The Allen Bradley 1794-IA16 is a FLEX I/O AC digital input module designed to interface 120V AC field signals with distributed FLEX I/O systems. It provides 16 non-isolated input channels, enabling efficient monitoring of AC-powered sensors, switches, and field devices in industrial automation environments.
This module is widely used in legacy and modernized control systems where high-voltage AC signal acquisition is required at the I/O level. It integrates with FLEX I/O adapters such as EtherNet/IP, ControlNet, DeviceNet, and Remote I/O, making it a versatile component in hybrid automation architectures.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Model Number | 1794-IA16 |
| Product Family | FLEX I/O |
| Module Type | AC Digital Input Module |
| Input Channels | 16 points |
| Input Voltage Range | 74–132V AC (ON state) |
| OFF State Voltage | ≤ 20V AC |
| Nominal Input Voltage | 120V AC |
| Input Type | Non-isolated AC inputs |
| Input Current | Approx. 12 mA at 120V AC |
| Power Supply | Via FLEX I/O backplane (24V DC system supply) |
| FlexBus Current | ~20 mA |
| Power Dissipation | ~6.4 W |
| Diagnostics | 16 individual LED status indicators |
| Mounting Type | DIN rail with FLEX I/O terminal base |
| Terminal Base Compatibility | 1794-TB2 / TB3 series |
| Operating Temperature | 0°C to 55°C |
| Protection Class | IP20 (open-style industrial enclosure) |
Physical Dimensions & Weight (L × W × H Combined)
| Parameter | Specification |
|---|---|
| Dimensions (L × W × H) | 94 × 94 × 69 mm |
| Weight | Approx. 0.11 kg |
Recommended Related Models
The 1794-IA16 is typically used in FLEX I/O systems alongside complementary input/output and communication modules.
| Related Model | Description |
|---|---|
| 1794-OA16 | AC Output Module |
| 1794-IB16 | 24V DC Input Module |
| 1794-OB16 | Digital Output Module |
| 1794-IE8 | Analog Input Module |
| 1794-OE4 | Analog Output Module |
| 1794-TB3 | Terminal Base Unit |
| 1794-AENT | EtherNet/IP Adapter |
| 1794-AENTR | Redundant EtherNet/IP Adapter |
| 1794-ACN15 | ControlNet Adapter |
| 1794-ASB | Remote I/O Adapter |
Popular Allen Bradley Automation Products
Allen Bradley FLEX I/O modules are commonly deployed in industrial automation systems requiring modular and scalable I/O architectures.
| Popular Model | Product Category |
|---|---|
| 1756-L85E | ControlLogix Controller |
| 1769-L36ERM | CompactLogix Controller |
| 5069-IF8 | Analog Input Module |
| 2711P-T12C4D8 | PanelView HMI |
| 20G11NC072AA0NNNNN | PowerFlex 755 Drive |
| 1734-AENTR | POINT I/O Adapter |
| 1606-XLS240E | Industrial Power Supply |
| 1756-EN2TR | Ethernet/IP Communication Module |
| 1794-IE8 | FLEX I/O Analog Module |
| 25B-D013N114 | PowerFlex 525 Drive |
