DATAFORTH模拟电压输入模块SCM5B30-03技术参数

DATAFORTH模拟电压输入模块SCM5B30-03介绍

每个 SCM5B30 和 SCM5B31 电压输入模块均提供单通道模拟输入，经滤波、隔离、放大后转换为高电平模拟电压输出。该电压输出由逻辑开关控制，允许这些模块共享公共模拟总线，无需外部多路复用器。

SCM5B模块采用完全隔离的计算机侧电路设计，该电路可与电源公共端（引脚 16）浮动至 ±50V。这种完全隔离意味着输出开关正常工作时，I/O 公共端和电源公共端之间无需连接。如果需要，只需将引脚 22（读取使能引脚）连接到 I/O 公共端（引脚 19）即可持续开启输出开关。

信号滤波采用六极滤波器实现，该滤波器在 60Hz 时提供 95dB 的常模抑制比，在 50Hz 时提供 90dB 的常模抑制比。该滤波器的两个极点位于隔离栅的现场侧，另外四个极点位于计算机侧。

输入信号在经过初始现场滤波后，由专有斩波电路进行斩波。隔离采用变压器耦合，同样采用专有技术来抑制共模尖峰或浪涌的传输。该模块采用 +5VDC，±5% 的供电。

SCM5B30和 SCM5B31 模块上的特殊输入电路可防止意外连接高达 240VAC 的电源线电压。

Each SCM5B30 and SCM5B31 voltage input module provides a single channel of analog input which is filtered, isolated, amplified, and converted to a high-level analog voltage output (Figure 1). This voltage output is logic-switch controlled, allowing these modules to share a common analog bus without the requirement of external multiplexers.

The SCM5B modules are designed with a completely isolated computer side circuit which can be floated to ±50V from Power Common, pin 16. This complete isolation means that no connection is required between I/O Common and Power Common for proper operation of the output switch. If desired, the output switch can be turned on continuously by simply connecting pin 22, the Read-Enable pin, to I/O Common, pin 19.

Signal filtering is accomplished with a six-pole filter which provides 95dB of normal-mode rejection at 60Hz and 90dB at 50Hz. Two poles of this filter are on the field side of the isolation barrier, and the other four are on the computer side.

After the initial field-side filtering, the input signal is chopped by a proprietary chopper circuit. Isolation is provided by transformer coupling, again using a proprietary technique to suppress transmission of common mode spikes or surges. The module is powered from +5VDC, ±5%.

A special input circuit on the SCM5B30 and SCM5B31 modules provides protection against accidental connection of power-line voltages up to 240VAC.

DATAFORTH模拟电压输入模块SCM5B30系列其他常用型号：

DATAFORTH SCM5B30-03

DATAFORTH SCM5B30-01

DATAFORTH SCM5B30-01D

DATAFORTH SCM5B30-02

DATAFORTH SCM5B30-02D

DATAFORTH SCM5B30-03D

DATAFORTH SCM5B30-04

DATAFORTH SCM5B30-04D

DATAFORTH SCM5B30-05

DATAFORTH SCM5B30-05D

DATAFORTH SCM5B30-06

DATAFORTH SCM5B30-06D

DATAFORTH Analog Voltage Input Module NEW + ORIGINAL+ ONE YEAR WARRANTY

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DATAFORTH模拟电压输入模块SCM5B30系列SCM5B30-03技术参数及介绍

• DATAFORTH模拟电压输入模块SCM5B30-03