The Allen-Bradley 1746-NO8I is an 8-point analog current output module designed for the SLC 500 programmable logic controller (PLC) system. This module provides high-precision control for industrial applications requiring current-based signaling, such as proportional valves, variable frequency drives, and other process control instrumentation. It serves as a critical interface between the SLC 500 processor and field devices, ensuring reliable signal conversion and output.
Features
Provides 8 isolated current output channels.
Compatible with the Allen-Bradley SLC 500 modular chassis system.
Supports standard 4-20 mA current loops for industrial process control.
High-resolution output for accurate process regulation.
Designed for integration into existing SLC 500 rack configurations.
Applications
This module is widely used in industrial automation environments, including:
Process control systems for manufacturing and chemical plants.
Control of actuators and positioners in motion control applications.
Integration with variable speed drives and industrial instrumentation.
Data acquisition and control systems requiring analog output signals.
Technical Specifications
Manufacturer
Allen-Bradley
Model Number
1746-NO8I
Module Type
Analog Current Output
Number of Outputs
8
Output Range
4-20 mA
System Compatibility
SLC 500
Weight
0.4 kg
Installation Guidelines
Ensure the SLC 500 chassis power is disconnected before installing or removing the module.
Slide the module into the desired slot in the SLC 500 chassis and secure it using the integrated locking mechanism.
Use shielded twisted-pair cabling for analog signals to minimize electromagnetic interference (EMI).
Ensure proper grounding of the cable shields at the control cabinet end to prevent ground loops.
Verify that the current loop polarity is correct before energizing the system.
Keep signal wiring separated from high-voltage power lines to maintain signal integrity.
FAQ
What is the primary function of the 1746-NO8I?
The 1746-NO8I is an analog output module that converts digital data from the SLC 500 processor into 8 independent 4-20 mA current signals for controlling field devices.
Is this module compatible with all SLC 500 chassis?
The 1746-NO8I is designed for standard SLC 500 I/O chassis. Please verify your specific chassis power supply capacity to ensure it can support the additional load of the module.
How should I handle the module to prevent damage?
This module contains sensitive electronic components. Always handle it by the edges, avoid touching the backplane connectors, and use proper ESD (electrostatic discharge) protection during installation.
