Overview
The Allen-Bradley 1746-NI4 is a high-resolution analog input module designed for the SLC 500 family of programmable logic controllers. This module is a 4-channel analog input module designed for use with the SLC 500 system from Allen-Bradley / Rockwell Automation. It provides precision analog signal conditioning for applications requiring accurate voltage and current measurement in industrial environments.
Key Features
- 16-bit resolution for accurate signal conversion utilizing Sigma-Delta technology
- Supports various input types, including voltage and current signals, making it versatile for different applications
- Non-linearity of 0.01% ±0.073% of full scale
- 4 analog inputs with a backplane current (5 volts) of 25 milliamps
- Equipped with features to minimize electrical noise, which is critical for maintaining signal integrity in industrial environments
- Voltage input impedance rated at 1 megaohm and nominal current input impedance of 250 ohms
Technical Specifications
- Input Channels: 4 analog inputs
- Input Range: ±10V DC and ±20mA
- Resolution: 16-bit
- Converter Method: Sigma-Delta
- Non-linearity: 0.01% ±0.073% of full scale
- Step Response: 60 milliseconds
- Backplane Current Draw (5V): 25 milliamps
- Backplane Current Draw (24V): 85 mA at 24V DC
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
- Bandwidth: 10 Hertz
- Update Time: 512 microseconds
- Input Configuration: 4 Differential channels
- Mounting Style: Rack Mount
- Weight: 0.51 lbs
Typical Applications
- Precision temperature measurement and control loops
- Pressure and flow monitoring in industrial processes
- Data acquisition for analog sensor inputs in SLC 500 systems
- Level sensing and tank monitoring applications
- Proportional valve control feedback and diagnostics
- Energy monitoring and metering systems
Compatibility & Replacements
Compatible With
- Allen-Bradley SLC 500 compact and modular controllers
- SLC 500 fixed hardware style systems
- SLC 500 modular hardware style systems
- RSLogix 500 programming environment
Replaces / Drop-In Replacement For
The 1746-NI4 is a legacy product. Verify compatibility with your system integrator before ordering for exact replacement applications.
Works With
- RSLogix 500 (Rockwell Automation programming software)
- Connected Components Workbench
- SLC 500 I/O image configuration
- Differential input configurations for noise-sensitive environments
