The Allen-Bradley 1746-NI4 is a 4-channel analog input module from the SLC 500 series that supports user-selectable voltage or current inputs. It features 16-bit resolution and is suitable for process control applications involving parameters such as flow and temperature.
Key Specifications
Parameter
Specification
Manufacturer
Allen-Bradley (Rockwell Automation)
Product Family
SLC 500
Number of Inputs
4 differential channels
Input Type
Analog, user-selectable for voltage or current per channel
Input Voltage Range
±10V DC
Input Current Range
±20 mA (nominal), ±30 mA (maximum)
Resolution
16-bit
Backplane Current
25 mA @ 5V DC; 85 mA @ 24V DC
Update Time
512 microseconds
Isolation
500V DC field wiring to backplane
Features
Removable terminal block, DIP switches for configuration
Features and Applications
User-Selectable Inputs: Each of the four channels can be independently configured as either a voltage or current input using DIP switches on the circuit board, providing flexibility for various monitoring and control applications.
High Resolution and Noise Immunity: The module offers 16-bit resolution and superior input filtering, which helps in reducing electrical noise interference in industrial environments.
Ease of Use: Installation involves simply slotting it into the SLC 500 chassis. The use of a removable terminal block allows for quick module replacement without having to remove the wiring.
Robust Construction: The module features a robust industrial design that is built to withstand tough plant conditions, ensuring reliable and accurate signal processing.
Typical Applications: The 1746-NI4 is well-suited for process control tasks involving slowly changing analog signals, such as monitoring flow, temperature, and pressure.
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