Description
Key Technical Specifications
- Product Model: HD8311
- Manufacturer: Triconex
- System Platform: Tricon Safety Instrumented Systems (TMR Architecture)
- Nominal Input Voltage: 24 V DC (range 22-31 V DC), providing stable operation across fluctuating field power sources.
- Input Fuse Rating: 15 A time-delay, protecting against overcurrent and facilitating safe maintenance.
- Output Voltage: Regulated DC for chassis backplane, ensuring consistent power to processor and I/O modules.
- Output Hold Time: Minimum 2.8 ms (from nominal to 0 V), critical for ride-through during brief power interruptions without system reset.
- Power Capacity: Supports full chassis load up to 240 W equivalent, accommodating high-density I/O configurations.
- Diagnostic Indicators: PASS, FAULT, ALARM, TEMP, BAT LOW LEDs for real-time status monitoring.
- Operating Temperature Range: 0°C to +60°C, suitable for cabinet-mounted installations in controlled industrial environments.
- Dimensions (W x H x D): Approximately 43 mm x 270 mm x 320 mm, optimized for slot insertion in high-density chassis.
- Weight: Approximately 2.7 kg, balanced for easy handling during rack maintenance.
- Isolation: High galvanic isolation between input and chassis, preventing ground faults from propagating.
- Certifications: TÜV certified for SIL 3 (IEC 61508), AK6, Class I Div 2/Zone 2 hazardous locations, nuclear 1E qualified per NRC guidelines.
- MTBF: Exceeds 500,000 hours, reflecting robust design for continuous operation in safety-critical applications.
- Redundancy Support: Dual hot-swappable configuration capable, enabling online replacement without process interruption.
- EMC Compliance: IEC 61000-6-2/4, ensuring immunity in electrically noisy environments typical of petrochemical plants.
Technical Architecture & Functional Positioning
In Tricon TMR systems, this power module resides in the dedicated left-side slots of the chassis, converting incoming 24 V DC to regulated supplies for the Tribus backplane and modules. Its design emphasizes fault tolerance through independent regulation paths and comprehensive self-monitoring, aligning with the system’s triple-redundant philosophy for processors and I/O while providing dual-redundant power paths.
Key technologies include active load sharing in redundant pairs, where two modules distribute current evenly and seamlessly transfer full load upon failure of one unit. Built-in battery backup interfaces maintain diagnostics during total power loss, and alarm relays signal external panels for proactive response. These features address critical engineering needs in safety systems, such as preventing spurious trips from power glitches and ensuring graceful degradation—vital in applications where loss of control could lead to hazardous releases or equipment damage.
The module’s high-density format supports expanded I/O counts without additional chassis space, reducing footprint in space-constrained installations. Diagnostic integration with TriStation software allows remote monitoring of voltage margins and temperature, enabling predictive maintenance to further enhance availability.
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