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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 in industrial control environments. It is ideal for monitoring status signals from AC-powered sensors, switches, and pushbuttons, ensuring reliable data acquisition for complex automation tasks.
Features
- 16-point digital AC input configuration.
- Supports a nominal input voltage of 24V AC.
- Programmable input delay times of 9 or 18 milliseconds to filter noise and bounce.
- Wide operating voltage range of 10-30V AC.
- Designed for seamless integration with the ControlLogix chassis backplane.
Technical Specifications
| Part Number | 1756-IN16 |
| Module Type | Digital AC Input Module |
| Number of Inputs | 16 |
| Nominal Voltage | 24V AC |
| Operating Voltage Range | 10-30V AC |
| Input Delay Time | 9 or 18 ms (programmable) |
| Min. Operating Current | 5 mA at 10V AC, 60Hz |
| Max. Operating Current | 1.2 mA at 30V AC, 60Hz |
| Off-State Current (Max) | 2.75 mA |
Installation Guidelines
- Ensure the ControlLogix chassis is powered down before inserting or removing the module to prevent electrical damage.
- Verify that the module is fully seated in the chassis slot and secured with the top and bottom latches.
- Use appropriate shielded cabling for input signals to minimize electromagnetic interference (EMI) in high-noise industrial environments.
- Maintain proper grounding practices for the chassis and field wiring to ensure signal integrity and safety.
- Consult the official Allen-Bradley ControlLogix installation manuals for specific wiring diagrams and terminal block requirements.
FAQ
What is the primary function of the 1756-IN16?
The 1756-IN16 is used to convert 24V AC field input signals into a format that the ControlLogix processor can interpret, allowing for the monitoring of various AC-based industrial devices.
Can the input delay be adjusted on this module?
Yes, the input delay time is programmable to either 9 or 18 milliseconds, which allows users to tune the module's responsiveness to specific application requirements and signal conditions.
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