Description
Allen-Bradley 1746-NI4 Analog Input Module
The Allen-Bradley 1746-NI4 delivers precision analog measurement for your SLC 500 system. This versatile 4-channel module accepts both voltage and current signals with excellent 16-bit resolution. Perfect for process monitoring and control applications requiring accurate data acquisition.
Key Technical Specifications
- Brand & Manufacturer: Allen-Bradley / Rockwell Automation
- Model: 1746-NI4 (SLC 500 Series)
- Module Type: Analog Input Module
- Number of Channels: 4 differential non-isolated inputs
- Input Types: User-selectable voltage or current per channel
- Voltage Range: -10 to +10V DC
- Current Range: -20 to +20mA (nominal), -30 to +30mA (maximum)
- Resolution: 16-bit (65,535 counts)
- Update Time: 512 microseconds
- Accuracy (@25°C): ±0.284% FS (voltage), ±0.365% FS (current)
- Non-linearity: 0.01% maximum
- Repeatability: ±1 LSB
- Input Impedance: 1 MΩ (voltage), 250Ω (current)
- Backplane Current: 35mA @ 5V DC, 85mA @ 24V DC
- Bandwidth: 10 Hz
- Operating Temperature: 0° to 60° C (32° to 140° F)
- Conversion Method: Delta-Sigma modulation
- Connection: Removable terminal block
Installation Guide
- Install in any SLC 500 slot except slot 0
- Use DIP switches to select voltage or current per channel
- Connect signals using differential wiring
- Use recommended cable lengths: 0.5, 1, 2.5, or 5.0 meters
- Avoid connecting voltage sources to current-configured channels
- Check LED indicators for channel status monitoring
Warranty Coverage
- 12-month warranty included
- Comprehensive coverage for defects
- Quick technical support response
- Simple warranty claim process
Frequently Asked Questions
- Q: Can I mix voltage and current inputs on the same module?
A: Yes, each channel independently selects between voltage or current input using DIP switches. - Q: What is the maximum signal cable length recommended?
A: The 1746-NI4 works best with cable lengths of 0.5, 1, 2.5, or 5.0 meters for optimal performance. - Q: How does the 16-bit resolution benefit my application?
A: 16-bit resolution provides high measurement precision with 65,535 discrete values across your signal range. - Q: What happens if I connect a voltage signal to a current-configured channel?
A: This may cause incorrect operation or damage to the module – always verify channel configuration before connecting signals. - Q: Can I use this module with both positive and negative signals?
A: Yes, the module accepts bipolar signals from -10V to +10V and -20mA to +20mA.
Download User Manual
- Complete installation instructions available
- Detailed wiring diagrams included
- Configuration and programming guidance
- Download here: SLC 500 Hardware Manual
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