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美***OMEGA歐米茄DRA-CSM-1電流復(fù)用器

將16個(gè)4-20 mA輸入多路復(fù)用成***個(gè)4-20 mA輸出

±0.01%精度

由4個(gè)離散輸入控制的信道選擇

固態(tài)技術(shù)

經(jīng)濟(jì)型PLC升***

美國OMEGA歐米茄DRA-CSM-1電流復(fù)用器

DRA-CSM-1電流多路復(fù)用器是一種固態(tài)多路復(fù)用器，能夠在不到10微秒的時(shí)間內(nèi)以高于0.01%的精度將選定的4-20 mA輸入電流信號傳輸?shù)捷敵鼋K端。DRA-CSM-1通常由PLC控制，從而獲得完整的數(shù)據(jù)同步。DRA-CSM-1配有單元啟用/禁用控制線，該控制線可使多個(gè)多路復(fù)用器并行連接到同一控制器輸入。根據(jù)檢查設(shè)備硬件的自檢程序，禁用設(shè)備的周期用于自檢。DRA-CSM-1型由外部直流電源供電。每個(gè)兩線4-20 mA變送器連接到輸入終端。每個(gè)通道為連接的兩線發(fā)射機(jī)提供一個(gè)限流電壓電源。多路復(fù)用器選擇的信道被引導(dǎo)到控制設(shè)備（例如，PLC）的模擬輸入端。多路復(fù)用器向未選擇的信道保持功率，從而保持發(fā)射機(jī)電流不間斷流動(dòng)。多路復(fù)用器上的每個(gè)4-20 mA輸入通道都有自己的紅色LED狀態(tài)燈，當(dāng)回路中存在電流時(shí)，該燈就會(huì)亮起。

美***OMEGA歐米茄DRA-CSM-1電流復(fù)用器

Multiplexes Sixteen 4-20 mA Inputs Into One 4-20 mA Output

± 0.01% Accuracy

Channel Selection Controlled by 4 Discrete Inputs

Solid-State Technology

Economical PLC Upgrade

The DRA-CSM-1 Current Multiplexer is a solid state multiplexer capable of transferring the selected 4-20 mA input current signal to the output terminals in less than 10 microseconds at an accuracy better than 0.01%. The DRA-CSM-1 is typically controlled by a PLC thereby obtaining full data synchronization. The DRA-CSM-1 is provided with a unit enable/disable control line which enables the parallel connection of several multiplexers to the same controller input. The period during which the unit is disabled is used for self-testing according to a self-test procedure which checks the unit’s hardware. Model DRA-CSM-1 is powered by an external DC power supply. Each two-wire 4-20 mA transmitter is connected to the input terminals. Each channel provides a current limited voltage supply for the connected two-wire transmitter. The channel selected by the multiplexer is directed to the control device’s (e.g., PLC’s) analog inputs. Power is maintained by the multiplexer to the unselected channels thereby maintaining uninterrupted transmitter current flow. Each 4-20 mA input channel on the multiplexer has its own red LED status light which illuminates on presence of current in the loop.