Description
Product Name: 1746-NI161 Allen Braley Central control module
Product details:
The Allen-Bradley 1746-NI16I (often typed as NI16I) is a high-density analog input module designed for the SLC 500 modular hardware platform. It is specifically engineered to interface with current-loop transducers, providing high-resolution data for process control.
1. Product Overview
The 1746-NI16I is an isolated, 16-channel analog input module. It converts analog current signals into digital values that the SLC 500 processor can utilize. Its “high-density” design allows for 16 separate inputs while occupying only a single slot in the 1746 chassis, making it an efficient choice for large-scale I/O requirements.
2. Technical Specifications
Below are the core technical parameters for the 1746-NI16I:
| Feature | Specification |
| Number of Inputs | 16 Channels (Isolated) |
| Input Type | Current (Current Loop) |
| Input Range | 0 to 20 mA or 4 to 20 mA |
| Resolution | 16-bit |
| Backplane Current (5V DC) | 125 mA |
| Backplane Current (24V DC) | 75 mA |
| Isolation | 500V DC (between inputs and backplane) |
| Bandwidth | 10 Hz to 1 kHz (Selectable) |
| Terminal Block | 1746-RT25G (Removable) |
3. Key Advantages
- Space Efficiency: Provides 16 channels in a single slot, significantly reducing the physical footprint of the PLC system.
- High Precision: With 16-bit resolution, it can detect minute changes in process variables, ensuring high accuracy for sensitive industrial applications.
- Configurability: Users can configure digital filters and scaling via the programming software (RSLogix 500), allowing for noise reduction tailored to the specific environment.
- Module Status LEDs: Features a “Module Status” LED on the front panel to provide immediate visual diagnostics regarding the health of the hardware.
4. Usage Considerations & Safety
Important: Always remove power from the SLC 500 chassis before installing or removing modules to prevent equipment damage or electrical shock.
- Shielding: Use shielded twisted-pair cabling for all analog signals. Ensure the shield is grounded only at one end (typically the chassis ground) to avoid ground loops.
- Channel Isolation: While the module provides isolation between the inputs and the backplane, ensure your field devices share a compatible common reference if necessary.
- Current Limitation: Do not exceed the maximum input current rating (typically 30mA). Overcurrent can damage the internal precision resistors.
- Heat Dissipation: Due to the high density of 16 channels, ensure the control cabinet has adequate ventilation to maintain the operating temperature within the specified range (0^\circC to 60^\circC).
5. Typical Applications
The 1746-NI16I is widely used in industries requiring heavy monitoring of continuous variables, including:
- Water Treatment: Monitoring flow meters, pressure sensors, and pH levels throughout a facility.
- Oil & Gas: Tracking tank levels and pipeline pressures across vast distances.
- Chemical Processing: Precise temperature and current monitoring for reaction vessels.
- HVAC Systems: Integrating large numbers of air quality and temperature sensors into a central control logic.
Advantages: Foxboro, OVATION, TRICONEX, Allen-Bradley, ABB, Motorola, Siemens Moore, Ge Fanuc, Woodward, Bently Nevada and other major import brands!
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Colour：new Warranty: 12 months
Lead Time：3-day working day Country of origin: Sweden
Price: Please contact us Product weight：0.515kg
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
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Service: Professional Sales provides 24 hours /7 days online service
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