Allen-Bradley | 1756-IB16 | ControlLogix (1756 Series)

Product Description: Allen-Bradley 1756-IB16

The Allen-Bradley 1756-IB16 is a 16-channel digital input module for ControlLogix systems, designed to interface with 24V DC sourcing (PNP) field devices. This module provides reliable signal acquisition for discrete automation applications, with per-channel status indication and high-speed response capability. Its compact size and modular integration with ControlLogix chassis make it ideal for systems requiring robust DC input performance.

Key Features

• 16 DC sinking (PNP-compatible) input channels
• 24V DC nominal input voltage
• Individually monitored channels with LED status indicators
• Supports both single-ended and group input configurations
• Built-in protection against transients and short circuits
• Compatible with ControlLogix controllers and Studio 5000
• Uses removable terminal blocks (RTBs) for simplified wiring and replacement

Technical Specifications

• Input Voltage Range: 10–30V DC (nominal 24V DC)
• On-State Voltage: ≥10V DC
• Off-State Voltage: ≤5V DC
• On-State Current: ≥2 mA
• Off- State Current: ≤1.5 mA
• Input Delay (default): 1 ms (configurable)
• Isolation Voltage: 250V (backplane-to-field)
• Backplane Current Draw:
• 120 mA @ 5.1V DC
• 2 mA @ 24V DC
• Operating Temperature: 0°C to 60°C
• Mounting: Any I/O slot in ControlLogix chassis
• Required RTBs: 1756-TBNH, 1756-TBSH, or equivalent 36-position RTB
• Certifications: UL Listed, CE, CSA, RoHS, Class I Div 2

Application Areas

• Discrete sensing in manufacturing and packaging lines
• Machine status monitoring and limit switch inputs
• Automotive and OEM control systems
• PLC panels requiring reliable DC input acquisition
• Material handling and motion control systems

Advantages

• Reliable signal acquisition for high-speed digital inputs
• High isolation ensures noise immunity and circuit protection
• Compact and efficient I/O integration in ControlLogix systems
• Easy installation and maintenance with RTB design
• Fully supported by Rockwell Automation’s Studio 5000 environment