Allen-Bradley | 1794-IE8 | FLEX I/O (1794 Series)

Product Description: Allen-Bradley 1794-IE8

The Allen-Bradley 1794-IE8 is an 8-channel analog input module designed for the FLEX I/O system. It supports current input signals ranging from 0–20 mA or 4–20 mA, making it suitable for interfacing with a wide variety of industrial sensors and transmitters. Compact and scalable, the module is ideal for distributed analog signal acquisition in process control and manufacturing environments.

Key Features

• 8 single-ended analog current input channels
• Supports standard 0–20 mA and 4–20 mA input ranges
• 12-bit resolution for accurate signal conversion
• Channel status indicators for diagnostics
• Compatible with FLEX I/O terminal bases and adapters
• Compact DIN-rail mounting with flexible system integration
• Software-configurable scaling and alarms via controller

Technical Specifications

• Input Signal Range: 0–20 mA or 4–20 mA
• Number of Channels: 8
• Resolution: 12 bits
• Input Impedance: 250 ohms
• Accuracy: ±0.1% full scale (typical)
• Update Rate: 2 ms per channel
• Isolation Voltage: 250V (field-to-backplane)
• Backplane Current: 30 mA @ 5V DC
• Power Dissipation: 1.0 W
• Operating Temperature: 0°C to 55°C
• Mounting: DIN rail with appropriate FLEX terminal base (e.g., 1794-TB3)
• Certifications: UL Listed, CE, CSA, RoHS, Class I Div 2

Application Areas

• Process automation requiring current loop signal acquisition
• Distributed I/O systems in oil & gas, chemical, and food industries
• OEM machines using analog instrumentation
• Environmental and building management systems
• SCADA and PLC-based analog monitoring

Advantages

• High channel count reduces hardware cost per point
• Standard industrial signal compatibility (4–20 mA)
• Accurate and reliable analog input measurement
• Compact design ideal for distributed control architectures
• Seamless integration with Allen-Bradley controllers and software