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Allen-Bradley 1794-IB16
Allen-Bradley 1794-IB16
Allen-Bradley 1794-IB16
Allen-Bradley 1794-IB16
Allen-Bradley 1794-IB16
Allen-Bradley 1794-IB16
· Product image is representative; revision or series may vary. Contact us to request a specific version.

1794-IB16

Digital Input Module
In Stock
Ships by Saturday, July 25
Fast Shipping Available

Product Information:

The 1794-IB16 is a classic FLEX I/O digital input module from Allen-Bradley, a subsidiary of Rockwell Automation. Primarily used in industrial automation control systems, this module is a key component of distributed I/O systems, efficiently acquiring various field-generated switching signals (such as pushbuttons, limit switches, and proximity switches) and converting them into digital data recognizable by the PLC controller.

The 1794-IB16 features 16 independent 24V DC input channels with a sinking input design. Hardware electrical isolation effectively prevents electromagnetic interference in industrial environments from damaging core control equipment. The module integrates adjustable input filtering time, significantly reducing erroneous signals caused by contact bounce, thereby improving the signal accuracy and anti-interference capability of the entire control system.

Integrating the 1794-IB16 requires a FLEX I/O adapter (such as an EtherNet/IP, ControlNet, or DeviceNet adapter) and dedicated terminal blocks. It employs an innovative modular, tool-free assembly and disassembly design, supporting conditional hot-swapping (RIUP) during system operation. This design not only greatly simplifies field cabling and system expansion, but also significantly reduces equipment maintenance and downtime.


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Technical specifications for 1794-IB16

  • Manufacturer:
    Allen-Bradley
  • Product Category:
    PLC System
  • Spare Part Number:
    1794IB16
  • Estimated shipping dimensions:
    9.4x6.9x9.7cm
  • Weight:
    0.074 kg
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, Fujian, China
  • Number of inputs:
    16, current, sinking
  • On-state voltage, min:
    10V DC
  • On-state voltage, nom:
    31.2V DC
  • On-state current, min:
    2.0 mA
  • On-state current, nom:
    8.0 mA
  • On-state current, max:
    12.0 mA
  • Off-state voltage, max:
    5.0V DC
  • Off-state current, max:
    1.5 mA
  • Nominal input impedance:
    4.6 kΩ
  • Isolation voltage:
    50V (continuous)
  • Flexbus current:
    30 mA @ 5V DC
  • Power dissipation, max:
    6.1 W @ 31.2V DC
  • Thermal dissipation, max:
    20.8 BTU/hr @ 31.2V DC
  • External DC power supply voltage range:
    10...31.2V DC (includes 5% AC ripple)
  • Stock:
    1

Revisions

Revision Part #

Also known as

1794-IB16/A
1794-IB16 Ser A, Series A, Rev A

Alternative Names

1794IB16 1794 IB16 I794-IBI6 1794-1B16 179A-IB16 1794-I816 I79A-18I6 1794-IB8 1794-IB32 1794-IB32K

Information

Overview Manuals Typical Applications Certifications & Standards

Features:

  • Contains 16 digital inputs grouped into a single non-isolated block
  • Engineered strictly for sinking current configurations, meaning it pairs with sourcing (PNP) field devices
  • Requires a compatible 1794 terminal base unit for field wiring, which features a mechanical keyswitch rotated to Position 2
The Allen Bradley 1794-IB16 is a digital input module in the Flex I/O 1794 series. It offers 16 sink inputs, suitable for integration into various control systems. This module operates efficiently at a wide range of voltages, with a minimum operating voltage of 10V DC and a typical nominal voltage of 24V DC. The maximum operating voltage can reach 31.2V DC, enabling it to effectively handle input voltage fluctuations.

A key highlight of this module is its on-current control capability, with a minimum on-current of 2mA, a nominal on-current of 8mA, and a maximum on-current of 12mA, ensuring stable operation in various applications. Furthermore, the module has a maximum shutdown voltage of 5V DC and a shutdown current limit of 1.5mA, ensuring low power consumption when the input signal is inactive.

