Description
Technical Specifications
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Product Model: 1794-IF8IH
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Brand: Allen-Bradley (Rockwell Automation)
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Warranty: One Year
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Input Voltage: 19.2–31.2 VDC external power supply
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Operating Temperature: 0°C to +55°C
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Storage Temperature: -20°C to +70°C
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Response Time: Configurable 4.17Hz–19.6Hz ADC conversion cycle
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Protection Class: IP20 industrial panel mount protection
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Accuracy Class: 16-bit high-resolution analog acquisition, ±0.05% full-scale accuracy
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Output Frequency: N/A (Analog input acquisition module)
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Rated Current Range: 190mA @ 24VDC operating current
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Communication Interface: FlexBus backplane interface, HART pass-through channel
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Supported Protocols: FlexBus, HART 7 industrial protocol
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Overload Capacity: Continuous signal overload protection, 120% power supply surge tolerance
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Dimensions: 138mm × 93mm × 38mm standard FLEX I/O form factor
Product Overview
The Allen-Bradley 1794-IF8IH is an 8-channel isolated HART analog input module belonging to the Rockwell Automation FLEX I/O series, designed for high-precision process data acquisition in distributed industrial control systems. This universal analog input module supports isolated voltage and current signal collection, compatible with standard 4–20mA process transmitters, temperature sensors, and pressure measurement devices. It solves common process industry challenges including analog signal crosstalk, low acquisition accuracy, inability to read HART device diagnostic data, and poor anti-interference performance in complex electromagnetic environments. Featuring independent channel isolation and built-in HART pass-through functionality, it enables real-time process value collection and remote parameter configuration of field smart instruments. This module serves process automation engineers, system integrators, and plant maintenance teams in chemical, water treatment, and manufacturing process control systems.
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