1791DS-IB16 | Allen Bradley | CompactBlock Guard I/O Safety Input Module

Product Overview

The Allen Bradley 1791DS-IB16 functions as a high-integrity safety input module within the CompactBlock™ Guard I/O™ family. This module interfaces directly with DeviceNet™ Safety networks, providing 16 dedicated safety inputs for monitoring critical field devices such as E-stop buttons, light curtains, and safety gates. It distributes safety-rated digital input data to GuardLogix® or SmartGuard™ controllers. We supply this unit as 100% brand new and original, ensuring your safety circuits comply with the highest SIL and Cat. performance ratings.

Technical Specifications

The 1791DS-IB16 utilizes a specialized hardware architecture to execute safety-critical logic:

Engineering Advantages

• SIL 3 / PLe Rated Monitoring: The 1791DS-IB16 supports safety applications up to SIL 3 (IEC 61508) and PLe (ISO 13849-1). This allows for integration into high-risk machinery zones where functional safety is a mechanical and legal requirement.

• DeviceNet Safety Integration: The module utilizes the CIP Safety™ protocol over DeviceNet. This enables the transmission of safety and standard control data over a single wire pair, significantly reducing wiring complexity and material costs in distributed safety architectures.

• On-Board Pulse Testing: The module generates test pulses to detect short circuits to external power sources or adjacent channels. This self-diagnostic capability ensures the system identifies wiring faults before they compromise the safety function.

• Compact Block Form Factor: The space-saving design fits into shallow control cabinets. The integrated terminal blocks allow for direct field-device termination, eliminating the need for interposing terminal strips and simplifying the troubleshooting process.

• Flexible Input Configuration: Engineers configure the 16 inputs as individual single-channel points or as 8 dual-channel pairs for applications requiring redundant safety monitoring.

FAQs

• Does the 1791DS-IB16 require a safety controller?

  Yes. This module acts as a remote safety I/O device. It must communicate with a safety master, such as an Allen Bradley GuardLogix controller or a SmartGuard 600 controller, via a DeviceNet Safety network.

• Is this product a brand new Allen Bradley original?

  Absolutely. We guarantee that every 1791DS-IB16 unit we ship is 100% brand new in original factory-sealed packaging. Each module meets the strict E-E-A-T industrial procurement standards.

• What is the significance of the 11V DC On-State voltage?

  The 11V DC threshold defines the minimum voltage the module recognizes as a "High" signal. This specific tolerance ensures stable operation in environments with potential voltage sags, preventing nuisance safety trips.

• Can I monitor dual-channel light curtains with this module?

  Yes. You can pair the inputs in the software configuration to support dual-channel safety devices. This configuration allows the module to perform cross-channel monitoring to detect discrepancies between the two signals.