The Allen-Bradley 1746-NI04I is a high-resolution combination analog I/O module designed for the SLC 500 programmable logic controller system. This module provides versatile signal processing capabilities by integrating two analog input channels and two analog current output channels into a single, compact unit. It is engineered for industrial environments requiring precise analog signal control and monitoring.
Two analog input channels supporting selectable ranges of +/- 10V DC or +/- 20 mA.
Two analog current output channels providing 0-20 mA output signals.
High-resolution performance for demanding process control applications.
Designed for seamless integration with the SLC 500 chassis backplane.
Applications
The 1746-NI04I is commonly utilized in industrial automation systems for tasks such as proportional valve control, motor speed regulation, and monitoring of analog sensors (pressure, temperature, or flow). It is suitable for factory floor automation, process instrumentation, and legacy system maintenance.
Technical Specifications
Manufacturer
Allen-Bradley
Model
1746-NI04I
Module Type
Analog Input/Output
Input Channels
2 (Voltage or Current)
Output Channels
2 (Current)
Voltage Rating
24 VDC
Status
Discontinued by Manufacturer (2018)
Installation Guidelines
Ensure power is removed from the SLC 500 chassis before inserting or removing the module to prevent electrical damage.
Verify that the module is properly seated in the chassis slot and secured with the retaining screws.
Use shielded twisted-pair cabling for all analog signal connections to minimize electromagnetic interference (EMI).
Ensure proper grounding of the cable shields at the signal source or the cabinet ground bus, avoiding ground loops.
Maintain adequate clearance around the module to facilitate proper airflow and cooling within the enclosure.
FAQ
Is the 1746-NI04I still being manufactured?
No, the manufacturer officially discontinued this module in 2018. We provide high-quality surplus units to support legacy systems.
Can this module handle both voltage and current inputs?
Yes, the two input channels are configurable to accept either +/- 10V DC or +/- 20 mA signals, providing flexibility for various sensor types.
