Rockwell / Allen-Bradley 1746sc-NI8u 8 Universal Analog Inputs I/O Module

The Rockwell / Allen-Bradley 1746SC-NI8U is an 8-channel universal analog input module for SLC 500 controllers. It acquires voltage and current signals across multiple ranges with 16-bit resolution and ±0.1% accuracy, delivering scaled engineering units or raw count data. Each channel configures independently for signal type and range, with integrated scaling, channel-to-backplane isolation, and built-in diagnostics for open-circuit and short-circuit detection.

Technical Specifications

• Channels: 8 single-ended


• Input Signal Types: 0–5 VDC, 0–10 VDC, ±5 VDC, ±10 VDC, 0–20 mA, 4–20 mA


• Resolution: 16-bit


• Accuracy: ±0.1% of full scale (typical)


• Input Impedance: 1 MΩ (voltage, typical); 250 Ω (current, typical)


• Backplane Current Draw: 120 mA @ 5 VDC (typical)


• Power Consumption: 0.6 W (typical)

Key Features

• Individual channel configuration for signal type and range


• User-defined on-board scaling for engineering units


• Channel-to-backplane isolation


• LED status indicators for module health and I/O status


• Removable terminal block for field wiring


• Fault reporting to SLC 500 controller

Typical Applications

• Process control for temperature, pressure, flow, and level monitoring


• High-resolution analog sensor data acquisition and trending


• Machine monitoring with vibration sensors and load cells


• Environmental monitoring from analog sensors

Compatibility & Integration Designed for Allen-Bradley SLC 500 controllers and standard 1746 series I/O chassis. Module interfaces via SLC 500 backplane connector.