The Allen-Bradley 1756-IH16ISOE is a specialized 16-point digital isolated input module designed for the ControlLogix platform. This module is engineered for Sequence of Events (SOE) recording, providing high-resolution time-stamping for critical process events. With individual isolation for each input, it ensures robust signal integrity and protection against cross-channel interference in demanding industrial environments.
| Model | 1756-IH16ISOE |
| Input Voltage Range | 90-140V DC |
| Backplane Current (5V) | 275 mA |
| Backplane Current (24V) | 2 mA |
| Off-State Current | 0.3 mA |
| Operating Current (90V DC) | 1.15 mA (min) |
| Operating Current (140V DC) | 1.85 mA (max) |
| Input Delay Time | 75 microseconds + filter time |
What is the primary function of the SOE feature in this module?
The Sequence of Events (SOE) functionality allows the module to capture the exact time a state change occurs on an input, which is critical for diagnostics and post-incident analysis in complex automation sequences.
Can this module handle both sink and source inputs?
Yes, the 1756-IH16ISOE is designed to support both sink and source configurations for 125V DC inputs, providing flexibility for various field device requirements.
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