DS3815PCMA1E1E | GE Mark VI IS200 Power Supply Module In Stock

Description

Product Introduction

The GE DS3815PCMA1E1E is the ultimate ruggedized power supply module for the Mark VI Speedtronic turbine control rack. This IS200-series PSU combines every available enhancement in the DS3815 power supply family: 48 VDC input, MIL-spec double-sided conformal coating, extended temperature rating, enhanced output filtering, and the latest 1E1E manufacturing revision with improved thermal management and component selection. It is the most capable and reliable PSU GE ever produced for the Mark VI system.

The DS3815PCMA1E1E provides three output rails: 48 VDC for the CPU bus, 24 VDC for field device loop power, and 5 VDC for logic-level circuits. Total output capacity is 250W with ripple reduced to <20 mV on the 5V rail. The M in the suffix indicates MIL-spec conformal coating, while the 1E1E revision includes the latest manufacturing improvements: 105°C capacitors, enhanced thermal vias, and refined control circuitry for tighter voltage regulation across temperature extremes. Critical for offshore platforms, marine installations, desert environments, and any application where standard PSUs fail prematurely. The module includes the same backplane-specific connector as all Mark VI power supplies, sliding directly into the rack and communicating status (voltage good, overcurrent, overtemperature) to the CPU via discrete signals.

Key Technical Specifications

Key Selling Points & Differentiators

• Complete Environmental Protection: MIL-spec double-sided conformal coating provides maximum protection against salt spray, moisture, dust, and chemical vapors. The 1E1E revision has improved coating adhesion and edge coverage vs. earlier PCMA variants.
• Ultra-Low Output Ripple: <20 mV on the 5V rail—the cleanest power available from any DS3815 PSU variant. Essential for high-precision analog measurements, vibration monitoring, and high-speed communications.
• Extended Temperature Range: Rated for -40 to +75°C ambient. Uses 105°C-rated capacitors, automotive-grade MOSFETs, and enhanced thermal management for reliable operation in extreme environments.
• Tightest Voltage Regulation: ±1% on 5V rail and ±2% on 24V/48V rails—significantly tighter than standard variants. Ensures stable power for sensitive processor and I/O circuits across all load and temperature conditions.
• Longest Hold-Up Time: 25 ms vs. 20 ms on standard variants. Provides additional ride-through during momentary input power dips—critical in marine and offshore installations with generator switching or battery transfer events.
• 48 VDC Input with Full 250W Capacity: Direct solution for plants with 48 VDC battery banks. Delivers full power for heavily populated racks.
• Full Load Bank Test at Elevated Temperature with Complete Verification: Every unit runs on our test rig at +75°C ambient for 24 hours, pulling full 250W load. We measure output ripple with a 100 MHz oscilloscope, verify hold-up time exceeds 22 ms, and perform UV inspection for coating integrity. Capacitors replaced on units manufactured before 2015. New thermal interface material applied to critical components.
• Surplus/Refurbished with 1-Year Warranty: New surplus (original GE packaging) or professionally refurbished to as-new condition. 1-year warranty, 30-day return.

Frequently Asked Questions (FAQ)

Q: What’s the difference between DS3815PCMA and DS3815PCMA1E1E?

The 1E1E is a later manufacturing revision with several improvements:

• Tighter voltage regulation: ±1% on 5V vs. ±3% on earlier PCMA variants.
• Longer hold-up time: 25 ms vs. 20 ms.
• Improved efficiency: >87% vs. >86%.
• Enhanced thermal management: Additional thermal vias and improved component placement for better heat dissipation.
• Better coating adhesion: The 1E1E revision has improved conformal coating application for better edge coverage and adhesion.
• Automotive-grade MOSFETs: Higher reliability under temperature cycling.

Functionally, they deliver the same 250W with the same filtering and ruggedization. If you’re replacing a PCMA with a PCMA1E1E, it’s a direct drop-in—no software or wiring changes needed.

Q: What’s the difference between DS3815PCMA1E1E and DS3815PCLA1D1D?

Environmental protection and filtering combination. The PCLA1D1D has conformal coating (single-sided, standard thickness) and enhanced filtering. The PCMA1E1E has MIL-spec double-sided coating (thicker, more durable) and the same enhanced filtering, plus the 1E1E manufacturing improvements (tighter regulation, longer hold-up). The PCMA1E1E is the top-tier variant—it combines the best of everything: ruggedization, filtering, temperature range, and manufacturing quality. The PCLA1D1D is a step below in environmental protection but still excellent for most applications.

Q: Can I use this PSU to power a full 15-slot Mark VI rack?

Yes—the PCMA1E1E delivers 250W total, sufficient for a fully populated rack. At temperatures above 65°C, derating applies. At 75°C, you lose approximately 25% of capacity—down to about 187W. Calculate your actual load and cabinet temperature. The tighter regulation and longer hold-up of the 1E1E are especially valuable in heavy-load configurations where standard PSUs may struggle with voltage dips during load transients.

