1734-IB8 Allen-Bradley 8 Point Digital Input Module

The 1734-IB8 is an 8-point digital input module from Allen-Bradley’s POINT I/O™ series, designed for seamless integration into distributed I/O architectures. As a compact, high-reliability automation component, it excels in monitoring discrete 24V DC signals from field devices such as sensors, switches, and pushbuttons, making it ideal for industrial control systems requiring precise, real-time data acquisition.

Core Features

• 8 Discrete Input Channels: Configured as a single group of 8 sinking inputs, supporting a wide voltage range of 10–28.8V DC with a nominal 24V DC operation.
• Robust Signal Handling: Each channel accepts a minimum ON-state current of 2mA (4mA nominal, 5mA maximum) and an OFF-state voltage of up to 5V DC, ensuring compatibility with diverse industrial sensors.
• Advanced Filtering: Combines a 0.5ms fixed hardware filter with a user-configurable software filter (0–63ms) to mitigate signal noise and optimize response times.
• Comprehensive Diagnostics: Equipped with 8 yellow LEDs (one per input channel), a module status LED, and a network status LED for real-time monitoring of operational health and signal integrity.
• Flexible Installation: Requires a 1734-TB or 1734-TBS terminal base for wiring, with a keyed switch alignment at position 1 to ensure correct orientation. Supports horizontal or vertical mounting on DIN rails.

Technical Specifications

Input Characteristics:

• Type: Sinking (NPN), differential.
• Input Impedance: 4.7kΩ max (3.6kΩ nominal).
• Field Power Bus: 24V DC nominal (10–28.8V DC range).

Power Consumption:

• Maximum power dissipation: 1.6W at 28.8V DC.
• Thermal dissipation: 5.5 BTU/hr max.
• POINT Bus current: 75mA max @ 5V DC.

Isolation & Protection:

• Continuous isolation voltage: 50V DC.
• Tested to withstand 2500V DC for 60 seconds.

Physical Dimensions:

• Size: 56mm (H) × 12mm (W) × 75.5mm (L).
• Weight: 32.3 grams.

Environmental Tolerance:

• Operating temperature: -20°C to 55°C (-4°F to 131°F).
• Open-style enclosure (no IP rating), recommended for clean, dry environments.

Compatibility & Integration

• System Compatibility: Works with all POINT I/O communication adapters (e.g., 1734-AENT, 1734-AENTR) for EtherNet/IP, DeviceNet, or PROFIBUS networks.
• Safety Certifications: Rated for Class I, Division 2, Groups A, B, C, D hazardous locations, ensuring suitability for environments with flammable gases or vapors.
• Mounting: Direct DIN rail installation via terminal base, with removable terminal blocks for simplified wiring.

Applications

The 1734-IB8 is a cornerstone in industrial automation, particularly in:

• Process Control: Monitoring temperature, pressure, and flow sensors in manufacturing.
• Discrete Manufacturing: Detecting part presence, machine status, or safety interlock signals.
• Material Handling: Tracking conveyor position, valve states, or motor feedback.
• Safety Systems: Integrating with GuardLogix or CompactGuardLogix controllers for CIP Safety protocol expansion.

Documentation & Support

• Installation Manual: 1734-IN051-EN-E.
• User Manual: 1734-UM001-EN-P.
• Technical Specifications: Available via Rockwell Automation’s Technical Documentation Center.