1794-IE8 Allen Bradley / Rockwell Flex 8 Point Analog Input Module

Allen Bradley 1794-IE8 Flex 8 Point Analog Input Module

The Allen-Bradley 1794-IE8 is a Flex I/O analog input module. It has Eight (8) Voltage / Current single-ended input channels. It receives analog signals such as 0-20 mA, 4-20 mA, +/- 10VDC and 0-10VDC. It is compatible for use with Flex I/O communication adapters and installed to terminal bases such as 1794-TB2, -TB3, -TB3S, -TB3T, -TB3TS.

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.

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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.

1.What is the difference between 1794-IE8 Series A and Series B?

1794-IE8 Series A produces either 2 Volts or 4 mA until the module is configured. 1794-IE8 Series B has an off position for the range selection tables, enabling it to produce 0V or 0mA. Additionally, Series B has a Power-Up bit in Read word, whereas Series A does not.

2.What is this module's power dissipation?

The 1794-IE8 has a power dissipation of around 3.0 Watts at a DC Voltage of 31.2.

3.How many inputs does this module have?

The 1794-IE8 has a total of 8 inputs, all of which are single-ended.

4.What are compatible terminal bases for the 1794-IE8?

Compatible terminal bases are 1794-TB2, 1794-TB3, and 1794-TB3S, 1794-TB3T and 1794-TB3TS.

5.What are the signal types and ranges supported by the 1794-IE8?

This module supports 0-20mA, 4-20mA and 0-10VDC and +/- 10VDC signals.

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