Overview
The Allen-Bradley 1794-IA16 is a 16-point non-isolated AC digital input module built for the FLEX I/O distributed control architecture. This module accepts 120V AC input signals (74–132V AC operating range) and connects seamlessly to FLEX I/O communication adapters and terminal bases. It is ideal for applications requiring multiple discrete AC signal inputs in a compact, modular form factor.
Key Features
- 16 Non-Isolated Input Channels: Each input rated for 120V AC (nominal); operates over 74–132V AC range for flexible power supply tolerance
- Compact Modular Design: Integrates with FLEX I/O terminal bases for DIN-rail or panel mounting
- Low Current Draw: Nominal 12 mA input current per channel; 2.9 mA minimum off-state current
- Fast Response Time: 26.5 millisecond response time on both ON and OFF transitions
- Global Certifications: UL, CE, CSA, GOST, and KC listed
- Daisy-Chain Power Support: Compatible terminal bases allow multiple modules to share a single power connection
Technical Specifications
- Input Voltage: 120V AC (nominal); 74–132V AC operating range
- Input Current: 12 mA (nominal at 120V AC); 5.49–14.81 mA on-state; 2.9 mA minimum off-state
- Off-State Voltage: 20V AC maximum
- Number of Inputs: 16 channels (non-isolated)
- FlexBus Current: 20 mA
- Power Dissipation: 6.4 W at 132V AC
- Input Signal Delay: 8 ms (maximum) on both ON-to-OFF and OFF-to-ON transitions
- Operating Temperature: 0–55°C (32–131°F)
- Storage Temperature: −40–85°C (−40–185°F)
- Relative Humidity: 5–95% non-condensing
- Isolation Voltage: 1,264V AC for 60 seconds (field-to-system); 120V AC continuous isolation
- Operating Shock: 30 G; Non-operating Shock: 50 G
- Operating Vibration: 5 G at 10–500 Hz
- Dimensions: 3.7 × 3.7 × 2.7 inches
- Mounting: DIN-rail or panel mount
- Certifications: UL Listed, CE Marked, CSA, GOST, KC
- Voltage Category: Category II
Typical Applications
- Machine control systems requiring distributed discrete input acquisition
- Manufacturing process automation and production line monitoring
- HVAC and facility management systems
- Material handling and conveyor control systems
- Building automation and energy management systems
- Any distributed control application compatible with FLEX I/O architecture
Compatibility & Replacements
Compatible With
- FLEX I/O Terminal Bases: 1794-TB3, 1794-TB3S, 1794-TBN, 1794-TBN2, 1794-TB3K, 1794-TB3SK, 1794-TBNK
- FLEX I/O ControlNet Adapters: 1794-ACN, 1794-ACNR, 1794-ACNR15
- FLEX I/O Ethernet Adapters: 1794-AENT, 1794-AENTR
- FLEX I/O Remote I/O Adapter: 1794-ASB
- FLEX I/O distributed control networks and Rockwell Automation EtherNet/IP systems
Replaces / Drop-In Replacement For
The 1794-IA16 is the higher-density AC input replacement for the 1794-IA8 (8-point module). Verify compatibility with your system integrator before ordering if replacing an existing module.
Works With
- Studio 5000 (Logix Designer) for FLEX I/O configuration and monitoring
- RSLogix 5000 classic software (legacy systems)
- EtherNet/IP and PROFINET communication protocols
- ControlNet networks via compatible FLEX I/O adapters
- All Rockwell Automation CompactLogix, ControlLogix, and GuardLogix controllers supporting FLEX I/O modules
