1794-IEB Flex I/O产品的一个组件模块 模拟输入模块

产品细节：1794-IEB Flex I/O产品的一个组件模块 模拟输入模块

Allen-Bradley 1794-IE8是Flex I/O产品系列的一个组件模块。该模块是一个模拟输入模块，与Flex I/O通信适配器和终端基座一起使用，用于实现分布式I/O架构。

使用该模块的八(8)个单端、非隔离、用户可配置通道，能够接收0至20 mA、4至20mA、+/- 10VDC和0至10VDC输入信号，该模块能够连接仪表，如现场变送器、模拟指示仪表、记录器、过程回路控制器和产生兼容信号范围的其他模拟仪表。

这款Flex I/O模拟输入模块配置为单极性模式时具有12位分辨率，配置为双极性模式时具有11位加号。它使用逐次逼近转换，并将转换后的数据保存为eft调整的16位2补码数据格式。它的转换率是256？所有通道的绝对精度为0.20%满量程(25°C时)，电压精度漂移为- 0.00428%满量程/°C，电流输入精度漂移为0.00407%满量程/°C。该模块不需要校准。

1794-IE8要求外部电源电压范围为10.5-31.2VDC，标称电源电压为24VDC。它需要60 mA的电源电流。它需要使用端子台来安装和连接输入信号线。兼容的终端碱基是1794-TB2、1794-TB3和1794-TB3S、1794-TB3T和1794-TB3T。该模块只需要一个端子座。

该Flex I/O模块与Flex I/O通信适配器兼容，如以太网、ControlNet、远程I/O适配器。

该模块不需要超出出厂设置的校准。它的尺寸为3.7 x 2.1 x 31.8英寸，可以安装在DIN导轨上或直接安装在面板上。1794-IE8模块可以安装在1794-TB2、1794-TB3S、1794-TB3ST、1794-TB3T或1794-TB3终端基本单元上。它还带有一个电源和状态指示器，并有一个开放式外壳。该模块的电压规格为24伏DC标称值，电源电压范围为10.5至31.2 VDC，包括5%的交流纹波。

该模块兼容模拟电流信号范围，如0-20mA和4-20 mA，以及+/-10VDC和0-10VDC输入的电压信号范围。它的电压分辨率为2.56 mV/cnt(单极性)和5.13 mV/cnt(双极性)，电流分辨率为5.13 A/cnt。该模块的最大电压过载为连续30伏，最大电流过载为连续32毫安，但两者只有一个通道。

1794-IE8模块的最大功耗为3 W，散热为10.2 BTU/小时，两者均为31.2伏DC。它在10至500赫兹时的工作振动为5 g。其工作冲击为30克，而非工作冲击为50克。该模块的工作温度范围为-20至55摄氏度，而其储存温度范围为-40至85摄氏度。25摄氏度时，1794-IE8模块的电流输入和电压输入精度均为0.20%满量程，尽管电压输入包括增益、失调、可重复性和非线性误差项。电压端对63%的阶跃响应为9.4毫秒，电流端为18.2毫秒。它在25摄氏度时具有0.2%满量程的绝对精度，电压端的精度漂移为0.00428%满量程/摄氏度，电流端的精度漂移为0.00407%满量程/摄氏度。

1794-IEB

The Allen-Bradley 1794-IE8 is a component module of the Flex I/O product family. This module is an Analog input module, used with Flex I/O communication adapters and terminal bases for implementing Distributed I/O architecture.

Using the module’s Eight (8) single-ended, non-isolated, user configurable channels capable of receiving 0 to 20mA, 4 to 20 mA, +/- 10VDC and 0 to 10 VDC input signals, this module is capable of interfacing instruments such as field transmitters, analog indicating instruments, recorders, process loop controllers and other analog instruments that generates the compatible signal ranges.

This Flex I/O analog input module has a resolution of 12 bits when configured in unipolar mode and 11 bits plus sign for bipolar mode. It uses a successive approximation conversion and save the converted data in data format of eft justified, 16-bit 2s complement. It has a conversion rate 256?s on all channels with absolute accuracy of 0.20% Full Scale @ 25°C and accuracy drift of – 0.00428% Full Scale/°C for Voltage and 0.00407% Full Scale/°C for current input. This module does not require calibration.

The 1794-IE8 requires an external Power supply voltage range of 10.5-31.2VDC with nominal supply voltage of 24VDC. It requires a supply current of 60 mA. It requires use of terminal base for mounting and interfacing to input signal wiring. Compatible terminal bases are 1794-TB2, 1794-TB3, and 1794-TB3S, 1794-TB3T and 1794-TB3TS. Only one terminal base is needed by the module.

This Flex I/O module is compatible with Flex I/O communication adapters such as Ethernet, ControlNet, Remote I/O adapters.

No calibration beyond the factory setting is required for this module. It measures 3.7 x 2.1 x 31.8 inches and can be installed to a DIN rail or directly panel mounted. The 1794-IE8 module can be installed on a 1794-TB2, 1794-TB3S, 1794-TB3ST, 1794-TB3T, or a 1794-TB3 terminal base unit. It also comes with a power and status indicator and has an open-style enclosure. This module has a voltage specification of 24 Volts DC nominal with supply voltage range of 10.5 to 31.2 VDC including 5% AC ripple.

This module is compatible for analog current signal range such as 0-20mA and 4-20 mA and voltage signal range of +/-10VDC and 0-10VDC inputs. It has a voltage resolution of 2.56 mV/cnt (unipolar) and 5.13 mV/cnt (bipolar) and current resolution of 5.13 µA/cnt. This module has a maximum voltage overload of 30 Volts continuous and a maximum current overload of 32 mA continuous, but there is only one channel for each.

The maximum power dissipation of the 1794-IE8 module is 3 W and the thermal dissipation is 10.2 BTU/hour, both at 31.2 Volts DC. It has an operating vibration of 5 g at 10 to 500 Hertz. Its operating shock is 30 g, while its non-operating shock is 50 g. The operating temperature range of this module is -20 to 55 degrees Celsius while its storage temperature range is -40 to 85 degrees Celsius. The 1794-IE8 module has a current input and voltage input accuracies of 0.20% full scale at 25 degrees Celsius for both, although the voltage input includes the gain, off-set, repeatability, and nonlinearity error terms. The step response to 63% is 9.4 milliseconds for the voltage terminal and 18.2 milliseconds for the current terminal. It has an absolute accuracy of 0.2% full scale at 25 degrees Celsius and accuracy drift with a temperature of 0.00428% full scale per degree Celsius for the voltage terminal and 0.00407% full scale per degree Celsius for the current terminal.

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