Allen-Bradley | 1756-IA16 | ControlLogix (1756 Series)

Product Description: Allen-Bradley 1756-IA16

The Allen-Bradley 1756-IA16 is a 16-channel digital input module for the ControlLogix platform, designed to receive signals from 120V AC field devices such as switches, sensors, and pushbuttons. The module provides reliable AC signal detection for discrete control applications, with built-in input filtering and status LEDs. It is ideal for standard industrial environments where AC input devices are commonly used.

Key Features

• 16 AC digital input channels
• Supports 120V AC nominal input voltage at 47–63 Hz
• Common input groups for simplified wiring
• Built-in input filtering to reduce false triggering
• LED indicators for per-channel status monitoring
• Compatible with standard ControlLogix chassis and RTBs
• Suitable for general-purpose AC signal acquisition

Technical Specifications

• Input Voltage Range: 74–132V AC
• Frequency: 47–63 Hz
• On-State Voltage: ≥74V AC
• Off-State Voltage: ≤20V AC
• On-State Current: ≥6.0 mA
• Off-State Current: ≤2.0 mA
• Input Delay:
  • On: 8.3 ms (default)
• Isolation Voltage: 250V (backplane-to-field)
• Backplane Current Draw:
  • 120 mA @ 5.1V DC
• Operating Temperature: 0°C to 60°C
• Mounting: Any I/O slot in a ControlLogix chassis
• Required RTBs: 1756-TBNH, 1756-TBSH, or equivalent 36-position
• Certifications: UL Listed, CE, CSA, RoHS, Class I Div 2

Application Areas

• Industrial environments using 120V AC input devices
• Switch and pushbutton panels
• Packaging, HVAC, and material handling systems
• OEM equipment requiring standard AC signal monitoring
• Discrete input panels in process and factory automation

Advantages

• Reliable detection of standard 120V AC field inputs
• Efficient 16-channel input density saves panel space
• Built-in filtering improves performance in noisy environments
• Per-channel LED indicators for simplified diagnostics
• Fully compatible with the ControlLogix platform and Studio 5000