Description
Key Specifications
| Parameter | Specification |
|---|---|
| Input Voltage | 24 VDC nominal (18–32 VDC range) |
| Output Voltages | +5 VDC @ 25 A (main logic supply), +3.3 VDC @ 20 A (VME I/O and processor core supply), ±12 VDC @ 3 A each (analog and communication interfaces), Standby +5 VDC @ 2 A (for battery charging and RTC retention) |
| Total Output Power | 200 W typical, 250 W peak (improved over VPWRH1A) |
| Efficiency | >88% at full load (improved over VPWRH1A) |
| Input Protection | Reverse polarity, overvoltage (crowbar), overcurrent, and transient suppression (MIL-STD-1275A compliant) |
| Output Protection | Individual channel overcurrent limiting, short-circuit protection, thermal shutdown, and overvoltage clamping |
| Status Indicators | LED array for input OK, each output rail OK, fault conditions, and diagnostic blink codes |
| Monitoring | On-board voltage/current telemetry accessible via I/O Net (standard) |
| Operating Temp | –25 °C to +70 °C (extended range) |
| Humidity | 5–95% non-condensing (with conformal coating) |
| Coating | Conformal coating (standard) — UV-traceable |
| Manufacturing | 96-hour burn-in, 100% X-Ray/AOI, premium component selection |
| Form Factor | 6U VME64x (160 × 233 mm), single-slot width |
| Connectors | VME64x P1/P2 backplane connector + front-panel DC input terminal block with captive washer screws and gold-plated contacts |
| Cooling | Convection with forced-air assist (minimum 150 LFM) |
| Diagnostic Memory | Non-volatile fault logging — stores last 500 events with timestamps |
Advantages & Distinctive Features
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Higher Output Capacity: 200 W total output (versus 150 W on VPWRH1A)—supports larger racks with more I/O boards.
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Higher Efficiency: >88% (versus >85% on VPWRH1A)—reduces heat generation and improves reliability.
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Extended Temperature Range: –25 °C to +70 °C operation—suitable for unheated cabinets and harsh environments.
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Improved Current Capacity: +5 V @ 25 A (versus 20 A) and +3.3 V @ 20 A (versus 15 A)—handles power-hungry processor and I/O boards.
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Enhanced Diagnostics: Expanded LED blink codes and 500-event fault log for comprehensive troubleshooting.
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Conformal Coating Standard: Protects against humidity, salt spray, and chemical vapors—suitable for coastal, offshore, and industrial environments.
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Gold-Plated Captive Washer Terminals: Corrosion-resistant and vibration-proof DC input connections.
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Hot-Swappable: Supports removal and replacement without powering down the rack.
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Direct Retrofit: Replaces VPWRH1A and older power supply modules.
Application Fields
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Turbine Control Racks: Primary power source for Mark VIe racks housing VPRO processor boards and I/O terminal boards.
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I/O Expansion Racks: Powers distributed I/O cabinets.
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Redundant Power Configurations: Used in pairs for mission-critical applications (gas turbines, steam turbines, compressors).
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Retrofit Projects: Replaces older VPWR series modules when upgrading to Mark VIe.
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Offshore Platforms: Salt-spray environments requiring conformal coating.
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Arctic/Desert Installations: Extreme temperature environments.
Comparison with VPWRH1A and Competitors
| Feature | GE IS2020LVPSG1A | GE IS200VPWRH1A | Competitor A | Competitor B |
|---|---|---|---|---|
| Output Power | 200 W | 150 W | 120 W | 100 W |
| +5 V Capacity | 25 A | 20 A | 15 A | 12 A |
| +3.3 V Capacity | 20 A | 15 A | 10 A | 8 A |
| Efficiency | >88% | >85% | >85% | >85% |
| Temp Range | –25 to +70 °C | 0 to +60 °C | 0 to +55 °C | –10 to +55 °C |
| Coating | Standard | Optional | Optional | Optional |
| Fault Logging | 500 events | No | No | No |
| Hot-Swappable | Yes | Yes | No | Yes |
The GE IS2020LVPSG1A offers superior output capacity, efficiency, environmental protection, and diagnostics—making it the ideal power supply solution for modern Mark VIe systems.
Selection Guidelines
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When to choose: Primary or redundant power supply for any Mark VIe VME rack requiring higher capacity—especially for racks with multiple processor or I/O boards.
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Load Calculation: Sum all board loads—ensure total does not exceed 200 W (250 W peak). +5 V rail capacity is 25 A max; +3.3 V rail is 20 A max.
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Redundancy Planning: For critical turbines, order two GE IS2020LVPSG1A units with a diode-OR backplane or external redundancy module.
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Input Wiring: Use appropriately sized conductors (minimum 12 AWG) for DC input. Install a fast-acting fuse (25 A) or circuit breaker per NEC/CEC requirements.
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Cooling: Ensure cabinet airflow ≥150 LFM; derate maximum output power by 10% for every 5 °C above 60 °C ambient.
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Compatibility: Fits all Mark VIe VME64x racks. Requires ControlST v6.5 or higher for full diagnostic features.
Operational Precautions
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Input Polarity: Double-check DC input polarity before power-up—reverse polarity protection is present but sustained reversal may damage input capacitors.
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Load Calculation: Verify total rack load does not exceed 200 W. Overloading the +5 V rail (25 A max) is a common installation error—measure current draw during commissioning.
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Battery Backup: For systems requiring uninterrupted operation during input power sags, use a DC UPS (e.g., 24 V battery string) upstream of the GE IS2020LVPSG1A.
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Status Monitoring: Regularly check front-panel LEDs—if any rail LED is amber/red, investigate the downstream load for shorts or excessive current draw.
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Redundancy Testing: For redundant configurations, perform manual failover tests during outages—verify that the standby unit takes over seamlessly without voltage dips.
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Fault Log: Access 500-event log via Toolbox ST for post-event analysis—review voltage/current trends to identify issues.
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Coating Care: Use GE-approved cleaner; inspect annually under UV—rework voids with approved coating per GE FSB.
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Hot-Swap: Remove/insert slowly under power—processor auto-recognizes new module.
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Spare Stock: Maintain 1 spare per 3–4 racks; “LVPSG1A” backward-compatible with VPWRH1A sockets.
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Firmware Updates: Ensure the GE IS2020LVPSG1A is in “standby” mode during updates.
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ESD: Handle by edges only with grounded wrist strap—coating does not protect connectors.
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Storage: Anti-static bag with desiccant at –40 to +85 °C; rotate every 3 years for coating inspection.
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