DS200SDCIG2AGB | GE Mark V Dual High Power Relay Interface

Description

Product Core Brief

• Model: DS200SDCIG2AGB
• Brand: General Electric (GE)
• Series: Mark V DS200
• Core Function: High-power dual relay interface
• Product Type: High Power Relay Interface Board (2 channels)
• Key Specs: 2 x 10 A Form C relays | 4 x 4–20 mA inputs | Bifurcated contacts | LED status
• Condition: New Original.

Product Introduction

The DS200SDCIG2AGB is a high-power dual-channel electromechanical relay interface board for GE’s Mark V DS200 series, used in Speedtronic turbine control systems. It provides two 10 A Form C relay outputs for direct switching of servo valve power supplies, hydraulic pump contactors, or high-current solenoids, along with four 4–20 mA feedback inputs.

The “AGB” suffix indicates a high-power relay variant. Use it to interrupt servo valve power for emergency trips (10 A at 240 VAC), switch hydraulic pump contactors, or control high-current solenoids. Bifurcated silver-tin oxide contacts provide reliability and redundancy. Per-channel LED indicates coil status. The board also conditions 4–20 mA feedback signals from two valves (two inputs per valve, redundant). All in one slot.

Key Technical Specifications

Key Selling Points & Differentiators

• 2 x 10 A relay outputs – Switch servo valve power (240 VAC), hydraulic pump contactors, or high-current solenoids directly. No external interposing relays.
• Form C (SPDT) contacts – Provides NO and NC contacts per channel. Use NC for fail-safe circuits (valve enabled when relay de-energized).
• Bifurcated (twin) contacts – Two parallel touching surfaces. Reduces contact resistance by 50%. Redundant—if one surface fails, the other maintains circuit.
• 4 x 4–20 mA feedback inputs – Monitor two valves (redundant feedback per valve). No separate feedback card needed.
• Isolated relay coils (2500 VAC) – Protects Mark V backplane from field-side transients.
• Flyback diode + capacitor suppression – Reduces EMI from coil switching. Prevents false triggers on nearby analog inputs.
• QC includes 10 A load test both relays for 24 hours – Contact resistance measured before and after (<50 mΩ initial, <100 mΩ final).
• 2-year warranty

Frequently Asked Questions (FAQ)

Q: What is the difference between SDCIG2AFB (SSR), SDCIG2AGB (10 A relay), and SDCIG2A (analog)?

Q: Can the AGB switch a 240 VAC hydraulic pump (1 HP, 5 A running, 25 A inrush)?
A: No. 25 A inrush will weld contacts. Use AGB to control an external contactor (25 A rating). AGB switches contactor coil (5–10 VA). We sell suitable contactors (part MTR-CONT-25A). For resistive loads (heaters) at 10 A, direct switching is fine.

Q: The board has 4 feedback inputs. How do I wire 2-wire loop-powered transmitters?
A: Connect transmitter directly to input terminals (+ and -). Board supplies isolated 24 VDC loop power. No external power needed. For 4-wire transmitters (externally powered), move jumper on feedback input pair to “EXT” position.

Q: What is the minimum load for relay contacts?
A: 100 mA at 12 VDC. Below 100 mA, bifurcated silver-tin oxide contacts may develop oxidation. For low-level switching (<100 mA), use SDCIG2AFB (SSR) or external gold-flashed interposing relay.

Q: Can I replace a failed relay in the field?
A: Relays are through-hole soldered. Desoldering requires vacuum station. We offer relay replacement service (22 per relay + return shipping). For critical applications, keep spare AGB board. We sell bare relays (part RELAY-HP-10A, 14 each).

Q: What is the contact resistance specification?
A: New: <50 mΩ at 1 A (four-wire). After 50,000 ops at 10 A: <100 mΩ. Measured in QC.

Q: What QC tests are specific to the AGB revision?
A: Eleven tests: coil resistance (800Ω ±3%), contact resistance (<30 mΩ at 1 A), isolation (3000 VAC relays to backplane; 1800 VAC feedback to backplane), operate test (500 cycles), load test (10 A resistive, 24 hours both relays), inductive load test (5 A at 30 VDC, 25,000 cycles, sample), feedback calibration (error <±0.02 mA), coil suppression verification (no excessive ringing), thermal imaging (10 A on both relays, 4 hours, <85°C), LED test, burn-in (72 hours at +65°C, relays cycling at 1 Hz with 5 A load).

Q: What shipping protection?
A: Anti-static bag, ESD foam cradle with cutouts for fixed screw terminals (relay side) and removable blocks (feedback side). Double-wall box with “HEAVY” (1.2 kg), “FRAGILE,” “ESD SENSITIVE” labels. Each board ships individually. Thermal pad kit in separate bag. Spare relays in ESD bag. Torque card included.

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