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.
