16路模拟多路复用器DRA-RTM-8欧米茄OMEGA

八个3线100欧姆铂电阻式温度检测器输入

8个4-20 mA过程输入

所有16个输入都被多路复用成***个4-20 mA的输出。

RTD输入的100欧姆铂线性化和引线长度补偿

16路模拟多路复用器DRA-RTM-8欧米茄OMEGA

DRA-RTM-8是一个16通道模拟多路复用器。8个通道接受3线100 ohm PT RTD输入，其他8个通道接受4-20 mA过程输入。所有16个输入都被多路复用成一个4-20 mA的电流回路输出。选择功能通过主机控制器（PLC程序）生成的四条二进制控制线执行。DRA-RTM-8型是一种全固态单元，能够在少于20微秒的切换时间内多路复用输入通道。每个RTD输入都是完全信号调节的，包括用于粗通道测距的6 DIP开关阵列，以及用于精细测距的前面板上的零点和量程微调器。应特别注意引线长度补偿参数，因为与普通变送器不同，DRA-RTM-8可安装在距离RTD传感器相对较远的位置。DRA-RTM-8的4-20 mA输出线性化为RTD输入。DRA-RTM-8的高精度和简单操作使其成为一个非常有吸引力的单元，通过减少对昂贵的PLC或数据采集模拟输入的需求，可以节省大量成本。

16路模拟多路复用器DRA-RTM-8欧米茄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.