DS200LRPBG1AAA | GE Surplus Stock

Description

Product Introduction

The DS200LRPBG1AAA is the third hardware spin of GE’s relay output board for the Mark V turbine control system. That third “A” in the suffix isn’t marketing fluff—it signals two actual PCB trace changes and a different relay vendor.

What did GE fix between the G1A and the G1AAA? The original run had a ground plane splitting issue on channels 9 through 12. Those four outputs would occasionally self-trip when adjacent channels switched simultaneously. The AAA revision moves the ground vias and swaps the original Omron relays for Panasonic equivalents with higher vibration tolerance (7G vs 4G). If you have persistent nuisance trips on those middle channels, this board typically kills them.

Key Technical Specifications

Compatible Replacement Models

✅ Drop-in Replacement: DS200LRPBG1A
Second revision without the Panasonic relay swap. Same pinout, same firmware behavior. The only difference is vibration tolerance. For stationary turbines (not on ships or mobile platforms), the G1A works fine. For marine or locomotive applications, spring for the AAA.

✅ Drop-in Replacement: DS200LRPBG1
Original release with Omron relays. Swaps directly. However, we’ve seen channel crosstalk on high-vibration sites. Test it first. If you see flickering LEDs on channels 10 or 11 while channel 9 is active, swap to the AAA.

⚠️ Software Compatible: DS200LRPAG1
Older 24-channel board. Same backplane connector, but your PLC logic must be reconfigured. You lose channels 25 through 32 entirely. Estimate two hours of engineering time to remap I/O tables.

❌ Hardware Incompatible: Mark VIe (IS200R)**
Completely different backplane architecture. Do not attempt. You’d need a new rack, power supply, and all I/O termination boards.

Frequently Asked Questions (FAQ)

What does the “AAA” suffix actually mean on a GE board?
GE used a three-character suffix system. First letter = major hardware revision (silicon changes). Second letter = minor layout change (component moves). Third letter = component vendor or value change. So AAA means: first major rev (A), first minor rev (A), first component rev (A). Some boards go to ABB or even BAA. This one never progressed past AAA because Mark V ended production.

Can I use a DS200LRPBG1AAA to replace a failed DS200LRPBG1 without changing anything else?
Yes. Pull the old board. Insert the AAA. Power up. The backplane and firmware are identical from the PLC’s perspective. But do a full I/O checkout anyway—trust nothing. We once saw a AAA board where channel 5’s relay was stuck closed from the factory. Rare but possible.

How do I visually identify a genuine AAA board vs a relabeled G1A?
Three tells:

1. Relay branding: AAA uses Panasonic relays. They have a white “Panasonic” or “NAiS” logo. G1A uses Omron (red “Omron” logo). G1 uses Omron with a different date code format.
2. PCB etch: Near the backplane edge, look for “DS200LRPBG1AAA” copper etch. Relabeled boards grind off the original and silk-screen over it. Shine a bright light at an angle—you’ll see ghosting.
3. Capacitor C101: AAA uses a 100µF 35V Nichicon (blue sleeve). Earlier revs used a 47µF 50V (black sleeve).

My site has chronic failure on channel 14 of the G1A boards. Will the AAA fix this?
Probably. Channel 14 on the G1A shares a ground via with channel 13. When both conduct simultaneously, the return current causes a voltage drop that sometimes keeps relay K14 from latching. The AAA splits those vias. To be frank, we’ve seen this exact complaint from three combined-cycle plants. The AAA resolved it in all three cases.

What’s the typical failure mode on these AAA boards after 50,000 hours?
The DC-DC converter (U2, a Murata NME2405SC) cooks itself. Symptoms: intermittent resets, all LEDs flicker, or the board goes completely dark. You can replace U2 yourself—it’s a through-hole part, five-minute job with a soldering iron. We sell a repair kit with U2 and the four adjacent caps for $45.

How should I store a spare DS200LRPBG1AAA for emergency use?
Original anti-static bag. Flat storage only—vertical storage stresses the backplane connector over time. Every 12 months, power it up on a test bench for 24 hours. This reforms the electrolytic caps. If you skip this and store it for three years, expect a 15% failure rate on first power-up.

Do you offer any warranty on surplus DS200LRPBG1AAA boards?
One-year replacement warranty. Exclusions: physical damage, water intrusion, or soldering attempts. We run a 48-hour burn-in on every board before shipping—all 32 channels cycled every 10 minutes with a 100mA load. You get a printed test report with each board. If it fails in your rack within 12 months, we cross-ship a replacement. You pay return shipping on the failed unit.

Can this board drive a 24V DC solenoid directly without an interposing relay?
Check the solenoid’s inrush current. The relay contacts are rated for 2A steady-state, but solenoids can pull 5-8A for 50ms. If your solenoid draws more than 3A inrush, use an interposing relay. We’ve seen contact welding on channel 19 (the highest-wear position in the backplane scan order). When in doubt, add the interposing relay. It costs 12 and saves a 2,500 board.

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