The Allen-Bradley 1746-NIO4I is a high-density combination analog module designed for the SLC 500 PLC platform. This versatile component consolidates both signal acquisition and control output functions into a single chassis slot, making it an ideal choice for space-constrained industrial applications. The module features two universal analog input channels and two dedicated current output channels, allowing engineers to monitor sensors while simultaneously commanding actuators from the same hardware interface.
System designers frequently utilize the 1746-NIO4I to bridge the gap between digital logic and continuous process variables. By supporting multiple signal types and providing high-resolution data conversion, this module ensures precise control over variables such as pressure, temperature, and flow. While Rockwell Automation transitioned the SLC 500 line to legacy status in 2016, the 1746-NIO4I remains a fundamental spare part for maintaining the operational integrity of existing manufacturing and process control systems worldwide.
Technical Specifications
| Feature | Specification Details |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Model Number | 1746-NIO4I |
| Module Type | Combination Analog Input/Output |
| Input Channels | 2 Configurable (Voltage or Current) |
| Output Channels | 2 Dedicated Current (0-20mA or 4-20mA) |
| Backplane Current (5V) | 55 mA |
| Backplane Current (24V) | 115 mA |
| Resolution | 16-bit |
| Isolation | 500V DC (Field to Backplane) |
| Dimensions | 3.5 cm x 13.0 cm x 14.5 cm |
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