Description
The Allen-Bradley 1756-IH16ISOE is a high-performance digital isolated input module designed for the ControlLogix platform. This module provides 16 individually isolated inputs with Sequence of Events (SOE) recording capabilities, making it ideal for monitoring critical process states where timing and event logging are essential. It is engineered to handle 125V DC sink/source signals, offering robust performance in demanding industrial environments.
Features
- 16 individually isolated input channels for enhanced electrical noise immunity.
- Integrated Sequence of Events (SOE) functionality for precise timestamping of input state changes.
- Supports a wide operating voltage range of 90-140V DC.
- Low power dissipation of 5.5 Watts at 60 degC for efficient thermal management.
- Compatible with standard ControlLogix chassis backplanes.
Applications
This module is frequently utilized in large-scale automation systems, including power distribution monitoring, emergency shutdown systems, and complex process control applications where high-voltage digital inputs and accurate event sequencing are required.
Technical Specifications
| Module Type |
Digital Isolated Input Module (SOE) |
| Input Channels |
16 (Individually Isolated) |
| Input Voltage |
125V DC (Sink/Source) |
| Operating Range |
90-140V DC |
| Backplane Current (5V) |
275 mA |
| Backplane Current (24V) |
2 mA |
| Input Delay Time |
75 microseconds + filter time |
| Min Operating Current |
1.15 mA at 90V DC |
| Max Operating Current |
1.85 mA at 140V DC |
| Max Off-State Current |
0.3 mA |
Installation Guidelines
- Ensure the ControlLogix chassis is powered down before inserting or removing the module to prevent damage to the backplane or module circuitry.
- Use appropriate shielded cabling to minimize EMI/RFI interference, especially when dealing with high-voltage DC signals.
- Verify that the input voltage levels are within the specified 90-140V DC range to maintain signal integrity and module longevity.
- Maintain proper ventilation in the control cabinet to keep the ambient temperature within the rated operating limits, ensuring the module stays below its maximum power dissipation threshold.
- Follow standard ESD (Electrostatic Discharge) mitigation practices when handling the module to protect internal electronic components.
FAQ
What is the primary function of the SOE feature on this module?
The Sequence of Events (SOE) capability allows the module to log the exact time a state change occurs on an input channel, which is critical for troubleshooting and analyzing complex industrial processes.
Does this module support both sinking and sourcing configurations?
Yes, the 1756-IH16ISOE is designed to support both sink and source input configurations, providing flexibility for various field device wiring requirements.
