DATAFORTH模拟电压输入模块SCM5B38-05技术参数

DATAFORTH模拟电压输入模块SCM5B38系列介绍

描述

每个SCM5B38应变计输入模块提供一个单通道应变计输入，该输入经过滤波、隔离、放大，并转换为高电平模拟电压输出（图1）。该电压输出由逻辑开关控制，这使得这些模块可以共享一个公共模拟总线，而无需外部多路复用器。

SCM5B模块设计有一个完全隔离的计算机侧电路，可以在与电源公共端（第16针）之间悬浮±50V。这种完全隔离意味着无需在I/O公共端与电源公共端之间连接即可实现输出开关的正常操作。如果需要，输出开关可以通过简单地将读取使能针（第22针）连接到I/O公共端（第19针）来连续开启。

SCM5B38可以与额定电阻为100欧姆至10千欧姆的全桥或半桥传感器接口。匹配的一对桥接完成电阻器（在+10V激励电压下精度达到±1mV）允许使用低成本半桥或四分之一桥传感器（图2、3、4）。10kHz的带宽允许对振动分析等高速过程进行测量。

模块提供的应变计激励由一个非常稳定的10V或3.333V电源提供。激励电源是完全隔离的，允许放大器输入在激励电压的全范围内操作。此功能在现实应用中提供了显著的灵活性。标准提供2mV/V、3mV/V或10mV/V的满量程灵敏度。在10V激励电压下，这将产生±20mV、±30mV或±100mV满量程输入范围，产生±5V满量程输出。

输入信号通过隔离屏障现场侧的一个预放大器进行处理。该预放大器的增益带宽积为5MHz，并将带宽限制在10kHz。经过放大后，输入信号由专有的斩波电路切换。隔离通过变压器耦合提供，再次使用专有技术来抑制共模尖峰或浪涌的传输。模块由+5VDC供电，±5%。

SCM5B38模块上的特殊输入电路提供信号输入和隔离激励电源的保护，最高可达240VAC。

特点

接口适用于100欧姆至10千欧姆的全桥、半桥或四分之一桥应变计

高电平电压输出

1500Vrms变压器隔离

ANSI/IEEE C37.90.1瞬态保护

输入持续保护至240VAC

完全隔离的激励电源

100dB共模抑制比

10kHz信号带宽

±0.03%精度

±0.01%线性度

±1µV/°C漂移

CSA认证，FM批准，符合CE和ATEX标准

可在背板上混合和匹配SCM5B类型

Description

Each SCM5B38 Strain Gage input module provides a single channel of strain gage input which is filtered, isolated, amplified, and converted to a high-level analog voltage output (Figure 1). This voltage output is logic switch controlled, which allows 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.

The SCM5B38 can interface to full-bridge or half-bridge transducers with a nominal resistance of 100 Ohm to 10 kOhm. A matched pair of bridge-completion resistors (to ±1mV at +10V excitation) allows use of low cost half-bridge or quarter-bridge transducers (Figures 2, 3, 4). The 10kHz bandwidth allows measurement of high speed processes such as vibration analysis.

Strain gage excitation is provided from the module by a very stable 10V or 3.333V source. The excitation supply is fully isolated, allowing the amplifier inputs to operate over the full range of the excitation voltage. This feature offers significant flexibility in real world applications. Full scale sensitivities of 2mV/V, 3mV/V or 10mV/V are offered as standard. With 10V excitation, this results in ±20mV, ±30mV or ±100mV full scale input range producing ± 5V full scale output.

The input signal is processed through a pre-amplifier on the field side of the isolation barrier. This pre-amplifier has a gain-bandwidth product of 5MHz and is bandwidth limited to 10kHz. After amplification, 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%.

Special input circuits on the SCM5B38 module provide protection of the signal inputs and the isolated excitation supply up to 240VAC.

Features

Interfaces to 100 Ohm Thru 10 kOhm, Full-Bridge, Half-Bridge, or Quarter-Bridge Strain Gages

High-Level Voltage Output

1500Vrms Transformer Isolation

ANSI/IEEE C37.90.1 Transient Protection

Input Protected to 240VAC Continuous

Fully Isolated Excitation Supply

100dB CMR

10kHz Signal Bandwidth

±0.03% Accuracy

±0.01% Linearity

±1µV/°C Drift

CSA Certified, FM Approved, CE and ATEX Compliant

Mix and Match SCM5B Types on Backpanel

DATAFORTH模拟电压输入模块SCM5B38系列其他常用型号：

DATAFORTH SCM5B38-01

DATAFORTH SCM5B38-01D

DATAFORTH SCM5B38-02

DATAFORTH SCM5B38-02D

DATAFORTH SCM5B38-03

DATAFORTH SCM5B38-03D

DATAFORTH SCM5B38-04

DATAFORTH SCM5B38-04D

DATAFORTH SCM5B38-05

DATAFORTH SCM5B38-05D

DATAFORTH SCM5B38-06

DATAFORTH SCM5B38-06D

DATAFORTH SCM5B38-07

DATAFORTH SCM5B38-07D

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

爱泽工业成立于2010年，定位于向制造工业提供高端制造技术和设备。代理经营世界优质的电气自动化、机械与传动、流体控制、仪器仪表、工具等产品。作为电气，液压以及气动解决方案的合作伙伴，我们利用我们的全球协作团队，为客户提供先进解决方案，市场知识以及相关增值服务来帮助优化客户的工作效率，提高可靠性和安全性，致力于成为工业产品和解决方案的优质渠道。

如果有任何关于DATAFORTH模拟电压输入模块SCM5B38-05的疑问，请随时与我们沟通（021-31006702）。我们将尽全力解决您的问题。

If you have any question for DATAFORTH products, please feel free to dial 0086-21-3100 6702/ send request email to [email protected] / browse our website:www.ize-industries.com.

DATAFORTH模拟电压输入模块SCM5B38-05技术参数及介绍

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