Configured for discrete 120 VAC signal acquisition in ControlLogix chassis architectures, the Allen-Bradley 1756-IA16I (1756-IA16I/A input module) provides direct physical execution by accepting high-voltage alternating current field inputs across individual channel circuitry.

Catalog Designation & Hardware Variant Matrix

The base processing module is designated as 1756-IA16I. Hardware revision options include series release 1756-IA16I/A, with complete physical interchangeability guaranteed across standard ControlLogix chassis assemblies. Commercial component cross-referencing maps this assembly to spare part designation 1756IA16I.

Mechanical & Electrical Performance Metrics

Backplane Integration & High-Speed Determinism

The module executes real-time data frame transfers across the ControlLogix local backplane bus structure, preserving high deterministic network velocity across local EtherNet/IP topologies. Firmware flash compatibility checks ensure seamless I/O density scaling and automated system configuration updates upon insertion into active chassis slots without disturbing adjacent module operations.

Package Contents & Kit Details

• 1 x Allen-Bradley 1756-IA16I ControlLogix 16-Point AC Input Module
• 1 x Protective Static Shield Packaging Unit
• 1 x Factory Component Inspection Certificate Sheet

Chassis Mounting & Field Wiring Directives

• Slot Alignment: Verify module electronic keying profile in software before insertion into the targeted ControlLogix chassis slot.
• Removable Terminal Block: Utilize approved 1756-TBNH or 1756-TBSH terminal block structures; verify mechanical latch engagement prior to powering field loops.
• Isolation Clearance: Maintain individual channel isolation integrity by keeping 120 VAC power conductors physically separate from low-voltage DC communication cables.
• Grounding Requirements: Secure central chassis grounding conductors to central bus bars to mitigate high-frequency electrical noise interferences.

Technical FAQs

• What is the backplane current draw requirement for the module?

  The module draws 125 mA at 5 VDC and 2 mA at 24 VDC from the active chassis backplane assembly.

• Does this unit support individual channel-to-channel isolation?

  Yes, all 16 channels feature individual channel-to-channel isolation rated for high-voltage AC input field circuits.

• What are the configurable hardware delay times for incoming signals?

  Signal filtering hardware can be software programmed for input delay responses of either 9 ms or 18 ms.

• Can the module be inserted or removed while backplane power is applied?

  The module supports Removal and Insertion Under Power (RIUP) capability within standard industrial field operating guidelines.

• What is the maximum off-state current limit for input recognition?

  The channel input circuitry guarantees a recognized off-state provided the current remains below 2.5 mA.

• What power dissipation values must be calculated for enclosure thermal management?

  Thermal calculations should account for a maximum power dissipation profile of 4.9 W at 60 deg C operational ambient limits.

• How does electronic keying function during module replacement?

  Electronic keying prevents incorrect system startup by matching physical module profiles against firmware configurations loaded in the controller.

• What operating frequency range is permitted on the AC input channels?

  The 120 VAC input channels operate across an line frequency range spanning 47 Hz to 63 Hz.