美***OMEGA欧米茄DRA-CSM-1电流复用器

将16个4-20 mA输入多路复用成***个4-20 mA输出

±0.01%精度

由4个离散输入控制的信道选择

固态技术

经济型PLC升***

美国OMEGA欧米茄DRA-CSM-1电流复用器

DRA-CSM-1电流多路复用器是一种固态多路复用器，能够在不到10微秒的时间内以高于0.01%的精度将选定的4-20 mA输入电流信号传输到输出终端。DRA-CSM-1通常由PLC控制，从而获得完整的数据同步。DRA-CSM-1配有单元启用/禁用控制线，该控制线可使多个多路复用器并行连接到同一控制器输入。根据检查设备硬件的自检程序，禁用设备的周期用于自检。DRA-CSM-1型由外部直流电源供电。每个两线4-20 mA变送器连接到输入终端。每个通道为连接的两线发射机提供一个限流电压电源。多路复用器选择的信道被引导到控制设备（例如，PLC）的模拟输入端。多路复用器向未选择的信道保持功率，从而保持发射机电流不间断流动。多路复用器上的每个4-20 mA输入通道都有自己的红色LED状态灯，当回路中存在电流时，该灯就会亮起。

美***OMEGA欧米茄DRA-CSM-1电流复用器

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.