Product Overview: Allen-Bradley 1746-IA16
The Allen-Bradley 1746-IA16 is a high-density digital AC input module designed for the SLC 500™ programmable logic controller platform. This module features 16 discrete input points, allowing the processor to sense the ON/OFF status of various field devices operating at 120V AC, such as limit switches, push buttons, and proximity sensors. It is a critical component for industrial automation systems that require reliable AC signal interfacing in a modular chassis environment.
Technical Specifications and Performance
The 1746-IA16 operates within a nominal voltage range of 100 to 120V AC. Each input is optically isolated to protect the SLC backplane from electrical noise and voltage transients common in industrial settings. The module consumes 0.085A at 5V DC from the chassis backplane, making it energy-efficient for large-scale rack configurations. It features a removable terminal block for easy wiring and maintenance, ensuring minimal downtime during module replacement.
Key Characteristics
- Number of Inputs: 16 Points.
- Voltage Category: 100/120V AC.
- Operating Voltage Range: 85–132V AC (47–63 Hz).
- Backplane Current (5V DC): 0.085 A.
- Off-State Voltage (Max): 30V AC.
- On-State Current (Min): 5 mA at 85V AC.
- Input Delay (Max): 35ms (on/off).
Industrial Reliability
Designed for harsh environments, the 1746-IA16 maintains operational integrity at temperatures up to 60°C (140°F). The 16-point density provides an excellent balance of I/O capacity versus slot usage in SLC 1746 chassis. This module is widely utilized in water treatment, food processing, and automotive assembly lines due to its proven track record of durability and precise signal detection.
| Characteristic | Specification |
| Input Points | 16 |
| Isolation | 1500V AC (between inputs and backplane) |
| Terminal Block | 1746-RT25 (Removable) |
Frequently Asked Questions
Does this module support DC inputs? No, the 1746-IA16 is specifically for AC signals. For DC applications, consider the 1746-IB16 or 1746-IV16 modules.
Do you need more references from this brand? Explore our full catalog of Allen-Bradley here.
This 120V AC module must be installed in a compatible SLC 500 rack, such as the 1746-A7 chassis.