The 1794-IB16 Allen Bradley Digital Input Module may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Allen Bradley 1794-IB16 Digital Input Module manual(Datasheets), Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
1.Discrete signal aggregation: Acts as a local hub, collecting binary on/off status signals from standard field devices such as pushbuttons, proximity sensors, limit switches, and photoelectric sensors.
2.Distributed network architecture: Connects to various industrial fieldbus networks, including EtherNet/IP, ControlNet, and DeviceNet, via compatible FLEX I/O network adapters.
1.Class I, Zone 2: c-UL-US certified, suitable for Class I, Zone 2, Groups A, B, C, and D hazardous locations in the United States and Canada.
2.ATEX, Zone 2: Compliant with EU Directive 2014/34/EU, suitable for Class II, Group 3 gas atmosphere equipment. Its protection rating is Ex nA IIC T4 Gc (compliant with EN 60079-15).
3.UKEx, Zone 2: Compliant with UK statutory documentation for Zone 2 open programmable controller applications (UKSI 2016 No. 1107).
4.IECEx Certification System: Compliant with global international certification standards, safe for deployment in Zone 2 hazardous areas.
5.c-UL-US Certification: UL certified, compliant with US and Canadian regulatory standards, document number E65584, classified as industrial control equipment.
6.CE Mark: Compliant with EU directives. This includes assessment of programmable controller safety and industrial electromagnetic compatibility immunity standards (EN 61326-1 / EN 61000-6-4) according to EN IEC 61010-2-201.
7.CSA Certification: The process control equipment is certified by the CSA Group testing registration body.
8.RCM and KC Marks: Certified to meet Australian Radio Communications/Electromagnetic Compatibility Standards (RCM) and Korean KC electromagnetic requirements.
9.Marine Certification: Type approval has been obtained from major classification societies such as the American Bureau of Shipping (ABS) and Deutsche Marine (RINA), allowing for use on ships and offshore drilling platforms.
10.Pollution Degree 2: Designed for standard indoor industrial environments, suitable for non-conductive pollution environments.
11.Conformal coating (Type 1794-IB16K): Versions with the suffix "K" comply with stringent environmental standards such as ANSI/ISA-S71.04-1985 (G1, G2 and G3 grades) to prevent chemical corrosion of internal circuit traces.

Technical notes

The Allen-Bradley 1794-IB16 is a 24V DC sinking digital input module for Rockwell Automation's FLEX I/O systems. Key features include 16 independent input channels, a DC operating voltage range of 10–31.2V, and connectivity via a FlexBus backplane to communication adapters such as EtherNet/IP or ControlNet. The module features a modular design with individual terminal blocks (e.g., 1794-TB3), supports RIUP (Remote Injection Power-On) for uninterrupted maintenance, and allows for optional counter mode configuration for channel 16 (bit 15).
  • Product Lifecycle Stage

    Active/Available from OEM

    Moore Automated provides high-quality Allen-Bradley replacement modules and spare parts to support current and legacy automation systems. Our reliable products and rapid delivery help minimize unplanned downtime while providing cost-effective maintenance solutions for continuous industrial operation.

Ask our team:

  • What electrical input specifications determine the operating performance of the 1794-IB16?
    The 1794-IB16 has a nominal input voltage of 24 V DC and an operating voltage range of 10 to 31.2 V DC. Its 16 discrete input channels can connect to standard industrial sensors, switches, and proximity sensors, ensuring accurate signal acquisition under various field conditions.
  • What are the input current characteristics of the 1794-IB16?
    Each channel of the 1794-IB16 requires approximately 7 mA of input current at 24 V DC, providing stable signal recognition and excellent compatibility with industrial-grade DC field devices. Its optimized input impedance ensures reliable operation with a variety of sensors and dry contact switches.
  • What isolation architecture does the 1794-IB16 employ?
    The 1794-IB16 uses non-isolated input channels grouped under a common electrical reference source. This design optimizes module density, minimizing installation space while providing efficient signal acquisition for distributed I/O systems using shared DC power supplies.
  • What communication architecture does the 1794-IB16 use to exchange data with the programmable controller?
    The 1794-IB16 communicates via a compatible 1794 FLEX I/O communication adapter, supporting industrial networks such as EtherNet/IP™, ControlNet®, DeviceNet™, remote I/O, and other FLEX-compatible communication platforms. This architecture enables deterministic data transmission between field inputs and the upper-level control system.
  • What diagnostic functions are integrated into the 1794-IB16 for predictive maintenance?
    The 1794-IB16 provides onboard status LEDs for each of its 16 input channels, allowing maintenance personnel to immediately verify signal status. Additional diagnostic functions provided through the FLEX I/O adapter aid in communication monitoring, module health verification, and rapid fault location.
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Moore Disclaimer: Moore Automated's sales automation equipment and related solutions are intended for industrial automation and business operational efficiency improvement purposes only. Product information, technical parameters, and application cases are for reference only and do not constitute an absolute guarantee of performance for any specific industry, scenario, or final application. Actual equipment performance may vary depending on factors such as the usage environment, system integration method, and maintenance conditions. Users should confirm compatibility and safety based on professional technical assessments. Moore Automated assumes no liability for any direct or indirect losses caused by improper use, modification, or failure to operate according to specifications, to the extent permitted by law.