Product Introduction
With a 16-bit resolution and four isolated analog input channels, the Allen-Bradley 1794-IF4I Flex I/O Isolated Input Analog Module provides precise measurement for voltage and current signals. This module is part of the Flex I/O family and supports a wide range of input types including 0-20 mA, 4-20 mA, ±20 mA, ±10 VDC, 0-10 VDC, ±5 VDC, and 0-5 VDC, all user-configurable. It operates on a nominal 24 VDC external supply and features a sigma-delta conversion type for accurate data acquisition.
Technical Specifications Breakdown
Key specifications of the Allen-Bradley 1794-IF4I ensure reliable performance in demanding industrial environments:
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Inputs: 4 isolated channels
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Resolution: 16 bits unipolar; 15 bits plus sign bipolar
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Input Signal Types: 0-20 mA, 4-20 mA, ±20 mA, ±10 VDC, 0-10 VDC, ±5 VDC, 0-5 VDC
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External DC Supply: 24 VDC nominal, range 19.0–31.2 VDC (including 5% AC ripple)
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FlexBus Current: 50 mA
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Power Dissipation: 2.0 W maximum at 31.2 VDC
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Thermal Dissipation: 6.8 BTU/hour maximum at 31.2 VDC
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Isolation Voltage: 120 V continuous (depends on terminal base)
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Operating Temperature: 0 to 55°C (32 to 131°F)
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Storage Temperature: –40 to 85°C (–40 to 185°F)
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Vibration: 5g at 10–500 Hz
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Operating Shock: 30g
These specs make the 1794-IF4I suitable for high-accuracy analog input applications in control systems.
Industry Applications
The Allen-Bradley 1794-IF4I is ideal for process control, manufacturing automation, and monitoring systems that require isolated analog measurements. Examples include:
- Monitoring pressure transmitters and flow meters using 4-20 mA loops.
- Reading temperature sensors with voltage output signals.
- Acquiring variable-speed drive feedback signals with high resolution.
Its isolated channels reduce noise and protect sensitive electronics from ground loops.
Installation & Setup
The 1794-IF4I mounts easily on a DIN rail and is compatible with terminal bases such as 1794-TB2, 1794-TB3, 1794-TB3S, and 1794-TBN. Wire size is determined by the installed base. Ensure the external 24 VDC supply is within the specified range. The module includes a bi-colored OK LED for status indication: green for normal operation (or power-up), red for hardware failure.
Compatibility & Integration
The Allen-Bradley 1794-IF4I integrates seamlessly with Flex I/O systems and communicates via the FlexBus backplane. It works with Rockwell Automation controllers and supports various terminal bases for wiring flexibility. Always verify compatibility with your existing I/O architecture.
Selection Guide & Purchasing Advice
Before purchasing the 1794-IF4I, consider the required terminal base, external power supply, and input signal types. For expert advice and availability, contact UBEST Automation at ubest101. Our inventory ensures fast delivery for your automation spare parts needs.