The Allen-Bradley 1756-IA32 is a high-density AC input module designed for use with the ControlLogix system. It features 32 input channels, divided into two groups of 16. The module accepts input voltages in the range of 74–132 VAC, making it suitable for a variety of industrial applications. With built-in isolation between groups, this module ensures stable operation even if one group experiences a fault. It also offers configurable input delay times and is compatible with Removable Terminal Block (RTB) modules for easy signal termination.

Technical Specifications

• Manufacturer: Rockwell Automation
• Brand: Allen-Bradley
• Part Number/Catalog No.: 1756-IA32
• Module Type: Digital DC Input Module
• Series: ControlLogix
• No. of Inputs: 32 (16 per group)
• Input Voltage: 120 VAC (50/60 Hz)
• Operating Voltage Range: 74–132 VAC
• Current Draw:
  • 2 mA at 24 VDC
  • 165 mA at 5.1 VDC
• Power Dissipation (Max): 6.1 W at 60 °C (140 °F)
• Thermal Dissipation: 20.8 BTU/hr at 60 °C (140 °F)
• Input Delay Time (OFF to ON):
  • Hardware delay: 1.5 ms nominal, 10 ms max
  • Plus user-selectable filter time (1 ms or 2 ms)
• Input Delay Time (ON to OFF):
  • Hardware delay: 1 ms nominal, 8 ms max
  • Plus user-selectable filter time (9 ms or 18 ms)
• Isolation:
  • Group-to-group isolation
  • Input-to-backplane isolation
  • No isolation between input channels
• Maximum Inrush Current: 390 mA
• Maximum Input Current (OFF State): 2.5 mA
• Operating Current (ON State):
  • Minimum: 5 mA at 74 V AC
  • Maximum: 15 mA at 132 V AC
• Removable Terminal Block (RTB):
  • 1756-TBCH (Cage Clamp Terminal)
  • 1756-TBS6H (Spring Clamp Terminal)
• Backplane Power: 0.9 W
• Continuous Isolation Voltage: 250 V
• Voltage Category: 120 V AC, 50/60 Hz