Overview
The Allen-Bradley 1769-IA16 is a CompactLogix 16-point 120VAC digital input module designed for distributed I/O applications in industrial automation and motion control systems. This module integrates directly with CompactLogix controllers and is part of the 1769 Compact I/O family, enabling engineers to build modular, scalable control architectures with minimal footprint. The module features electronically protected inputs with status LED indicators for real-time diagnostics.
Key Features
- 16-point digital input channels operating at 120VAC nominal
- Operating voltage range 79–132VAC (47–63 Hz), accepts wide-range AC sources
- 20 millisecond response time for time-critical sensing applications
- Electronic input protection and 250 mA maximum inrush current per channel
- Status LED indicators for each input point
- Finger-safe covers and removable terminal blocks for safe, easy wiring
- Compatible with CompactLogix controllers and MicroLogix 1500 systems
- DIN rail and panel mount options for flexible installation
Technical Specifications
Key electrical and physical parameters verified from manufacturer and distributor documentation:
- Input Voltage (Nominal): 100–120VAC
- Operating Voltage Range: 79–132VAC
- Frequency: 47–63 Hz
- Input Impedance: 12 kΩ @ 50 Hz; 10 kΩ @ 60 Hz
- On-State Threshold: 79VAC minimum
- Off-State Maximum: 20VAC maximum
- Input Current (On-State): 5–12 mA depending on voltage
- Off-State Current: Max 2.5 mA
- Maximum Inrush Current: 250 mA
- Response Time: 20 milliseconds
- Power Consumption: 115 mA @ 5.1VDC (0.575W)
- Heat Dissipation: 3.3W typical; 2.7 BTU/hour
- Number of Channels: 16 (single common group)
- Mounting: DIN rail or panel mount
- Dimensions: 4.65″ W × 1.38″ H × 3.43″ D (5.43″ H with tabs)
- Weight: 0.61 lbs (280 g)
- Operating Temperature: 0–60°C
- Enclosure Type: Open-style
- Protection: Electronically protected
- Certifications: UL, CUL, C-TICK, CCC, GOST, KC, MARINE
- Power Supply Distance Rating: 8 modules
- Compatible Power Supplies: 1769-PA2, 1769-PB2, 1769-PA4, 1769-PB4
Typical Applications
The 1769-IA16 is widely used for:
- Distributed discrete input sensing in assembly lines and packaging equipment
- Sensor input consolidation for limit switches, proximity sensors, and pushbuttons
- Remote I/O racks connected to CompactLogix controllers via communication adapters
- Machine control and process automation requiring localized input sensing
- Cabinet-constrained applications where compact form factor is critical
- Integration with PowerFlex drives and other Compact I/O modules over industrial networks
Compatibility & Replacements
The 1769-IA16 integrates seamlessly with the CompactLogix platform. It connects directly to CompactLogix L18, L19, L24, L33, L35E, and L55 controllers, and is compatible with MicroLogix 1500 systems via adapter modules. The module requires one of four compatible power supplies: 1769-PA2, 1769-PB2, 1769-PA4, or 1769-PB4.
For distributed I/O over fieldbus, the 1769-IA16 can be paired with communication adapter modules such as the 1769-AENTR (EtherNet/IP), 1769-SDN (DeviceNet), or 1769-ADN (ControlNet adapter) to extend reach beyond local CompactLogix racks. No direct mechanical or electrical replacement exists within the Compact I/O family; alternative input modules include the 1769-IA16F (filtered 16-point 120VAC input) for noise-sensitive applications.
