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美***OMEGA歐米茄DRA-MDM-11模擬多路復用/解復用系統(tǒng)

通過***對導線精確傳輸多達16個4-20 mA過程電流回路信號

節(jié)省電纜和安裝成本

±0.1%精度

故障報警

固態(tài)技術

美國OMEGA歐米茄DRA-MDM-11模擬多路復用/解復用系統(tǒng)

DRA-MDM-11是一個多路復用/分路系統(tǒng)，它通過一對電線精確傳輸模擬信息。多路復用器單元（DRA-M-11）可接受多達16個4-20 mA的過程電流輸入。多路復用輸入以高達1000道/秒的掃描速率傳輸?shù)浇鈴陀闷鲉卧―RA-DM-11），傳輸距離為2公里（1.2英里）。在解復用器中，電流輸出以與輸入相同的順序和幅度進行復制。分路器配有警報（閃爍的LED和干觸點輸出），當由于多路復用器故障、電纜不連續(xù)或短路而導致通信中斷時，該警報將運行。使用DRA-MDM-11 mux/demux系統(tǒng)可以顯著降低新安裝的布線成本，或在現(xiàn)有安裝中大幅擴展模擬數(shù)據傳輸能力。

美***OMEGA歐米茄DRA-MDM-11模擬多路復用/解復用系統(tǒng)

Transfer up to Sixteen 4-20 mA Process Current Loop Signals Accurately Via a Single Pair of Wires

Saves Cable and Installation Costs

± 0.1% Accuracy

Failure Alarm

Solid-State Technology

The DRA-MDM-11 is a mux/demux system which transfers analog information accurately via a single pair of wires. The multiplexer unit (DRA-M-11) accepts up to sixteen 4-20 mA process current inputs. The multiplexed inputs are transferred to the demultiplexer unit (DRA-DM-11) at a scan rate of up to 1000 channels/sec up to a distance of 2 kilometers (1.2 miles). At the demultiplexer the current outputs are reproduced in the same order and magnitude as the inputs. The demultiplexer is provided with an alarm (flashing LED and dry contact output) which is operated whenever there is any interruption in communication due to mux failure, cable discontinuity or short-circuit. Use of the DRA-MDM-11 mux/demux system enables a considerable reduction in cabling costs for a new installation or considerable expansion of analog data transfer capability in an existing installation.