The Allen-Bradley 1746-IB16 is a 16-channel digital input module engineered for the SLC 500 control platform. This module provides a compact, single-slot solution for monitoring 24V DC field devices, including proximity sensors, pushbuttons, and limit switches. Designed for current-sinking applications, it integrates seamlessly into SLC 500 chassis systems.
Features
Sixteen (16) current-sinking input channels
Nominal input voltage of 24V DC (operating range 10-30V DC)
Optimized for low backplane power consumption (50 mA at 5V DC)
Integrated hardware filtering providing an 8 ms signal delay for both ON and OFF transitions to mitigate noise
Includes a removable terminal block for simplified field wiring and maintenance
Technical Specifications
Brand
Allen-Bradley
Product Series
SLC 500
Module Type
Digital DC Input
Input Count
16 (Sinking)
Operating Voltage
24V DC (10-30V DC range)
Signal Delay
8 ms (ON/OFF)
Backplane Current (5V)
50 mA
Backplane Current (24V)
0 A
Heat Dissipation
3.6 Watts total
Operating Temperature
0 to 60 degC
Installation Guidelines
Ensure the SLC 500 chassis power is disconnected before installing or removing the module.
Seat the module firmly into the chassis slot and secure it using the top and bottom mounting screws to ensure proper backplane connection.
Use the included removable terminal block for wiring; ensure all field wires are properly stripped and secured to prevent intermittent signals.
Maintain proper spacing for ventilation to ensure the module operates within the specified 0 to 60 degC temperature range.
Route signal wiring away from high-voltage AC lines and high-EMI sources to maintain signal integrity.
FAQ
Is this module compatible with all SLC 500 chassis?
Yes, the 1746-IB16 is designed for standard SLC 500 I/O chassis, occupying a single slot.
Does this module require 24V power from the backplane?
No, this module does not draw 24V current from the backplane; it only requires 50 mA from the 5V DC backplane supply.
Can I use this module for current-sourcing devices?
No, the 1746-IB16 is specifically a current-sinking input module. Ensure your field devices are configured for sinking operation.
