1746-NIO4V Allen-Bradley

1746-NIO4V Allen-Bradley I / O module

Product  Description：

The 1746-NIO4V features two analog input channels and two analog voltage output channels. The inputs are designed to receive signals from various sensors and transmitters, while the outputs are used to drive devices like valves, motor drives, or actuators. Since it is part of the SLC 500 platform, it communicates directly with the SLC processor via the 1746 backplane. The module utilizes 16-bit registers for data, though the actual resolution depends on the specific range selected.

Product Parameters

The performance of the 1746-NIO4V is defined by its precision and power requirements within the SLC chassis.

• Backplane Current Consumption: $55 \text{ mA}$ at $5 \text{ VDC}$ and $115 \text{ mA}$ at $24 \text{ VDC}$.

• Number of Channels: 2 differential inputs and 2 single-ended outputs.

• Input Voltage Range: $-10 \text{ VDC}$ to $+10 \text{ VDC}$.

• Output Voltage Range: $-10 \text{ VDC}$ to $+10 \text{ VDC}$.

• Input Resolution: 14-bit resolution.

• Output Resolution: 14-bit resolution.

• Step Response: $100 \text{ ms}$ for inputs at $95\%$ and $2.5 \text{ ms}$ for outputs.

• Input Impedance: Greater than $1 \text{ M}\Omega$.

• Load Current (Output): Maximum $10 \text{ mA}$.

• Converter Type: Successive approximation for inputs and R-2R Ladder for outputs.

Product Advantages

Choosing the 1746-NIO4V offers several benefits for industrial control systems.

• Space Efficiency: By combining two inputs and two outputs into a single slot, it saves valuable rack space compared to using separate input and output modules.

• Cost-Effective: It reduces the hardware cost for small-scale applications that only require a few analog points.

• Differential Inputs: The differential input design helps in reducing common-mode noise, which is critical for maintaining signal integrity in electrically noisy industrial environments.

• Simplified Integration: It integrates seamlessly with RSLogix 500 programming software, allowing for easy configuration of data formats and scaling.

Important Considerations and Precautions

To ensure long-term reliability and safety, several precautions must be followed.

• Voltage Only: This specific model is designed for voltage signals. If your application requires current loops (4-20 mA), you must use the 1746-NIO4I or use external precision resistors.

• Wiring Separation: Keep analog signal wires separate from high-voltage power lines to prevent electromagnetic interference (EMI). Use shielded twisted-pair cables and ground the shield at one end only.

• Module Placement: Avoid placing the analog module next to high-noise AC modules or heavy-duty contactors within the SLC chassis.

• Power Supply Capacity: Ensure the SLC power supply can handle the $24 \text{ VDC}$ current draw, as this module pulls significantly more from the $24\text{V}$ rail than standard discrete modules.

• Discontinuation Status: The SLC 500 series is largely in "End of Life" or "Discontinued" status by Rockwell Automation. Availability may be limited to refurbished units or surplus stock.

Product Applications

The 1746-NIO4V is commonly found in legacy systems across various industries.

• Variable Frequency Drive (VFD) Control: Providing a $0-10 \text{ VDC}$ speed reference to a motor drive while receiving speed feedback from the drive’s analog output.

• Temperature and Pressure Monitoring: Interfacing with transmitters that output voltage signals to monitor environmental conditions in a process.

• Proportional Valve Positioning: Sending a voltage signal to a hydraulic or pneumatic proportional valve to control flow or pressure precisely.

• Lab Automation: Used in test stands where high-speed discrete control isn't as vital as accurate voltage measurement and generation.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

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