Allen-Bradley 1794-IE8 Flex I/O 8-Channel Analog Input Module

Product Description

The Allen-Bradley 1794-IE8 is an analog input module from the Flex I/O series, engineered to provide eight single-ended, non-isolated input channels for precise signal acquisition. With 12-bit resolution in unipolar mode and 11-bit plus sign in bipolar mode, it ensures accurate data conversion for industrial automation systems. The module features successive approximation conversion, fast update rates, and integrated diagnostics, making it suitable for demanding process control environments.

Key Features

• Manufacturer: Rockwell Automation

• Brand: Allen-Bradley

• Model Number: 1794-IE8

• Series: Flex I/O

• Type: Analog Input Module

• Number of Inputs: 8 single-ended, non-isolated channels

• Resolution:

• 12-bit unipolar

• 11-bit plus sign bipolar

• Data Format: Left-justified, 16-bit two’s complement

• Conversion Type: Successive approximation

• Conversion Rate: 256 µs for all channels

• Maximum Overload Protection: 30 V continuous or 32 mA continuous (one channel at a time)

• Indicators: 1 green power LED

• Module Location: Compatible with 1794-TB2, -TB3, -TB3S, -TB3T, -TB3TS terminal base units

• Isolation Voltage: Tested at 850 VDC for 1 second (user power to system); no isolation between channels

• Power Dissipation: 3.0 W max @ 31.2 VDC

• Thermal Dissipation: 10.2 BTU/hr max @ 31.2 VDC

• Flexbus Current Draw: 20 mA

• Dimensions: 5.4 cm × 9.4 cm × 4.57 cm

• Weight: 2 kg

Application Scenarios

• Process Control Systems: Accurate analog signal acquisition for monitoring and control

• Industrial Automation: Integration into Flex I/O racks for scalable distributed systems

• Safety-Critical Environments: Overload protection ensures reliable operation under fault conditions

• Compact Installations: Slim design allows efficient use of panel space

FAQ

Q: How many input channels does the 1794-IE8 provide?  A: It supports 8 single-ended, non-isolated analog inputs.

Q: What resolution does the module offer?  A: 12-bit resolution in unipolar mode and 11-bit plus sign in bipolar mode.

Q: What terminal bases are compatible?  A: 1794-TB2, -TB3, -TB3S, -TB3T, and -TB3TS.

Q: How does it compare to the 1794-IE4XOE2 module?  A: The 1794-IE8 provides 8 analog inputs only, while the 1794-IE4XOE2 combines 4 analog inputs with 2 analog outputs, offering mixed functionality.