Product Summary
The Allen-Bradley 1794-IE8 is a high-density Flex I/O analog input module. It provides eight single-ended channels for precise data acquisition. This module interfaces with field transmitters and process loop controllers. It supports current and voltage signals for distributed I/O architectures.
Expert Technical Evaluation & Performance Review
Signal Processing and Conversion Accuracy
The 1794-IE8 uses a successive approximation conversion method. It delivers a 16-bit 2’s complement data format. This module achieves an absolute accuracy of 0.20% full scale @ 25 °C. The voltage terminal shows an accuracy drift of 0.00428% Full Scale/°C. The current terminal drifts by 0.00407% Full Scale/°C. This ensures reliable signal integrity in varying thermal conditions.
Channel Configuration and Resolution Details
This module features eight single-ended, non-isolated input channels. You can configure each channel for voltage or current. The unipolar resolution is 12 bits for precise measurements. The bipolar resolution is 11 bits plus sign. The voltage step size is 2.56 mV/cnt for unipolar signals. The current resolution is 5.13 µA/cnt for accurate loop monitoring.
Environmental Tolerances and Mechanical Durability
The 1794-IE8 operates reliably in harsh industrial environments. Its operating temperature range is 0 to 55 °C. The module withstands vibration of 5g @ 10 to 500 Hz. It tolerates an operating shock of 30 g for robust performance. The storage temperature extends from -40 to 85 °C. This makes it suitable for extreme storage conditions.
Installation and Terminal Base Compatibility
You must install this module on a compatible terminal base. Use the 1794-TB2, 1794-TB3, or 1794-TB3S base units. The 1794-TB3T and 1794-TB3TS bases also work perfectly. The module mounts easily on a standard DIN rail. The wire size depends on the selected terminal base. This flexibility simplifies integration into existing panels.
Power Supply and Electrical Specifications
The module requires an external DC power supply. The nominal voltage is 24V DC for standard operation. The supply range is 10.0 to 31.2V DC including ripple. It draws a FlexBus current of 60 mA for communication. The maximum power dissipation is 3.0W at 31.2 Volts DC. This ensures efficient thermal management within the enclosure.
Logistics & Standard Packaging Details
- One (1) Allen-Bradley 1794-IE8 Flex I/O Analog Input Module
- No terminal base or communication adapter is included
- Product ships in an anti-static protective package
- We provide express delivery shipping via FedEx, UPS, and DHL
