The ABB TU921S (3KDE175111L9210) is a high-performance redundant termination unit designed for the Advant S900 I/O system. This unit provides a robust interface for up to 16 I/O modules, supporting critical industrial processes that require high availability and fault tolerance.
Features
- Supports redundancy for both power and communication paths to ensure system uptime.
- Designed for installation in hazardous areas with ATEX certification for Zone 1.
- Features Hot Swap functionality and Hot Configuration in Run, allowing for maintenance without process interruption.
- Equipped with G3 conformal coating on all components for enhanced environmental protection.
- Advanced diagnostic capabilities accessible via FDT/DTM for simplified troubleshooting and maintenance.
- Integrated auto-diagnostics to reduce downtime and simplify system health monitoring.
Applications
The TU921S is primarily used in process automation environments where S900 I/O systems are deployed, such as chemical, petrochemical, and power generation plants. Its redundant architecture makes it suitable for safety-critical loops and high-availability control applications.
Technical Specifications
| Product Model | TU921S |
| Order Code | 3KDE175111L9210 |
| Capacity | Up to 16 I/O modules |
| Redundancy | Power and Communication |
| Environmental Protection | G3 Coating |
| Certification | ATEX Zone 1 |
| Weight | 2.96 kg |
Installation Guidelines
- Ensure the unit is mounted in a clean, dry, and vibration-free environment suitable for its IP rating.
- Verify that the power supply is disconnected before installing or removing any I/O modules from the termination unit.
- Use shielded cabling for communication lines to minimize electromagnetic interference (EMI) in industrial environments.
- Ensure proper grounding of the termination unit chassis to the system common ground to maintain signal integrity and safety.
- Follow standard ESD (Electrostatic Discharge) handling procedures when touching internal components or connectors.
FAQ
Does this unit support hot-swapping?
Yes, the TU921S supports hot-swap functionality, allowing you to replace modules while the system is running.
Is this unit suitable for hazardous locations?
Yes, the TU921S is ATEX certified for installation in Zone 1 hazardous areas.
How many I/O modules can be connected to this unit?
This termination unit is designed to accommodate up to 16 S900 I/O modules.
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