫度檢測(cè)器輸入

8個(gè)4-20 mA過程輸入

所有16個(gè)輸入都被多路復(fù)用成***個(gè)4-20 mA的輸出。

RTD輸入的100歐姆鉑線性化和引線長(zhǎng)度補(bǔ)償

16路模擬多路復(fù)用器DRA-RTM-8歐米茄OMEGA

DRA-RTM-8是一個(gè)16通道模擬多路復(fù)用器。8個(gè)通道接受3線100 ohm PT RTD輸入，其他8個(gè)通道接受4-20 mA過程輸入。所有16個(gè)輸入都被多路復(fù)用成一個(gè)4-20 mA的電流回路輸出。選擇功能通過主機(jī)控制器（PLC程序）生成的四條二進(jìn)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(shí)間內(nèi)多路復(fù)用輸入通道。每個(gè)RTD輸入都是完全信號(hào)調(diào)節(jié)的，包括用于粗通道測(cè)距的6 DIP開關(guān)陣列，以及用于精細(xì)測(cè)距的前面板上的零點(diǎn)和量程微調(diào)器。應(yīng)特別注意引線長(zhǎng)度補(bǔ)償參數(shù)，因?yàn)榕c普通變送器不同，DRA-RTM-8可安裝在距離RTD傳感器相對(duì)較遠(yuǎn)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(jiǎn)單操作使其成為一個(gè)非常有吸引力的單元，通過減少對(duì)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(fù)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.