Product Overview

The 1794-IB16 is a high-density digital input module from the Allen-Bradley FLEX I/O™ family, engineered to interface field sensors with industrial controllers. This module features 16 non-isolated sink-style inputs, specifically designed to detect 24V DC discrete signals from devices such as limit switches, proximity sensors, and pushbuttons. By utilizing a modular "slide-and-plug" architecture, the 1794-IB16 allows for the maintenance of individual I/O components without disturbing existing field wiring, significantly reducing system downtime.

As a core component of decentralized automation, the 1794-IB16 offloads wiring from the main PLC chassis to the machine level. It is compatible with various FLEX I/O terminal bases and communication adapters (including EtherNet/IP, ControlNet, and DeviceNet), providing a scalable solution for high-performance signal handling in both standard and SIL2 safety-rated applications.

Technical Characteristics

• Input Density: 16 Digital Inputs (Sinking configuration).

• Nominal Voltage: 24V DC (Input range of 10V DC to 31.2V DC).

• Input Style: Sink (Current flows from the input device into the module).

• On-State Current: 2.0 mA minimum at 10V DC; 12.0 mA maximum at 31.2V DC.

• Off-State Voltage: 5.0V DC maximum.

• Safety Certification: SIL2 capable for use in safety-instrumented systems.

• Filter Time: User-configurable input filtering to eliminate electrical noise and contact bounce.

• Backplane Current: Draws 30 mA at 5V DC from the communication adapter.

• Terminal Base Compatibility: Designed for use with 1794-TB2, 1794-TB3, 1794-TB3S, and other FLEX I/O bases.

• Environmental Range: Operating temperature from -20°C to +60°C (-4°F to +140°F).

• Dimensions: 9.3 x 5.0 x 5.4 cm.

• Weight: 0.1 kg.

Installation and Industrial Reliability

The 1794-IB16 is optimized for space-constrained control cabinets, offering a small footprint without sacrificing ruggedness. Its digital circuitry is protected against industrial transients, ensuring that high-speed signal processing remains accurate in environments with heavy motor noise or electromagnetic interference.

Integration into the Rockwell Automation ecosystem is seamless through Studio 5000 or RSLogix software, where engineers can define input delay times to match specific application requirements. Whether deployed in automotive assembly, material handling, or food and beverage processing, the 1794-IB16 provides the deterministic data acquisition necessary for real-time logic execution. Its robust design and global certifications make it a reliable choice for both domestic USA projects and international industrial installations.