The Allen-Bradley 1756-IM16I is a high-performance, 16-point isolated digital input module designed for the ControlLogix platform. This module is engineered to interface with 240V AC field devices, providing robust signal isolation to protect the controller from electrical noise and potential ground loops in industrial environments.
Features
16 individually isolated inputs for enhanced signal integrity and circuit protection.
Designed for 240V AC operation with a broad voltage range of 159-265V AC.
Programmable input delay times of 9 or 18 milliseconds to accommodate varying signal requirements.
Integrated status indicators for real-time monitoring of input states.
Compatible with standard ControlLogix chassis configurations.
Technical Specifications
Module Type
Isolated Digital Input
Input Points
16 (individually isolated)
Voltage Category
240V AC
Operating Voltage Range
159-265V AC
Min. Operating Current
5 mA at 159V AC, 60 Hz
Max. Operating Current
13 mA at 265V AC, 60 Hz
Max. Off-State Current
2.5 mA
Input Delay Time
Programmable (9 or 18 ms)
Installation Guidelines
Ensure the ControlLogix chassis is powered down before inserting or removing the 1756-IM16I module to prevent electrical arcing or damage to the backplane.
Verify that the module is fully seated in the chassis slot and secured with the top and bottom latching mechanisms.
Use appropriate shielded cabling for field wiring to minimize electromagnetic interference (EMI).
Maintain proper grounding practices for the chassis and field devices to ensure optimal isolation performance.
Ensure adequate ventilation around the chassis to maintain ambient temperatures within the manufacturer's specified operating limits.
FAQ
Q: Is this module compatible with standard 120V AC systems? A: No, the 1756-IM16I is specifically designed for 240V AC applications with an operating range of 159-265V AC.
Q: What does the 'I' in the model number signify? A: The 'I' indicates that the module features individually isolated inputs, which provide electrical separation between channels.
