The Allen-Bradley 1746SC-IA8I is a high-performance isolated digital input module designed for use with the SLC 500 programmable logic controller platform. Manufactured by Spectrum Controls, this module provides eight individually isolated 100/120V AC/DC digital inputs, ensuring robust signal integrity and protection against ground loops in complex industrial control environments. It is engineered to integrate seamlessly into existing SLC 500 chassis configurations.
Features
8 individually isolated input points, providing 1 point per common for maximum flexibility.
Compatible with 100/120V AC/DC signal levels.
Designed specifically for the Allen-Bradley SLC 500 system architecture.
High-density I/O design to optimize rack space.
Robust isolation to mitigate electrical noise and interference.
Applications
This module is ideal for industrial automation applications where electrical isolation between input channels is required to prevent cross-talk or ground-related faults. Common use cases include monitoring AC/DC sensors, limit switches, and push-button signals in manufacturing lines, power distribution panels, and process control systems.
Technical Specifications
Model
1746SC-IA8I
Input Type
Isolated Digital Input
Number of Inputs
8
Voltage Rating
100/120V AC/DC
Nominal Input Current
16 mA @ 120V AC
Max Off-state Current
4 mA @ 20V AC
Max Power Dissipation
4 W
Manufacturer
Allen-Bradley / Spectrum Controls
Installation Guidelines
Ensure the SLC 500 chassis power is disconnected before installing or removing the module.
Handle the module using ESD-safe practices to prevent damage to internal electronic components.
Seat the module firmly into the designated slot in the SLC 500 chassis and secure it using the integrated locking mechanism.
Ensure that field wiring is properly shielded and routed away from high-voltage AC lines to minimize EMI.
Verify that the common connections for each isolated input are correctly wired according to the specific application requirements.
FAQ
Is the 1746SC-IA8I compatible with standard SLC 500 racks?
Yes, this module is designed to be fully compatible with the standard Allen-Bradley SLC 500 chassis backplane.
Does this module require external power for the inputs?
The module receives its backplane power from the SLC 500 chassis, but the input signals themselves must be powered by an external 100/120V AC/DC source.
