1791DS-IB16 | Allen-Bradley | 16-Input DeviceNet Safety Module

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

Product Overview

The 1791DS-IB16 is a high-performance, distributed safety input module from the Allen-Bradley CompactBlock Guard I/O family. Engineered for mission-critical safety applications, this module interfaces with the DeviceNet network using the CIP Safety protocol. It provides 16 safety-rated sinking inputs and 16 pulse test outputs, designed to detect short circuits in field wiring. Unlike standard I/O, the 1791DS-IB16 features a redundant internal architecture to meet high safety integrity levels (SIL 3 and PLe), making it essential for guarding personnel and equipment in automated environments.

Technical Specifications

The 1791DS-IB16 provides precise monitoring for safety field devices with integrated diagnostic capabilities.

• Manufacturer: Rockwell Automation / Allen-Bradley

• Model Number: 1791DS-IB16

• Safety Series: CompactBlock Guard Safety I/O

• Network Protocol: DeviceNet (CIP Safety)

• Safety Inputs: 16 Digital Inputs (Sinking)

• Test Pulse Outputs: 16 Pulse Outputs (Used for wire fault detection)

• Input Voltage Range: 11–30V DC (24V DC Nominal)

• On-state Voltage: 11V DC minimum

• Off-state Voltage: 5V DC maximum

• Input Current: 6 mA typical per channel

• Pulse Test Output Current: 0.7 A maximum per point

• Safety Rating: Up to SIL 3 (IEC 61508), Category 4, PLe (ISO 13849-1)

• Communication Rate: 125k, 250k, 500k baud (Auto-detect)

• Isolation Voltage: 50V (Continuous), Basic Insulation Type

• Power Consumption: 100 mA @ 24V DC (DeviceNet side)

• Operating Temperature: -10°C to +55°C (14°F to 131°F)

• Enclosure Type: Open Style (IP20)

• Weight: 0.99 lbs (0.45 kg)