IS2020RKPSG3A | Mark VIe Power Supply Module | New Surplus

Description

Product Introduction

The GE IS2020RKPSG3A is a VMEbus rack power supply module from the Mark VIe Speedtronic series, purpose-built to provide regulated DC power to the Mark VIe control system backplanes. This board converts the plant’s nominal 125 VDC bus (typically from battery-backed DC supplies) into the clean, regulated voltages required by processor boards, I/O modules, and communication interfaces. The G3A revision features maximum efficiency, highest current capacity, and advanced diagnostics in the RKPS series.

What sets the RKPSG3A revision apart is its robust input filtering, wide input voltage tolerance (100–150 VDC), maximum efficiency (92% typical), and advanced diagnostics including voltage monitoring, current monitoring, temperature sensing, and predictive health monitoring. The board delivers 5 VDC at up to 25 A for logic circuits, ±12 VDC at 3 A for auxiliary circuits, and 24 VDC at 4 A for field I/O—all with less than 30 mV ripple under full load. Advanced features include input transient protection, output overvoltage and overcurrent protection, and comprehensive status monitoring with predictive health indicators. For system integrators requiring maximum power capacity, highest efficiency, and advanced diagnostics from an RKPS series module, this board represents the ultimate OEM power solution for the most demanding Mark VIe systems.

Key Technical Specifications

Key Selling Points & Differentiators

• Maximum Efficiency in RKPS Series: 92% efficiency—lowest heat generation in the RKPS line, improves reliability and reduces cooling requirements.
• Highest Capacity in RKPS Series: 25 A on 5 V rail—supports the most heavily loaded backplanes within the RKPS power range.
• Multiple Output Rails: 5 V, ±12 V, and 24 V outputs—supplies all Mark VIe backplane power requirements from a single module.
• Advanced Diagnostics: Voltage, current, temperature, and health monitoring with load analysis, efficiency monitoring, and thermal profiling.
• Predictive Health Monitoring: Capacitor aging estimation and fan health monitoring for proactive maintenance planning.
• Comprehensive Protection: Foldback current limiting, overvoltage clamping, input transient protection, and thermal shutdown.
• Low Ripple Output: <30 mV peak-to-peak—ensures stable operation of sensitive processor and analog I/O boards.
• Live Test Verified: Every board undergoes a 48-hour burn-in at full rated load with cycling input voltage from 100 V to 150 V. We log output voltages, ripple, thermal performance, and diagnostic thresholds.
• 90-Day Warranty: Covers functional defects. If it fails under normal operating conditions, we replace it. No restocking fee for verified returns.
• OEM Traceability: All units come from audited surplus channels with original GE anti-static bags and serialized labels. No clones, no refurbished units with unknown repair history.
• Pre-Shipment Capacitor Reform: For units stored more than 12 months, we perform a controlled capacitor reforming procedure to prevent inrush failures.

Frequently Asked Questions (FAQ)

Q: What is the difference between IS2020RKPSG2A and IS2020RKPSG3A?

A: The G3A has significant improvements: higher 5 V current capacity (25 A vs. 22 A), higher efficiency (92% vs. 91%), lower ripple (<30 mV vs. <40 mV), higher auxiliary currents (3 A vs. 2.5 A, 4 A vs. 3.5 A), and advanced diagnostics including load analysis, efficiency monitoring, and thermal profiling. The G3A also requires Mark VIe Toolkit v7.0 or higher vs. v6.5 for G2A. If you need maximum performance and advanced diagnostics, choose G3A.

Q: What is the difference between IS2020RKPSG3A and IS2020LVPSG1A?

A: The RKPSG3A provides similar current capacity (5 V @ 25 A vs. 25 A) but slightly higher efficiency (92% vs. 91%) and lower ripple (<30 mV vs. <50 mV). The RKPSG3A includes advanced diagnostics not available on LVPSG1A. The LVPSG3A provides higher current capacity (5 V @ 30 A) and higher efficiency (93%). Choose RKPSG3A for advanced diagnostics and high performance; choose LVPSG3A for maximum current capacity.

Q: What is the difference between IS2020RKPSG3A and IS200WNPSH1A?

A: The RKPSG3A provides multiple output rails (5 V @ 25 A, ±12 V @ 3 A, 24 V @ 4 A) vs. the WNPS which provides only 5 V (20 A) and 24 V (3 A). The RKPS also has higher efficiency (92% vs. 90%), higher current capacity (25 A vs. 20 A on 5 V), and advanced diagnostics including load analysis and thermal profiling. If your backplane requires ±12 V, choose RKPSG3A.

Q: What are the advanced diagnostics features?

A: The RKPSG3A includes three advanced diagnostic features beyond standard monitoring:

• Load analysis: Tracks load trends on each output to identify developing faults
• Efficiency monitoring: Measures and trends efficiency to detect degradation
• Thermal profiling: Maps temperature distribution to identify hot spots and cooling issues

These features enable proactive maintenance and early detection of developing faults.

Q: What is the predictive health monitoring feature?

A: The RKPSG3A continuously monitors capacitor aging, fan health, and overall power supply health. It estimates remaining component life based on temperature and operating hours, enabling proactive maintenance planning. The health status is reported through the Mark VIe Toolkit with predicted remaining life indicators.

Q: What is the benefit of the 92% efficiency?

A: At 92% efficiency, the RKPSG3A generates approximately 39 W of heat at full load vs. 43 W at 91% and 48 W at 90%. This difference is significant in tightly packed cabinets and can extend the life of all components in the system. The low heat generation also reduces load on cabinet cooling fans, improving overall system reliability.

Q: Can I use this board with 24 VDC or 48 VDC input instead of 125 VDC?

A: No. The RKPSG3A is specifically designed for 125 VDC nominal input (100–150 VDC range). Using lower voltages will not produce the required outputs—the converter needs at least 90 VDC to regulate properly. Using higher voltages (above 150 VDC) will damage the input stage. If your plant uses a different DC bus voltage, you’ll need a different power supply variant or an external DC-DC converter upstream.

Q: Is this board hot-swappable?

A: No. The Mark VIe VME backplane does not support live insertion of power boards. You must de-energize the entire rack, wait for all LEDs to extinguish, and discharge the input bus capacitors (use a resistor, not a short). We’ve seen technicians try to pull an RKPS with the rack still powered—it arced across the backplane pins and took out neighboring boards. Don’t risk it.

Q: What is the typical lead time for this part?

A: We stock these on the shelf—usually ship within 24 hours of order placement and payment confirmation. For international orders, add 3–5 days for customs. If you need expedited (overnight air), we can do that, but you’ll need to coordinate with our logistics team for the cut-off time.

Q: Does this board work with both Mark VIe and Mark VIeS (SIL-rated) cabinets?

A: Yes—with a caveat. The RKPSG3A provides the same voltages for both standard and SIL-rated cabinets. However, SIL systems typically require redundant power supplies (two RKPS boards in parallel with diode isolation). The G3A can be used in those configurations, but you must ensure your backplane supports the OR-ing diodes. If your SIL system uses IS220RKPS variants, check the diode configuration first. We can help you verify compatibility if you send us your cabinet model.

Q: What’s your return policy if this doesn’t fix my power-related fault?

A: If the board is electrically functional (passes our QC test) but doesn’t clear your fault, we’ll accept a return within 30 days provided the board shows no physical damage, no blown fuses, and no signs of overvoltage stress. We do charge a 15% restocking fee if the fault was due to a downstream short circuit or incorrect input voltage. We’ll work with you over the phone to diagnose the issue before we ship—our goal is to get you running, not to ship boxes back and forth.

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