1719-IR4B Allen-Bradley 4-Ch RTD Input Safe Module

Product Overview

The Allen-Bradley 1719-IR4B is a high-performance, 4-channel RTD input module designed for the 1719 Ex I/O platform. This module provides intrinsically safe connections for resistance temperature detectors (RTDs) located in hazardous areas. Engineered for precision and reliability, the 1719-IR4B translates resistance signals into digital temperature data, making it an essential component for temperature monitoring in chemical, oil, and gas processing environments. Its compact design and advanced signal processing ensure accurate measurements even in electrically noisy industrial settings.

Technical Configuration

• Manufacturer: Allen-Bradley (Rockwell Automation)
• Full Model: 1719-IR4B
• I/O Type: 4-Channel RTD Input
• Rated Voltage: 12V DC
• Wiring Compatibility: 0.14 mm² to 1.5 mm² (26 to 16 AWG)
• Wire Type: Unshielded (Supports cost-effective installation)
• Platform: 1719 Ex I/O Distributed I/O System

Technical Specifications

Advanced Features & Operational Advantages

1. Intrinsically Safe Precision: The 1719-IR4B is specifically designed for Ex-certified applications. It features advanced signal processing capabilities that filter out interference, providing enhanced measurement accuracy for critical temperature loops. Despite its specialized safety functions, the module remains lightweight at 0.23 kg, facilitating easy handling during field maintenance.

2. Simplified Wiring & Installation: Designed with the end-user in mind, this module supports a wide range of wire sizes (up to 1.5 mm²). The unshielded wire compatibility reduces installation costs and complexity. Clear labeling and a user-friendly terminal interface allow for rapid deployment and intuitive troubleshooting in the field.

3. Robust Isolation Protection: To ensure system-wide stability, the module includes built-in galvanic isolation. This protection prevents ground loops and protects the backplane electronics from field-side surges, making it ideal for the harsh operational environments typically found in heavy industry.

Installation Guidelines

Mounting: The 1719-IR4B snaps securely into the 1719 Ex I/O terminal base. Ensure the chassis is properly grounded according to hazardous area standards. The module is hot-swappable, allowing for replacement without powering down the entire I/O rack.

Wiring: Use copper wire with a cross-section between 0.14 and 1.5 mm². While unshielded wire is compatible, ensure all wiring follows the specific "Entity Parameters" listed in the Rockwell Automation certification documents for intrinsically safe installations.

Thermal Management: Maintain adequate clearance around the I/O rack to ensure the module operates within its -20°C to 60°C temperature range. High-density mounting in enclosures may require forced-air cooling in warmer climates.

Technical FAQs

Q: What types of RTDs are compatible with the 1719-IR4B?
A: It generally supports standard Platinum (Pt) and Copper (Cu) RTDs, though you should verify specific resistance curves (e.g., Pt100) in the official Rockwell configuration software.

Q: Can I use this module in a non-hazardous area?
A: Yes, while it is designed for Ex zones, it can be used in general-purpose applications that require high-density, isolated RTD inputs.

Q: Does the module require separate field power?
A: No, the 1719-IR4B is powered through the 1719 backplane, utilizing the 12V DC system voltage provided by the power supply module.