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  • 1769-IA8I
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1769-IA8I

Allen-Bradley 1769-IA8I 8-Channel Isolated Module

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  • Manufacturer: Allen-Bradley

  • Product No.: 1769-IA8I

  • Product Type: Isolated Input Module

  • Product Origin: USA

  • Payment:T/T, Western Union

  • Weight: 200g

  • Shipping port: Xiamen

  • Warranty: 12 months

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Product Overview

The ALLEN-BRADLEY 1769-IA8I is a high-performance 8-channel digital input module designed to interface 120V AC signals with CompactLogix and MicroLogix 1500 controllers. Featuring individual channel-to-channel isolation, this module is specifically engineered for industrial environments where mixed power sources or potential ground differences exist. 

Technical Configuration

Individually Isolated Channels

Unlike standard AC modules, the 1769-IA8I provides full isolation for each of its 8 channels. This IEC Class II rated architecture allows you to monitor signals from multiple separate power sources on a single module without the risk of cross-talk or ground loop interference.

Reliable Signal Detection

The module operates within a broad AC voltage range of 79V to 132V. It features sophisticated hardware debounce filtering with a typical 20ms response time, ensuring that only valid logic transitions are processed by the controller while filtering out transient electrical noise.

Technical Specifications

Technical Parameter Detailed Rating
Number of Inputs 8 Isolated Channels
Voltage Category 120V AC (47-63 Hz)
Operating Voltage 79V AC to 132V AC
Isolation Voltage 1517V AC (1 second)
Power Consumption 1.81 Watts
On-State Current 5mA @ 74V AC (Minimum)
Operating Temp 0°C to 60°C (32°F to 140°F)

Installation Guide

Mount the module on a standard DIN rail or use a direct panel mount with a 30G shock rating. Ensure the module is placed within 8 slots of a 1769-PA or 1769-PB power supply to meet backplane current requirements. Use 22-14 AWG copper wire for all field connections and maintain clear spacing for ventilation. Note that the 1769-IA8I is not hot-swappable; system power must be disconnected before installation or removal.

Engineering Advantages

  • High Isolation Security: 1517V AC isolation protects the PLC backplane from high-voltage surges and field faults.
  • Studio 5000 Integration: Native compatibility with Rockwell Automation software allows for rapid diagnostic monitoring.
  • Rugged Durability: IP20-rated housing with 5G vibration resistance ensures stability in harsh factory environments.
  • Visual Diagnostics: Integrated LED indicators provide immediate status verification for each individual input channel.

Technical FAQs

Q1: Can I use this module to monitor signals from different AC phases?
A1: Yes. Because each channel is individually isolated, you can monitor inputs from different phases or power sources safely on the same module.

Q2: Is a specific terminal block required?
A2: Yes, the 1769-IA8I typically utilizes an 18-point removable terminal block (RTB) for secure field-side wiring connections.

Q3: What happens if the voltage drops below 79V AC?
A3: The module may enter an off-state or provide an inconsistent signal. It is rated for stable "On" operation between 79V and 132V AC.

🏷️ Tags: Isolated Input Module
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