Q: What’s the correct polarity for the 48 VDC input?

The input terminals are labeled “+” and “−” on the front panel. Polarity matters—reverse polarity will trigger the internal protection diode and the PSU will not power up. Correct the polarity and it will start normally. The PCMA1E1E has improved reverse polarity protection that recovers more gracefully than earlier variants.

Q: Can I run two PCMA1E1E units in redundant configuration?

Yes—the PCMA1E1E supports active current sharing for N+1 redundancy with improved load-sharing accuracy (±3% vs. ±5% on earlier variants). Two units in parallel will each run at approximately 50% load, reducing internal heating and extending component life. In marine and offshore environments, redundancy is critical. We can supply matched pairs tested for current sharing across the full temperature range and with environmental verification completed on both units.

Q: How does the tighter voltage regulation help my system?

The 5V rail powers all logic circuits on the CPU and I/O modules. Standard PSUs have ±5% regulation—meaning the 5V rail can vary from 4.75V to 5.25V. The PCMA1E1E’s ±1% regulation keeps it between 4.95V and 5.05V. This matters because some IS200 modules (especially older revisions) are sensitive to supply voltage variations. We’ve seen cases where a 5V rail at 4.8V caused intermittent communication errors on certain analog modules—the PCMA1E1E eliminates that variable.

Q: What are the status LED patterns indicating?

Three LEDs on the front panel: DC OK (green), Overload (yellow), Overtemperature (red). Normal: green steady, yellow off, red off. If yellow is steady, you’re in current limit. If red is on, the PSU is overtemperature. The PCMA1E1E has a slightly higher overtemperature trip point (88°C internal) vs. earlier variants (85°C) due to the 1E1E’s improved thermal management.

Q: Is there a fuse on this board that I can replace in the field?

No user-replaceable fuse. The PCMA1E1E uses solid-state current limiting. If the PSU doesn’t power up, it’s either input power missing, wiring error, or internal failure. Do not open the casing—internal capacitors hold charge. The MIL-spec coating makes field repair even more difficult. Send it to us for evaluation.

Q: Can I use a standard 48 VDC DIN-rail power supply instead of this board?

No. The DS3815PCMA1E1E is a backplane-specific module with proprietary connector and output ramp timing. A DIN-rail supply won’t match the timing, won’t survive the environment without MIL-spec coating, and won’t meet the tight regulation requirements of sensitive Mark VI modules. Stick with the original board.

Q: Is the PCMA1E1E worth the premium over other variants?

That depends on your application. Here’s our honest assessment:

• Standard environment, clean power, moderate temperature: The PACA or PCBA is sufficient. No need for the premium.
• High temperature but clean environment: The PCBA (extended temp) is sufficient.
• Vibration but clean environment: The PCLA1D1D is sufficient.
• Corrosive environment (offshore, marine, chemical): The PCMA is worth the premium.
• Corrosive environment + sensitive analog + extreme temperature: The PCMA1E1E is the right choice—it’s the only variant that combines all protections.

In our experience, customers who bought the PCMA1E1E for harsh environments have seen 5-7 years of reliable service. The additional cost is amortized over the extended lifespan and avoided downtime. If your cabinet is in a clean control room, save your budget and buy the PCBA.

Q: I’m offshore and have had multiple PSU failures. Should I upgrade to the PCMA1E1E?

Yes—this is the definitive solution for offshore environments. The PCMA1E1E combines MIL-spec coating (salt spray protection), extended temperature rating (for hot turbine decks), enhanced filtering (for sensitive analog measurements), and the latest 1E1E improvements (tighter regulation, longer hold-up). We’ve supplied this exact variant to multiple offshore operators with excellent results. In one case, a North Sea platform went from PSU failures every 8-12 months to 6+ years of continuous operation with the PCMA1E1E. The upfront cost is higher, but the total cost of ownership is significantly lower.

Q: Is the PCMA1E1E compatible with standard Mark VI racks?

Yes—it fits the same IS200 backplane slot as all other DS3815 PSU variants. No adapter plates or mechanical modifications needed. The backplane connector is identical. Direct swap for any other DS3815 PSU—same dimensions, same connector, same terminal layout. No software changes required.

Q: How do I verify the conformal coating is intact on the 1E1E?

We perform UV light inspection on every refurbished PCMA1E1E unit. The coating fluoresces under UV, making any cracks, bubbles, or missing areas visible. We reject any unit with compromised coating and recoat it. We include a detailed UV inspection report with every shipment, including photos showing complete coverage. The 1E1E revision has improved coating adhesion, making it less susceptible to peeling or cracking than earlier PCMA variants.

8440-2165
FANUC A06B-6290-H207
BENDER IRDH375B-435
A-B MVI56E-MNETC