1771-ID16 | Allen-Bradley PLC-5 Digital AC/DC Input Module

Product Overview

The Allen-Bradley 1771-ID16 functions as a versatile high-density input interface within the classic PLC-5 architecture. This module provides 16 individual input points designed to sense discrete signals from devices operating at a 120V AC/DC voltage category. It bridges the gap between high-voltage field devices—such as limit switches, motor starter contacts, and pushbuttons—and the PLC-5 backplane logic. We supply this unit in 100% Brand New condition, providing an essential hardware solution for facilities maintaining the high-reliability standards of legacy 1771 I/O platforms.

Technical Specifications

• Module Type: Digital AC/DC Input Module

• Number of Inputs: 16 Points

• Voltage Category: 120V AC/DC

• AC Operating Voltage: 77–138V AC

• DC Operating Voltage: 105–138V DC

• Backplane Current: 75 mA

• Typical Signal Delay (On): 1 ms (AC and DC)

• Typical Signal Delay (Off): 9 ms (DC) / 9 or 18 ms (AC)

• Max Off-State Current: 4.0 mA (AC) / 1.8 mA (DC)

• Required Wiring Arm: 1771-WN

• Weight: 0.94 lbs (0.43 kg)

Engineering Advantages

The 1771-ID16 solves critical integration and maintenance challenges in large-scale industrial environments:

• Dual-Medium Sensing: The unique circuitry handles both AC and DC signals on the same module. This flexibility allows engineers to mix different signal types within the same I/O rack, reducing the total number of spare modules required and optimizing chassis space.

• Rapid Signal Acquisition: A 1 ms "On" delay ensures the processor detects field changes almost instantly. This speed proves vital for high-speed interlocking and sequence control where timing accuracy impacts production safety and throughput.

• Industrial-Grade Noise Immunity: The high-voltage threshold prevents nuisance tripping caused by induced voltages or "ghost" signals common in long cable runs alongside power leads. The module maintains a high off-state current maximum to ensure the PLC ignores leakage current from field sensors.

• Simplified Field Maintenance: Compatibility with the 1771-WN wiring arm enables "dead-front" wiring. Maintenance personnel can replace the module without disturbing field wiring, which eliminates the risk of rewiring errors and drastically shortens system MTTR (Mean Time To Repair).

FAQs

• Can I use the 1771-ID16 with 125V DC control circuits?

  Yes. The DC operating voltage range extends up to 138V DC, making it perfectly compatible with standard 125V DC stationary battery systems often found in power utility and heavy industrial applications.

• Does this module require a specific slot in the 1771 chassis?

  No. You can install the 1771-ID16 in any available I/O slot in a 1771 universal I/O chassis. However, ensure the backplane current draw fits within the power supply's total capacity.

• Is this unit a Brand New original product?

  Yes. We guarantee this 1771-ID16 is 100% Brand New and original. Using brand-new 1771 modules is critical for legacy systems, as it ensures internal optoisolators and capacitors possess their full design life, avoiding the failure risks associated with aged or used components.

• Which wiring arm do I need for this module?

  The module requires the 1771-WN wiring arm. This arm hinges onto the chassis and connects field wires to the module’s front-facing pins, ensuring secure and organized terminal management.