1746sc-INI4i

Overview of Allen-Bradley 1746SC-INI4I 4-Channel Isolated Analog Input Module

The Allen-Bradley 1746SC-INI4I is a 4-channel isolated analog current input module designed for SLC 500 programmable controllers. It provides individually isolated inputs for accurate and reliable analog signal acquisition in industrial control systems, supporting current inputs of 0-20 mA and 4-20 mA ranges. The module is suitable for noisy environments and offers high accuracy and versatile filtering options.

Key Features of 1746SC-INI4I

• Four isolated analog current input channels for precise signal measurement.
• Supported input ranges: 0-20 mA, 4-20 mA.
• 16-bit resolution with 312.8 nA per count accuracy.
• Four selectable filter frequencies for optimal noise rejection and fastest update times.
• Individual channel programmability via ladder register settings or RSLogix software.
• On-board ambient temperature compensation for performance consistency.
• Electrical isolation: 125 VAC continuous between field wiring and backplane, and channel-to-channel isolation.
• Input impedance: Less than 250 ohms for current inputs.
• Update times as fast as 14 ms for current inputs (with 500 Hz filtering).
• Robust design for harsh industrial environments with operation temperature 0 to 60°C.
• Backplane current draw: 440 mA at 5 V (typical), 0 mA at 24 V.

Technical Specifications

Applications / Use Cases

This module is ideal for acquiring isolated analog current signals in process control and industrial automation applications. Its isolation and precise filtering make it suitable for use in electrically noisy environments requiring stable and accurate analog data.