DMS-40LCD-4工业自动化与控制的面板仪表规格书PDF中文资料

DMS-40LCD-4属于工业自动化与控制的面板仪表。由村田制作所制造生产的DMS-40LCD-4面板仪表面板仪表是使用模拟指针或其他物理指示器或数字字符以可视方式显示输入信号的仪器。许多面板仪表还包括可用于报警选项的辅助输出，以及将数据或参考信号传输到计算机或微控制器的功能。面板仪表可根据测量范围、显示类型、字符/指示器属性和供电电压进行选择。仪表类型包括电流、电压、频率、过程、电阻、温度和功率。

The DMS-40LCD-4/20S’s ultra-low 2.9V typical loop-drop (190-Ohm burden) makes it ideal for use in 4-20mA process monitoring applications which have two or more series connected loop-monitoring devices. The low loop-burden means it can be used in current loops that are powered from supply voltages as low as +8Vdc! The DMS-40LCD-4/20S is self-powered; all required operating power is derived directly from the current loop itself. It requires no separate dc power supply or special grounding considerations and can be connected ANYWHERE in the loop!

The DMS-40LCD-4/20Ss input, span, and offset circuits all employ super-stable, ±0.5 thin-film chip resistors. Long-term stability and accuracy are assured by driving these tight-tolerance resistors with an ultra-stable, ±0.2 band-gap voltage reference. Unlike many competitor’s designs, the two precision 20-turn span and zero adjust potentiometers do not interact with one another. Its full-size, 0.40 (10.0mm) high-contrast 4½ digit LCD display offers 19,999 counts of resolution and can be read in virtually any lighting condition—including full sunlight!

All range-change and decimal point selections are made by configuring two gold-plated, vibration-resistant, six-position DIP switches. The two connections to the current loop are made via a reliable, screw-type terminal block. To further enhance reliability, the design features 100 soldered connections—no troublesome zebra/elastomercic connectors are used. All these outstanding features make the DMS-40LCD-4/20S the highest quality, most rugged, 4½ digit, LCD-display process monitor available.

FEATURES

■ Loop-powered, no power supply required!

■ 2.9V typical loop-drop; 190-Ohm (max.) loop impedance

■ Dip-switch-selectable range, offset, and decimal points

■ Hundreds of different input/readout combinations

■ Non-interacting gain (span) and offset (zero) 20-turn potentiometers

■ Large, 0.40 (10.0mm) high, sunlight-viewable LCD digits

■ Miniature size: 2.17 x 0.92 x 0.90 (55mm x 23mm x 23mm)

■ Vibration-resistant package; reliable screw terminal connections

■ 100 soldered connections