The Allen-Bradley 1756-IB16ISOE is a specialized ControlLogix DC digital input module designed for high-precision Sequence of Events (SOE) recording. This 16-point module provides individually isolated inputs, allowing for reliable monitoring in complex industrial automation environments where precise timing and event logging are critical for system diagnostics and process analysis.
Features
16 individually isolated DC digital inputs.
Advanced Sequence of Events (SOE) recording capability for precise time-stamping of input state changes.
Integrated status indicators for input monitoring, communication health, and module diagnostics.
Flexible input voltage range supporting 10-55 VDC operations.
Optimized for high-speed performance with an input delay of 50 microseconds plus programmable filter time.
Technical Specifications
Product Model
1756-IB16ISOE
Input Points
16 Individually Isolated
Operating Voltage Range
10-55 VDC
Input Voltage (Nominal)
24-48 VDC (Sink/Source)
Input Delay Time
50 microseconds + filter time
Min. Operating Current
5.5 mA at 55 VDC
Max. Operating Current
2 mA at 10 VDC
Installation Guidelines
Ensure the ControlLogix chassis is powered down before inserting or removing the module to prevent electrical damage or bus errors.
Verify that the module is fully seated in the chassis slot and secured with the top and bottom locking tabs.
Use shielded cabling for input signals to minimize electromagnetic interference (EMI) in high-noise industrial environments.
Maintain proper grounding practices for the chassis and field-side wiring to ensure signal integrity and electrical safety.
Check that the input voltage levels are within the specified 10-55 VDC range before applying power to the field devices.
FAQ
What is the primary function of the 1756-IB16ISOE module? This module is specifically designed for Sequence of Events (SOE) recording, enabling the ControlLogix system to capture and time-stamp digital input transitions with high resolution for detailed event analysis.
Are the inputs on this module isolated? Yes, the 1756-IB16ISOE features 16 individually isolated inputs, which helps protect the module and the controller from potential ground loops and electrical interference between different field circuits.
