Allen-Bradley 1771-IAD 120V AC/DC 16-Input Module

Allen-Bradley 1771-IAD Discrete Input Module Overview

Key Features and Technical Specifications

• The Allen‑Bradley 1771‑IAD features 16 input channels accepting a voltage range of 79‑138 Volts for both AC and DC operation, with a 120V AC/DC voltage category.
• Users can select typical On‑Delay times: 3 ms (±0.1 ms) or 10 ms (±1 ms) for DC signals, and 5 ms (±3 ms) for AC signals. The module has a typical Off‑Delay of 25 ms (±5 ms) for both AC and DC.
• The module draws 195 mA from the backplane at 5V DC and has a maximum AC Off‑State current of just 2.8 mA.
• It includes input filtering to reduce electrical noise and optoelectrical isolation to protect system logic from transients.

Chassis Compatibility and Installation

• You can install the 1771‑IAD module in multiple 1771 chassis, including the 1771‑A1B, A2B, A3B, A3B1, A4B, 1771‑AM1, and AM2.
• Proper keying ensures correct installation. Set the upper connector key between pins 14 and 16 and the lower connector key between pins 10 and 12.
• The module's dimensions are 3.5 x 6.5 x 2.0 inches (89 x 165 x 51 mm), offering a compact footprint for your I/O rack.

Frequently Asked Questions

• What is the operating voltage range for the 1771‑IAD? The 1771‑IAD operates reliably within a voltage range of 79 to 138 Volts for both AC and DC inputs.
• What chassis are compatible with this module? You can mount the 1771‑IAD in a variety of 1771 chassis, such as the 1771‑A1B, A2B, A3B, A3B1, A4B, 1771‑AM1, and AM2 series.
• What are the available signal delay settings? The Allen‑Bradley 1771‑IAD offers selectable Off‑to‑On delays. For DC, choose 3ms or 10ms; for AC, it's 5ms (typical). The On‑to‑Off delay is typically 25ms for both.
• Does the module come with the wiring arm? Yes, the package includes the 1771‑WH wiring arm. This accessory functions as a removable terminal block for easy installation and maintenance.
• What is the backplane current requirement for this module? The 1771‑IAD draws 195 mA from the 5V DC backplane supply.

Partner Information

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Contact Information

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Email: sales@nex-auto.com
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