Product Overview
The Allen-Bradley 1769-IA8I is an individually isolated 120VAC input module from the 1769 Compact I/O series. It provides eight isolated input channels designed to accept 79-132VAC signals at 47-63 Hz, making it a robust choice for industrial control systems. This module is compatible with CompactLogix and MicroLogix 1500 controllers, offering reliable performance in demanding automation environments.
Technical Specifications
Key specifications for the Allen-Bradley 1769-IA8I are listed below. These values are directly from the manufacturer's data and ensure accurate integration into your control system.
| Specification |
Value |
| Series |
1769 Compact I/O |
| Module Type |
Individually isolated discrete input module |
| Part Number |
1769-IA8I |
| Brand |
Allen-Bradley |
| Manufacturer |
Rockwell Automation |
| Number of Inputs |
8 isolated input channels |
| Input Voltage |
100/120 VAC |
| Operating Voltage Range |
79-132 VAC |
| Input Frequency |
47-63 Hz |
| Module Width |
Single slot |
| Supported Mounting |
DIN rail / Panel mount |
| Input Delay Time, OFF to ON |
20 ms |
| Backplane Current at 5.1V |
90 mA |
| Product Line |
CompactLogix |
| Input Type |
Analog Input |
| Communication Cable |
8 Point |
| Shipping Weight |
2 lbs. |
| Shipping Dimensions |
8 x 8 x 5 in. |
| Enclosure Type |
Open |
| Backplane Current at 24V |
1.4 Amps |
| Power Consumption |
33.6 Watts |
| Power Dissipation |
7.5 Watts |
| UPC |
10662468992838 |
Key Features & Benefits
-
Individually isolated inputs provide electrical isolation between channels, reducing interference and improving signal integrity.
-
Wide operating voltage range (79-132VAC) ensures compatibility with varying line conditions.
-
Fast response time of 20 ms for OFF-to-ON transitions supports time-critical applications.
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Flexible mounting options include DIN rail and panel mount, simplifying installation.
-
Power supply distance rating of 8 allows placement up to eight modules away from the power supply, offering layout flexibility.
Industry Applications
In packaging machinery, the Allen-Bradley 1769-IA8I monitors 120VAC sensor signals for product presence and position, enabling precise control of conveyor systems. The isolated inputs prevent electrical noise from affecting the controller, ensuring consistent operation.
For material handling systems, this module interfaces with limit switches and photoeyes, providing reliable status feedback to the CompactLogix processor. Its 20 ms response time allows rapid detection of jams or misalignments, minimizing downtime.
In HVAC building automation, the 1769-IA8I accepts inputs from 120VAC thermostats and pressure switches, helping manage environmental conditions efficiently. The wide voltage tolerance accommodates voltage fluctuations common in commercial power supplies.
Installation & Setup
Mount the Allen-Bradley 1769-IA8I into any available single slot in a 1769 chassis. Secure it with the mounting screws, then connect wiring to the terminal block according to the wiring diagram. For DIN rail mounting, snap the module onto the rail and lock it in place. Ensure the power supply distance rating of 8 is respected; do not place the module more than eight slots away from the power supply. Verify that the input voltage is within 79-132VAC before powering the system.
Maintenance & Reliability
Regularly inspect the module for dust accumulation and ensure proper airflow around the enclosure. Check that all wiring connections remain tight and free of corrosion. The module operates reliably in temperatures from 0 to 60°C and can be stored from -40 to 85°C. Periodic testing of input channels with a known signal source can help detect early failures. Following these simple steps extends the service life of the 1769-IA8I and reduces unplanned downtime.
Compatibility & Integration
The Allen-Bradley 1769-IA8I integrates seamlessly with CompactLogix and MicroLogix 1500 controllers. It can be used with 1769 power supplies such as 1769-PA2, 1769-PB2, 1769-PA4, and 1769-PB4 to power the bus. The module's isolated inputs make it suitable for applications where ground potential differences exist between field devices and the controller.
Selection Guide & Purchasing Advice
Before purchasing, confirm that your system requires an 8-point AC input module with isolation. Verify the input voltage range matches your field devices. Ensure your chassis has an available slot and that the power supply distance rating is not exceeded. PLC Source PRO offers this genuine Allen-Bradley 1769-IA8I module, backed by our commitment to quality and fast shipping.