The Allen-Bradley 1746-IO8 is a combination input/output module designed for the SLC 500 programmable logic controller system. This module provides a space-efficient solution for applications requiring a mix of digital inputs and relay outputs within a single slot of the SLC 500 chassis. It features 4 AC input channels and 4 relay output channels, making it suitable for interfacing with various field devices such as sensors, switches, and actuators.
Features
Integrated I/O: Combines 4 inputs and 4 relay outputs in a single module.
Compatibility: Designed specifically for the Allen-Bradley SLC 500 platform.
Signal Handling: Supports AC voltage operation for industrial control environments.
Reliable Switching: Integrated relay outputs provide isolation and high-current switching capability for field loads.
Technical Specifications
Product Model
1746-IO8
Module Type
Combination Input/Output
Operating Voltage
85-132V AC
Number of Inputs
4
Number of Outputs
4 (Relay)
Signal Delay
35-45 ms
Output Current (24V DC)
1.2 A
Manufacturer
Allen-Bradley
Installation Guidelines
Power Down: Always disconnect power from the SLC 500 chassis before inserting or removing any I/O module to prevent electrical damage or unexpected system behavior.
ESD Precautions: Handle the module by its edges and avoid touching the backplane connector pins to prevent electrostatic discharge damage.
Mounting: Ensure the module is fully seated in the chassis slot and secured using the top and bottom retaining screws to maintain proper electrical contact and mechanical stability.
Wiring: Use appropriate wire gauges for the terminal blocks and ensure all connections are tight. Route signal cables away from high-voltage power lines to minimize electromagnetic interference (EMI).
Grounding: Ensure the SLC 500 chassis is properly grounded according to local electrical codes to provide a stable reference and noise immunity.
FAQ
Is the 1746-IO8 still in production? No, the 1746-IO8 has been discontinued by the manufacturer. We offer these units as refurbished or surplus spare parts to support legacy systems.
Can I use this module with any SLC 500 processor? The 1746-IO8 is compatible with standard SLC 500 chassis-based systems. Please verify your specific processor and chassis configuration to ensure slot availability and power supply capacity.
