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The OVATION 1C31227G02 is a high-efficiency Redundant Power Supply Module designed by Emerson for its OVATION Distributed Control System (DCS), delivering critical power distribution to controllers and I/O subsystems in mission-critical environments. Engineered for 24/7 operation in power generation and heavy industrial facilities, this module provides N+1 redundancy with automatic load sharing and failover capabilities. The 1C31227G02 accepts dual AC/DC inputs (85–264 VAC or 88–300 VDC) and outputs isolated 24 VDC power with active power factor correction (PFC >0.95), minimizing harmonic distortion. Its hot-swappable design allows replacement during live operations without disrupting control loops – essential for boiler controls or turbine protection systems. Integrated diagnostics monitor voltage ripple, temperature, and load balance, while conformal coating protects against humidity and corrosive gases in harsh settings like offshore platforms or coal-fired plants.
OVATION 1C31227G02
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | 1C31227G02 |
| Manufacturer | Emerson (OVATION) |
| Product Type | Redundant Power Supply Module |
| Input Voltage | 85–264 VAC / 88–300 VDC (Auto-ranging) |
| Output Voltage | 24 VDC ±1% |
| Max Output Current | 40 A (960W) per module |
| Redundancy | N+1 Parallel Operation |
| Efficiency | 88% (Typical at full load) |
| Power Factor Correction | >0.95 |
| Protections | Overvoltage, Overtemperature, Short-Circuit |
| Operating Temperature | -40°C to +70°C |
| Cooling Method | Forced Air (Variable Speed Fan) |
| MTBF | 500,000 hours (IEC 61709) |
| Certifications | UL 508, CE, ATEX/IECEx Zone 2 |
| Dimensions | 45 x 128 x 160 mm (H x W x D) |
Main Features and Advantages
Fault-tolerant power delivery: Dual-input design with automatic crossover ensures continuous operation during grid fluctuations or generator transfers. The OVATION 1C31227G02’s current-sharing technology balances loads across parallel units within ±5%, preventing single-module overloads. Real-time health metrics (voltage/current/temperature) report via OVATION’s asset management software.
Energy optimization: Active PFC reduces input current harmonics (<10>
Safety integration: Reinforced isolation (3000 VAC input-to-output) and EN 61000-6-2/4 EMI immunity protect downstream controllers from surges. Hot-swap capability includes arc-fault containment and staggered pin engagement, allowing safe replacement in Class I Div 2 areas without hot-work permits.
Application Field
The OVATION 1C31227G02 powers critical infrastructure:
Power Generation: Supplies redundant 24VDC to turbine governor controls, burner management systems (BMS), and safety shutdown panels in nuclear/coal/gas plants.
Oil & Gas: Backups power for offshore platform subsea control modules and compressor anti-surge systems.
Chemical Processing: Ensures uninterrupted power to reactor safety interlocks and emergency venting valves.
Water Management: Supports SCADA RTUs and pump station controls during grid instability.
In steel mills, it withstands 5g vibration while powering furnace temperature controllers.
Related Products
1C31227G01: Non-redundant 24VDC power supply (20A output).
1C31182G01: System Power Supply Unit for OVATION cabinets.
1C31197G01: Controller chassis with integrated power backplane.
1C31203G01: Analog I/O module (requires 1C31227G02 power).
OCS05-24-40A: Standalone redundant PSU for non-OVATION systems.
1C31229G02: Specialty I/O module with isolated power needs.
OVATION 1C31227G02
Installation and Maintenance
Pre-installation preparation: Verify input voltage compatibility and cabinet airflow (>25 CFM). Ground chassis via 10 AWG wire. Ensure load imbalance <10>1C31227G02 units. Use torque-limited screwdriver (0.6 N·m) for terminal connections.
Maintenance recommendations: Monitor output ripple (<100>1C31227G02 per 10 deployed units.
