Allen-Bradley 1771-IQ16 PLC-5 Isolated Digital DC Input Module

Product Overview

The 1771-IQ16 provides high-density digital sensing for the Allen-Bradley PLC-5 platform. This module interfaces 16 discrete DC input signals from field devices—such as limit switches, photoelectric sensors, and proximity sensors—directly to the processor. It supports a wide operating range of 10-32V DC, making it compatible with standard 24V DC industrial control circuits. We supply this unit as 100% Brand New and factory-original, ensuring your legacy 1771 Universal I/O chassis maintains peak performance despite the manufacturer's 2020 discontinuation.

Technical Specifications

The 1771-IQ16 utilizes isolated circuitry to protect the PLC backplane from external electrical transients.

Engineering Advantages

• Superior Signal Isolation: The 1771-IQ16 features robust electrical isolation between the field-side inputs and the logic-side backplane. This prevents high-voltage spikes or ground loops from damaging the PLC processor, which is a critical advantage in large-scale plants with long wire runs.

• Flexible Voltage Compatibility: The 10-32V DC range accommodates fluctuating power supplies. It ensures reliable "ON" state detection even during significant voltage drops in busy industrial DC grids, effectively eliminating intermittent signal faults.

• High-Density Rack Efficiency: By packing 16 inputs into a single 1771 slot, this module maximizes your chassis real estate. This allows for system expansion or complex machine control without the need to purchase additional expensive I/O racks.

• Drop-in Replacement Integrity: As a 100% Brand New unit, the 1771-IQ16 requires no software changes or hardware modifications. You simply slide it into the existing slot and reconnect the wiring arm to restore full machine functionality instantly.

FAQs

• Does the 1771-IQ16 require a specific wiring arm?

  Yes. You typically pair this module with the 1771-WN or 1771-WH wiring arm. The arm allows you to swap modules without disconnecting individual field wires, which significantly reduces downtime during maintenance.

• Can I use this module with 12V DC systems?

  Yes. The 1771-IQ16 activates at 10V DC, making it perfectly suitable for both 12V DC and standard 24V DC control architectures.

• Since this part is discontinued, how do you guarantee its "Brand New" status?

  We source these modules from climate-controlled, factory-sealed surplus inventories. Every 1771-IQ16 arrives in its original Allen-Bradley box with factory seals intact, ensuring the internal capacitors and components have zero operational wear.

• What is the difference between this and non-isolated modules?

  Non-isolated modules often share a common ground. The isolated design of the 1771-IQ16 provides a higher layer of protection for the CPU, making it the preferred choice for environments with high electromagnetic interference (EMI) or varying ground potentials.