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Phone：+86 17062388866Description
The ICS Triplex 9451 is a high-availability triple-redundant (TMR) power supply module engineered for mission-critical safety instrumented systems (SIS) in hazardous industrial environments. As a core component of Rockwell Automation’s Trusted® platform, this module delivers SIL 3 (IEC 61508/61511) certified power distribution to TMR controllers and I/O modules, ensuring zero-downtime operation in oil/gas emergency shutdown (ESD), fire and gas (F&G), and turbine protection systems. The 9451 features three independent 24V DC power converters with active load sharing and automatic failover, providing N+2 redundancy for Trusted® racks like the 9151TR. Its ruggedized construction withstands extreme temperatures (-40°C to +70°C), 5g vibration, and corrosive atmospheres, making it indispensable for offshore platforms, nuclear plants, and chemical facilities where power integrity directly impacts functional safety.
Designed for seamless integration, the ICS Triplex 9451 includes comprehensive diagnostics for voltage regulation (±0.5%), current limiting, and thermal protection. Front-panel LEDs provide real-time status of each converter, while galvanic isolation (1,500V AC) prevents fault propagation between channels. For brownfield upgrades, the module maintains backward compatibility with legacy Trusted® systems, enabling straightforward replacement of older power supplies without rack modification.
ICS TRIPLEX 9451
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | ICS Triplex 9451 |
| Manufacturer | ICS Triplex (Rockwell Automation) |
| Product Type | TMR Power Supply Module |
| Input Voltage | 100-240V AC (auto-ranging) |
| Output Voltage | 24V DC ±0.5% |
| Output Current | 10A per converter (30A total shared) |
| Redundancy | Triple modular (N+2) |
| Efficiency | 88% (typical) |
| Operating Temperature | -40°C to +70°C |
| Isolation | 1,500V AC (input-output, channel-channel) |
| Protections | Overcurrent, Overtemperature, Short-circuit |
| MTBF | >500,000 hours (TÜV-certified) |
| Cooling | Convection (fanless) |
| Certifications | SIL 3, ATEX/IECEx Zone 2, DNV-GL |
| Housing | IP20 (19″ rack mount) |
Main Features and Advantages
Ultimate power resilience: Triple independent converters with active current balancing ensure uninterrupted 24V DC during single/double failures. The ICS Triplex 9451 maintains voltage regulation within ±0.5% during 100% load transients, preventing controller brownouts.
Intelligent diagnostics: Real-time monitoring of converter health, load sharing imbalance, and temperature derating. Predictive failure alerts via Trusted® Toolbox software enable proactive maintenance before redundancy loss.
Safety by design: Reinforced isolation barriers meet SIL 3 single-fault tolerance requirements. Current limiting (<11a>
Maintenance optimization: Hot-swappable module replacement without system shutdown. Corrosion-resistant conformal coating withstands salt spray (ISO 9227 C5).
Application Field
The ICS Triplex 9451 secures critical power in:
Offshore Oil & Gas: Powers SIL 3 ESD systems on FPSOs with 50g shock tolerance
Nuclear Power: Backup power for reactor trip systems (IEEE 384 qualified)
Chemical Plants: Redundant power for toxic gas detection in sulfuric acid units
LNG Terminals: Cryogenic valve control power at -40°C ambient
Mining: Hoist brake safety circuits in methane-rich environments
ICS TRIPLEX 9451
Related Products
Trusted® 9151TR: 19-slot TMR chassis for 9451 installation
ICS Triplex 9432: TMR digital input module
Trusted® T8400: Main TMR safety controller
ICS Triplex 9189: Legacy power supply (direct replacement)
Trusted® T8461: Profibus DP-V1 communication module
9472TR: Intrinsic safety isolator for Zone 0
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