1794-IB16 | Allen-Bradley Flex I/O 16-Point Digital Input Module

Product Overview

The Allen-Bradley 1794-IB16 serves as a high-density discrete interface for the Flex I/O platform. This module monitors 16 independent digital signals from field devices such as limit switches, proximity sensors, and pushbuttons. It utilizes sinking current input logic, making it the industry standard for interfacing with sourcing (PNP) field devices. We provide this component as 100% Brand New and Original, ensuring optimal signal switching and long-term hardware availability for your distributed I/O architecture.

Technical Specifications

The 1794-IB16 features a compact form factor that mounts directly onto a terminal base to establish electrical connections.

Engineering Advantages

• High-Density Signal Management: By packing 16 inputs into a single narrow module, the 1794-IB16 reduces the required DIN rail length. This allows engineers to increase I/O counts in existing control cabinets without expensive structural modifications.

• Low Current Draw Performance: Each input draws a nominal current of only 8 mA. This low power consumption minimizes heat generation within the enclosure, protecting sensitive adjacent analog or communication modules from thermal stress.

• Robust Signal Filtering: The module effectively handles electrical noise through a precise switching threshold. With a minimum on-state voltage of 10V DC and a maximum off-state of 5V DC, it filters out low-level induction noise that often triggers false signals in long cable runs.

• Modular "Hot Swap" Capability: The Flex I/O design permits Removal and Insertion Under Power (RIUP). Maintenance teams replace a faulty 1794-IB16 module by simply snapping it off the terminal base, keeping the rest of the network and power distribution live.

FAQs

• What type of sensor works best with the 1794-IB16?

  Since this is a sinking input module, you should use "sourcing" or PNP-type sensors. The module provides the ground path (sink) for the current coming from the sensor.

• Which terminal bases are compatible with this module?

  The 1794-IB16 fits onto several 1794 terminal bases, including the 1794-TB2, 1794-TB3, and 1794-TB3S. Selection depends on whether you require screw-clamp or spring-clamp terminations.

• Does the module require an external power supply?

  Yes. You must provide 24V DC power to the terminal base to energize the input circuitry and the field-side devices connected to the 1794-IB16.

• How can I verify if an input is active?

  The module features 16 individual yellow status LEDs on the front panel. These illuminate when the corresponding input channel receives a valid "On-State" voltage, facilitating rapid onsite troubleshooting.