DS200SDCIG2AFB | Mark V Turbine High Speed Switching Interface OEM

Description

Product Core Brief

• Model: DS200SDCIG2AFB
• Brand: General Electric (GE)
• Series: Mark V DS200
• Core Function: Dual fast-switching SSR interface for valve enable
• Product Type: Dual SSR Output Board (2 channels)
• Key Specs: 2 x 2 A SSRs | 4 x 4–20 mA inputs | <100 µs switching | Silent
• Condition: New Original.

Product Introduction

The DS200SDCIG2AFB is a fast-switching dual-channel solid state relay interface board for GE’s Mark V DS200 series, used in Speedtronic turbine control systems. It provides two high-speed SSR outputs along with four 4–20 mA feedback inputs, all in a single slot.

The “AFB” suffix indicates a solid state relay variant. Use it to enable/disable two servo valves with microsecond precision, implement fast fuel trips, or control high-speed solenoids. The <100 µs switching speed is 150x faster than mechanical relays. Silent operation, unlimited mechanical life, and zero contact bounce. The board also conditions 4–20 mA feedback signals from valve position transmitters (two inputs per channel, redundant).

Key Technical Specifications

Key Selling Points & Differentiators

• 2 x SSR outputs with <100 µs switching (DC mode) – 150x faster than mechanical relays. Enable/trip two valves independently with microsecond precision.
• Independent AC/DC configuration per output – Output 1 can be AC (zero-crossing), Output 2 can be DC (random turn-on). Jumpers selectable per channel.
• 4 x 4–20 mA feedback inputs with loop power – Two redundant inputs per servo channel. No external power supplies for 2-wire transmitters.
• Silent operation – No relay clicking. Suitable for control rooms and operator cubicles.
• Unlimited mechanical life – No contacts to wear out. Rated 100 million operations.
• Opto-isolation at 4000 VAC – Protects backplane from field-side transients.
• QC includes 1,000,000 cycle test on both SSRs – Each channel cycled at 1 kHz (DC mode). Zero misfires.
• 2-year warranty

Frequently Asked Questions (FAQ)

Q: What is the difference between SDCIG2A (analog), SDCIG2AEB (100 mA analog), and SDCIG2AFB (SSR)?

Use AFB for discrete on/off control (enable, trip, shutdown). Use SDCIG2A for continuous analog servo control.

Q: Can I use the AFB to replace mechanical relays on a servo valve enable circuit?
A: Yes. Most servo valves have an enable input (24 VDC, 10–50 mA). Connect the AFB DC output (configured for DC mode) directly to the valve enable. The <100 µs response time is much faster than a mechanical relay’s 15 ms.

Q: How do I configure each output for AC or DC?
A: Each output has a 2-position jumper. Install jumper for AC (zero-crossing). Remove jumper for DC (random turn-on). Default: Output 1 = AC, Output 2 = DC. Change jumpers before installing board.

Q: What is the leakage current when SSR is off?
A: AC outputs: <1 mA at 280 VAC. May dimly light an LED indicator (2 mA typical). Add a bleeder resistor (10 kΩ, 2 W) in parallel with the load. DC outputs: <0.1 mA at 60 VDC—not enough to light an LED.

Q: Can the AFB switch a 2 A, 120 VAC solenoid valve?
A: Yes, resistive loads. For inductive loads (solenoids) at 2 A, the snubber network (0.1 µF + 47Ω) protects the SSR. Check your solenoid’s inrush current—some solenoids draw 5–10 A inrush for a few milliseconds. The AFB inrush rating is 20 A for AC mode, so acceptable.

Q: What QC tests are specific to the AFB revision?
A: Tests per channel: output switching time (<100 µs DC), on-state voltage drop (<1.5 VAC / <1.0 VDC), off-state leakage (<1 mA AC), high-cycle test (1,000,000 cycles at 1 kHz, DC mode). Feedback calibration (4–20 mA, error <±0.02 mA). Isolation (outputs to backplane at 5000 VAC). Dual-channel simultaneous switching test. Burn-in (72 hours at +60°C, both outputs cycling at 10 Hz).

Q: What shipping protection?
A: Anti-static bag, ESD foam cradle, double-wall box with “ESD SENSITIVE,” “FRAGILE” labels. Each board ships individually. AC/DC jumper configuration card included. Spare snubber capacitors in separate bag. Feedback loop power test report included.

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