Allen Bradley 1771-IBN PLC-5 Digital DC Input Module

Product Overview

The Allen Bradley 1771-IBN serves as a high-density digital DC input interface for the legacy PLC-5 platform. This module expands system capacity by providing 32 discrete input points, organized into four isolated sets of eight. We supply this unit as 100% Brand New and Original, featuring a factory-applied conformal coating to ensure long-term survival in corrosive or high-humidity industrial environments. It effectively bridges field-side DC devices with the PLC-5 backplane, facilitating high-speed logic execution for complex automation sequences.

Technical Specifications

The 1771-IBN utilizes a sinking input configuration (sourcing load) and operates within the following parameters:

Engineering Advantages

• Optimized Rack Density: By offering 32 points in a single 1771 slot, this module doubles the I/O density compared to standard 16-point modules. This allows engineers to expand legacy systems without installing additional remote I/O chassis.

• Corrosive Atmosphere Protection: The conformal coating shields internal traces and components from salt spray, moisture, and chemical vapors. This treatment prevents dendritic growth and premature hardware failure in harsh processing plants.

• Precision Signal Filtering: An integrated 6ms digital filter debounces incoming field signals. This hardware-level filtering eliminates false triggering caused by contact bounce or electromagnetic interference (EMI) on the signal lines.

• Simplified Maintenance: The compatibility with the 1771-WN wiring arm allows for "hot-swapping" the module electronics without disturbing the field wiring. This design reduces Mean Time to Repair (MTTR) during critical maintenance windows.

FAQs

• What is the primary difference between the 1771-IBN and standard DC modules?

  The 1771-IBN provides a higher point density (32 inputs) and includes a factory-applied conformal coating. Most standard 1771 modules offer only 8 or 16 points and lack the specialized environmental coating found on the "N" designated versions.

• Can I use the 1771-IBN with a sourcing field device?

  No. The 1771-IBN is a Sinking module. It requires a sourcing field device (where the device provides the positive voltage to the input). If your field devices are sinking, you must select a sourcing input module instead.

• Does this module require a specific wiring arm?

  Yes. You must use the 1771-WN wiring arm. The higher pin density of the 32-point module requires this specific arm to accommodate the increased number of termination points compared to 16-point modules.

• Is this a refurbished or "New-Old-Stock" unit?

  We guarantee this unit is 100% Brand New and Original. It arrives in factory-sealed Allen Bradley packaging with all original seals intact, ensuring the highest level of hardware reliability for your PLC-5 architecture.