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Description
The Allen-Bradley 1756-IN16 is a high-performance digital AC input module designed for integration within the ControlLogix platform. This module provides 16 isolated input channels, specifically engineered to interface with 24V AC field devices. It is widely utilized in industrial automation environments to monitor status signals from sensors, switches, and relays, ensuring reliable data acquisition for the ControlLogix controller.
Features
- 16-point digital AC input configuration.
- Designed for 24V AC nominal input voltage operation.
- Programmable input delay times (9 or 18 milliseconds) to filter out unwanted signal noise.
- Compatible with standard ControlLogix chassis mounting for seamless system expansion.
- Status indicators on the front panel for rapid diagnostic and channel-level monitoring.
Technical Specifications
| Catalog Number |
1756-IN16 |
| Module Type |
Digital AC Input Module |
| Number of Inputs |
16 |
| Nominal Input Voltage |
24V AC |
| Operating Voltage Range |
10-30V AC |
| Input Delay Time |
Programmable (9 or 18 ms) |
| Min. Operating Current |
5 mA at 10V AC, 60 Hz |
| Max. Off-State Current |
2.75 mA |
| Manufacturer |
Allen-Bradley |
Installation Guidelines
- Ensure the ControlLogix chassis power is removed before inserting or removing the 1756-IN16 module to prevent electrical damage.
- Verify that the module is fully seated in the chassis slot and that the locking tab is engaged.
- Adhere to proper grounding practices for the chassis and field wiring to minimize electromagnetic interference (EMI).
- Use shielded cabling for input signals where necessary, especially in environments with high-frequency noise or long cable runs.
- Maintain adequate ventilation within the control cabinet to keep the module within its specified operating temperature range.
FAQ
What is the primary function of the 1756-IN16?
This module serves as a digital interface to detect 24V AC signals from external field devices and transmit that data to the ControlLogix processor.
Can I adjust the input response time?
Yes, the input delay time is software-programmable to either 9 or 18 milliseconds, allowing for flexibility in filtering noisy signals.
Is this module compatible with other ControlLogix I/O?
Yes, the 1756-IN16 is a standard ControlLogix module designed to fit into any 1756 series chassis.
