The Allen-Bradley 1746-ITB16 is a high-performance digital input module designed for the SLC 500 programmable logic controller system. This module features 16 fast-response, sinking DC inputs, engineered to provide reliable signal acquisition in industrial automation environments where rapid state changes must be captured accurately. It operates within a voltage range of 10 to 30 VDC, making it suitable for a variety of 24VDC control applications.
Features
16-point digital DC sinking input configuration.
Fast response circuitry for high-speed signal processing.
Compatible with standard SLC 500 chassis backplanes.
Wide operating voltage range of 10-30 VDC.
Low power consumption with a backplane current load of 85 mA at 5VDC.
Applications
This module is typically used in SLC 500 control systems for high-speed counting, pulse detection, and rapid sensor feedback applications where standard input modules may not provide sufficient response times. It is ideal for machine control, assembly lines, and process monitoring tasks.
Technical Specifications
Product Model
1746-ITB16
Input Type
DC Sinking
Number of Inputs
16
Operating Voltage Range
10-30 VDC
Nominal Input Voltage
24 VDC
Nominal Input Current
8 mA at 24 VDC
Off-state Voltage (Max)
5 VDC
Off-state Current (Max)
1.5 mA
Backplane Current Load
85 mA at 5 VDC
Installation Guidelines
Ensure the SLC 500 chassis power is disconnected before installing or removing the module.
Verify that the module is fully seated in the chassis slot and secured with the top and bottom retaining screws.
Use shielded twisted-pair cabling for input signals to minimize electromagnetic interference (EMI).
Route input signal wiring away from high-voltage AC lines or high-current DC power cables.
Maintain proper ventilation within the control cabinet to ensure the module operates within its specified temperature range.
Handle with care using ESD-safe practices to prevent damage to internal electronic components.
FAQ
What is the primary difference between the 1746-ITB16 and standard input modules?
The 1746-ITB16 is specifically designed as a 'Fast Response' module, meaning it features optimized input filtering to detect and process rapid input transitions faster than standard SLC 500 digital input modules.
Is this module compatible with all SLC 500 chassis?
Yes, the 1746-ITB16 is designed to fit into any standard I/O slot of an Allen-Bradley SLC 500 modular chassis.
