The Allen-Bradley 1756-IB16I, also cataloged as the 1756-IB16I ControlLogix Input Module, operates as a dedicated hardware component for 16-point discrete signal evaluation and channel isolation within ControlLogix local chassis backplanes.

Architecture & Catalog Variant Mapping

• 1756: ControlLogix chassis-based programmable automation controller hardware platform family.
• IB16I: 10 to 30 VDC discrete sink/source input circuit architecture featuring 16 individually isolated channels.
• 1756-IB16I/A: Revision designation identifying internal hardware series and backplane board layout assemblies.

Hardware Parameters & Operational Limits

Network Communication & Architecture Integration

The digital card processes real-time field status tags and transfers input data across EtherNet/IP deterministic networks via the ControlLogix backplane interface. Channel grouping enables independent wiring circuits without cross-channel electrical noise coupling. Integrated backplane logic optimizes I/O density scaling while ensuring continuous board-level firmware flash compatibility during controller system updates.

Package Delivery Manifest

• 1 x Allen-Bradley 1756-IB16I ControlLogix Input Module

Physical Installation & Field Wiring Rules

• Align module rear circuit board guides with selected 1756 chassis backplane slot.
• Press module firmly until top and bottom chassis latches snap securely into position.
• Wire discrete DC input signals using a compatible 36-pin removable terminal block assembly.
• Maintain proper field cable shielding and ground terminal connections to avoid ground loop current paths.

Technical FAQ

• What field voltage range is supported across the input channels?

  The module accepts discrete input signal levels operating within 10 to 30 VDC ranges.

• How are the 16 digital channels isolated internally?

  Each individual channel features dedicated galvanic channel-to-channel isolation on the circuit board.

• What Removable Terminal Block (RTB) interface is required for field connection?

  Field wiring connects to the front interface via a standard 36-pin RTB terminal block assembly.

• Can the module be inserted or removed under system power?

  Yes, ControlLogix modules support Removal and Insertion Under Power (RIUP) without backplane disruption.

• Does the module support sinking and sourcing field input wiring configurations?

  Yes, isolated channel architecture allows independent sinking or sourcing field wiring choices per point.

• How does the module communicate with the central Logix processor?

  It streams discrete status data over the 1756 backplane using producer/consumer communication models.

• What physical chassis platform is compatible with this hardware?

  The module installs directly into any available slot of a standard Allen-Bradley 1756 ControlLogix chassis.

• What shielding protocol should be used for field signal lines?

  Connect field cable shields to a designated enclosure ground bar to mitigate industrial noise coupling.