The Allen-Bradley 1769-IA8I is an 8-channel AC digital input module designed for the CompactLogix™ and MicroLogix™ 1500 controller families. A standout feature of this specific model is itsindividually isolated channels, which allow each input to operate on a different phase or separate power source. It is engineered to receive 100–120V AC signals, making it an essential component for monitoring motor starters, limit switches, and pushbuttons in diverse industrial power environments.
Technical Specifications
Manufacturer:Allen-Bradley (Rockwell Automation)
Product Line:CompactLogix / MicroLogix 1500
Part Number:1769-IA8I
Module Type:Individually Isolated AC Input Module
Number of Inputs:8 (Individually Isolated)
Voltage Category:100/120V AC
Operating Voltage Range:79–132V AC (47–63 Hz)
Input Delay (ON/OFF):20 ms / 20 ms
Current Draw:90 mA at 5.1V
Power Supply Distance Rating:8 modules
Input Impedance:12 kΩ at 50 Hz / 10 kΩ at 60 Hz
Isolation Voltage:1517V AC for 1 s (Input-to-Bus and Group-to-Group)
Dimensions:1.38 x 3.43 x 4.65 inches (Single-slot width)
Weight:0.43 kg (0.94 lbs)
Key Features
Individually Isolated Channels:Unlike standard modules that share a common return, each point on the 1769-IA8I is electrically isolated from the others. This permits the use of multiple AC power sources on a single module without risk of cross-talk or short circuits.
Robust Noise Immunity:Designed with a 20 ms hardware filter to prevent false triggering from electrical noise and contact bounce common in AC circuits.
Flexible Mounting:Supports both DIN rail and direct panel mounting, adhering to the modular standards of the Logix platform.
Front-Panel Status LEDs:Includes 8 green LED indicators to provide real-time visual confirmation of each input's logic state.
High Shock and Vibration Resistance:Rated for 30g operating shock (panel-mounted) and 5g vibration, ensuring reliability in heavy machinery environments.
