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, engineered to monitor and interface with 24V AC signal sources in demanding industrial automation environments.
Features
16-point digital AC input configuration.
Supports a nominal input voltage of 24V AC.
Programmable input filter delay times of 9 or 18 milliseconds to accommodate varying signal noise environments.
Robust diagnostic and status monitoring capabilities within the ControlLogix system.
Designed for high-density I/O requirements in PLC-based control architectures.
Applications
This module is typically deployed in industrial control systems for monitoring AC-powered sensors, limit switches, and auxiliary contacts. It is widely used in manufacturing, power distribution, and process control applications where AC signal isolation and reliable state detection are required.
Technical Specifications
Catalog Number
1756-IN16
Module Type
Digital AC Input Module
Number of Inputs
16
Input Voltage Range
10-30 Volts AC
Nominal Input Voltage
24 Volts AC
Off-State Current (Max)
2.75 mA
Min Operating Current
5 mA at 10V AC, 60 Hz
Max Operating Current
1.2 mA at 30V AC, 60 Hz
Input Delay Time
Programmable (9 or 18 ms)
Installation Guidelines
Ensure the ControlLogix chassis is powered down before inserting or removing the module.
Use appropriate shielded cabling to minimize electromagnetic interference (EMI) in high-noise environments.
Verify that the input voltage levels strictly adhere to the 10-30V AC operating range to prevent module damage.
Ensure proper grounding of the chassis and module according to local electrical codes and Allen-Bradley installation manuals.
Maintain adequate clearance around the module to facilitate proper airflow and heat dissipation within the control cabinet.
FAQ
What is the primary function of the 1756-IN16? The 1756-IN16 is a digital input module used to interface 24V AC field signals into the ControlLogix controller for processing.
Can I adjust the input delay on this module? Yes, the input delay is programmable via the ControlLogix software, allowing for settings of either 9 or 18 milliseconds to help filter out signal bounce.
