The ICS Triplex T8231 is a 750W 24Vdc hot-swappable redundant power supply module designed exclusively for the Rockwell Automation Trusted safety control system. As a core component of the PD‑T823X series high-reliability power system, it is engineered for critical process control and safety instrumented system (SIS) applications. It supports a wide-range AC input, active current sharing, overcurrent and overvoltage protection, as well as online diagnostics. The module can operate independently as a single unit or form an N+1 redundant architecture with multiple modules to ensure continuous power supply for Trusted controllers and field devices, meeting the high availability and high stability requirements of industrial safety systems.
Download
Positioning & Application Scenarios
Suitable for the Trusted TMR Triple Modular Redundant Safety Control System, providing stable DC power supply for T8100 series controllers and I/O modules.Applied in safety-critical and high-reliability industrial scenarios such as oil & gas, chemical, nuclear power, metallurgy, etc.Supports 19-inch standard cabinet installation and is compatible with the T8230 1U power supply rack, enabling full configuration of 3 modules and hot maintenance.
Key Technical Specifications
1. Electrical Specifications
- Rated output: 24Vdc / 31.25A / 750W
- Input voltage: 90–264Vac (global universal wide range)
- Input frequency: 47–63Hz
- Power factor: ≥0.95 (typically 0.99 at full load >50%)
- Efficiency: 78%–84% (varies with input voltage)
- Voltage regulation accuracy: ±2% (including line, load and temperature variations)
- Ripple & noise: ≤150mVp‑p (20MHz bandwidth)
- Hold-up time: ≥20ms@600W
- Inrush current: <25A at no-load; peak ≤50A at full load
2. Protection & Diagnostics
- Overcurrent protection: steady-state current limit 40A; fast overload protection triggered at 35A
- Overvoltage protection: 29–32Vdc, requires restart / reinsertion for reset
- Overtemperature / fan fault: triggers alarm and shuts down output
- Status indicators: AC OK (green), PWR OK (green for normal / amber for fault)
- Isolation voltage: 3000Vac between primary and secondary sides; 1500Vac for primary / secondary sides to ground
3. Mechanical & Environmental
- Dimensions: fits T8230 1U rack, standard power supply module structure
- Weight: approx. 2.3kg
- Operating temperature: 0–60°C (derating at 1.333%/°C from 45–50°C; 4.667%/°C from 50–60°C)
- Relative humidity: 10%–95% non-condensing
- Altitude: -60–3962m (temperature derating required above 2438m)
- Safety certifications: UL certified (E223750/E223749), complies with IEC 61000 series EMC / immunity requirements
Core Functions & Advantages
Hot-swapSupports online insertion and removal without power interruption or system shutdown. Replacement can be completed in three steps:gently insert → AC OK illuminates → fully push in until PWR OK illuminates, with no impact on system operation.
Active Current SharingAutomatic current sharing in multi-module parallel operation; rack-to-rack current sharing is achieved via TC-323 interconnection cables, improving redundancy reliability.
Redundancy & N+1 ArchitectureA single rack with 3 modules can be configured for N+1 redundancy with an output of 1500W; full configuration delivers 2250W, and multi-rack stacking supports up to 9000W.
Comprehensive Diagnostics & AlarmsDry contact signals for AC fault, DC fault, and overtemperature / fan fault are output through the Power Port for integration into system monitoring.
High-Reliability DesignActive PFC, MTBF ≥ 4×10⁵ hours, meeting long-term trouble-free operation requirements for safety systems.
System Supporting Components
- T8230: 19-inch 1U power supply rack, accommodates up to 3 T8231 modules
- T8233: Power Port diagnostic interface, for adapting alarm dry contacts
- T8234: Power controller, adjusts output voltage in real time and monitors up to 12 modules
- TC-323: Rack interconnection cable, for current sharing and controller communication
- T8235: Power supply blanking plate, covers empty slots
Frequently Asked Questions (FAQ)
Q1: What is the difference between T8231 and T8232?A: T8231 is 24Vdc/750W, designed exclusively for the Trusted system. T8232 is 28Vdc/750W, used for field-adjustable power supply. They share the same input and power rating, differing only in output voltage.
Q2: Does T8231 support true hot-swap? Will plugging or unplugging affect the system?A: Yes, it supports online hot-swap. Insert gently as per the procedure; after AC OK illuminates, push the module fully in until PWR OK lights up. This will not interrupt power or cause system faults.
Q3: What to do if current sharing is abnormal or PWR OK does not light up under light load?A: The current sharing circuit may behave abnormally when single-module load is < 2A. It is recommended to increase the load or adjust the redundancy ratio. Rack-to-rack current sharing must use TC-323 interconnection cables; cross-connection to separate busbars is prohibited.
Q4: What fault does an amber PWR OK indicator indicate?A: It usually indicates a fan fault or internal overtemperature. The module will automatically shut down the output. Check cooling and fan condition, and replace the module if necessary.
Q5: What is the maximum number of T8231 modules that can be connected in parallel?A: One T8234 controller can manage up to 4 racks × 3 modules = 12 T8231 units, with a total power of 9000W. The Power Port address jumpers must be set correctly.
Q6: Will overcurrent protection cause a trip? What are the two trigger logics?A: 1) Slow overload: voltage derating, output drops to 18.75V at 40A; 2) Fast transient overload: protection shutdown triggered at 35A, suitable for system fault conditions.
Q7: How to implement N+1 redundancy?A: In a single rack with 3 T8231 modules, any one module acts as a backup, providing 1500W output. Failure of any single module will not affect continuous system power supply.
Q8: How to troubleshoot if AC OK is on but PWR OK is off or amber?A: First check for output short circuit or overload. Then verify fan operation and temperature. If the problem persists, perform a hot-swap reset. Replace the module if the issue remains unresolved.
3005319639