1756-IB16DK | Allen Bradley | ControlLogix Digital DC Diagnostic Input Module

Product Overview

The Allen Bradley 1756-IB16DK functions as a high-performance digital DC input module within the ControlLogix platform. It provides 16 individual diagnostic input points that detect and report field-side faults, such as open wire or short circuit conditions. This module features a K-suffix conformal coating, providing an essential layer of protection against moisture, dust, and corrosive chemical vapors. We supply this unit as 100% Brand New and Original, ready for integration into mission-critical control architectures.

Technical Specifications

The 1756-IB16DK operates within precise electrical parameters to ensure logic accuracy:

Engineering Advantages

The 1756-IB16DK addresses specific industrial pain points through advanced hardware design:

• Real-Time Diagnostics: This module identifies wire breaks and short circuits at the individual point level. This eliminates hours of manual troubleshooting by pinpointing the exact location of field-side electrical failures directly in the Studio 5000 environment.

• Corrosive Environment Resilience: The "K" designation signifies factory-applied conformal coating. This protects the internal circuitry from "creeping" corrosion in wastewater treatment plants, paper mills, and oil refineries, significantly extending the mean time between failures (MTBF).

• Enhanced Signal Integrity: A 4ms hardware delay combined with user-configurable software filters prevents "contact bounce" and electrical noise from triggering false logic states.

• Flexible Maintenance: The module supports Removable Terminal Blocks (RTB). Maintenance teams can replace a faulty module without disconnecting field wiring, reducing mean time to repair (MTTR) during critical system outages.

FAQs

• What is the significance of the 'K' in 1756-IB16DK?

  The 'K' suffix indicates that the module features a conformal coating. This specialty resin layer shields the PCB from humidity and environmental contaminants, making it the standard choice for harsh or "dirty" industrial locations.

• Does this module support "Sourcing" field devices?

  No. The 1756-IB16DK is a "Sink" input module. The field device must provide (Source) the positive voltage to the module input terminals to complete the circuit.

• Which terminal blocks should I use for this module?

  The module requires either the 1756-TBCH (36-pin Cage Clamp) or the 1756-TBS6H (36-pin Spring Clamp). These must be purchased separately if you are not reusing existing blocks.

• Can I replace a standard 1756-IB16D with this 1756-IB16DK?

  Yes. The 1756-IB16DK is functionally identical to the 1756-IB16D but includes the added benefit of conformal coating. It fits the same chassis slot and uses the same I/O configuration in your PLC program.