美国NI C系列温度采集输入NI-9212是一款具有8个通道的模拟输入模块,用于采集温度信号。它提供最大差分模拟输入通道数量为8,采样率为95 S/s/通道,每个通道间的隔离电压高达60 Vrms。
NI-9212可以支持各种标准热电偶和微型热电偶(mini-TC)等传感器类型。它还具有通道间隔离的功能,可以保护通道免受电压冲击和瞬态电压的影响,适用于各种需要组隔离通道的应用场景,如大型家用电器测试、车载数据记录、电池栈测试以及各种其他噪声工业环境。
NI-9212的隔离电压是通过在输入通道之间放置隔离器件实现的。这些隔离器件可以是隔离放大器、光耦、电磁继电器或其他隔离组件。通过这些隔离器件,NI-9212可以将输入通道之间的电压隔离,保护通道免受电压冲击和瞬态电压的影响。
具体来说,NI-9212在内部使用隔离放大器将输入信号与模块的其他部分分开。这种隔离技术可以有效地防止电气噪声和其他干扰信号对模拟输入信号的影响,从而提高测量精度和可靠性。
除了使用隔离放大器,NI-9212还采用了其他隔离技术,如光耦和电磁继电器等。这些隔离器件可以将输入信号与模块的其他部分完全分开,确保通道之间的隔离电压高于最大允许电压。
The NI-9212, a US NI C series temperature acquisition input module, is an analog input module with 8 channels used to collect temperature signals. It provides a maximum of 8 differential analog input channels, a sampling rate of 95 S/s/channel, and an isolation voltage of up to 60 Vrms between each channel.
NI-9212 can support various types of sensors such as standard thermocouples and micro thermocouples (mini TC). It also has the function of inter channel isolation, which can protect the channels from voltage shocks and transient voltages. It is suitable for various application scenarios that require group isolation channels, such as large-scale household appliance testing, on-board data recording, battery stack testing, and various other noisy industrial environments.
The isolation voltage of NI-9212 is achieved by placing isolation devices between input channels. These isolation devices can be isolation amplifiers, optocouplers, electromagnetic relays, or other isolation components. Through these isolation devices, NI-9212 can isolate the voltage between input channels, protecting them from voltage surges and transient voltages.
Specifically, the NI-9212 uses an isolation amplifier internally to separate the input signal from other parts of the module. This isolation technology can effectively prevent the influence of electrical noise and other interference signals on the analog input signal, thereby improving measurement accuracy and reliability.
In addition to using isolation amplifiers, NI-9212 also utilizes other isolation technologies such as optocouplers and electromagnetic relays. These isolation devices can completely separate the input signal from other parts of the module, ensuring that the isolation voltage between channels is higher than the maximum allowable voltage.
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