DS200SHVIG1A | GE DS200 Valve Positioner With PI In Stock

Description

Product Core Brief

• Model: DS200SHVIG1A
• Brand: General Electric (GE)
• Series: Mark V DS200
• Core Function: Enhanced servo valve interface with auto-tuning PI
• Product Type: Enhanced Servo Valve Driver (1 channel, A revision)
• Key Specs: 0–200 mA output | 4–20 mA feedback | Auto-tuning PI | Removable terminals
• Condition: New Original.

Product Introduction

The DS200SHVIG1A is an enhanced servo valve interface board for GE’s Mark V DS200 series, used in Speedtronic turbine control systems. It combines a 0–200 mA current output with a 4–20 mA position feedback input and an auto-tuning PI controller, all with removable terminals and improved signal conditioning.

The “A” revision of the SHVIG1 adds removable screw terminals (original had fixed), enhanced common-mode filtering (60 dB vs 40 dB), auto-tuning PI (push-button), improved ESD protection (±15 kV), and extended temperature range (−40°C to +70°C). The auto-tuning feature automatically measures valve dynamics and sets P and I gains—no oscilloscope required. Use it for standalone valve positioning in retrofits, test stands, or non-critical turbine valves.

Key Technical Specifications

Key Selling Points & Differentiators (A Revision Specific)

• Auto-tuning PI controller – Push-button tuning. Board applies step, measures valve response, calculates optimal P and I gains. No oscilloscope, no guesswork. Tunes in 30 seconds.
• Removable terminal blocks – Original had fixed terminals. Replace damaged block without unwiring.
• Enhanced common-mode filtering (60 dB) – Original had 40 dB. Critical for long setpoint cable runs.
• Improved ESD protection (±15 kV contact) – Meets IEC Level 4.
• Auto-zero push-button – Removes output offset at 0 mA. No potentiometer adjustment needed.
• Extended temperature range (−40°C to +70°C) – Operates in unheated enclosures.
• Torque card included – Laminated card with torque settings.
• QC includes auto-tuning verification – Tunes a simulated valve, verifies gains within expected range.
• 2-year warranty

Frequently Asked Questions (FAQ)

Q: What is the difference between SHVIG1 (base) and SHVIG1A (A revision)?

Q: How does auto-tuning work?
A: Press and hold the “TUNE” button for 2 seconds. Board applies a 10% step to the valve output (open loop). It measures the position feedback response: deadband (stiction), time constant, and ultimate gain. Calculates P = 0.5 * ultimate gain, I = time constant. Stores gains in EEPROM. LED flashes during tuning (30 sec). Do not touch valve during tuning. Works for valves with 0.1–10 second time constants.

Q: Can I use auto-tuning on a valve that is already in service?
A: Not recommended. Auto-tuning applies a 10% step, which will move the valve. For in-service valves, use manual tuning (potentiometers) to avoid process disturbance. Use auto-tuning during commissioning or maintenance outages.

Q: What is the auto-zero feature?
A: Press “ZERO” button. Board measures output current, adjusts internal offset to achieve 0 mA (with 0 V or 4 mA setpoint). Removes any potentiometer drift or thermal offset. Takes 1 second. Use after warm-up (15 minutes) for best accuracy.

Q: What is the input impedance for 4–20 mA setpoint?
A: 250Ω (precision burden). Max voltage 5 V at 20 mA. CMRR 60 dB rejects common-mode noise on long setpoint cables (up to 2000 ft).

Q: Does the SHVIG1A require an external 24 VDC power supply?
A: Recommended for output >100 mA. At 200 mA output, board draws 1.5 A. Backplane 24 VDC is typically limited to 1 A. Use external 24 VDC supply rated 3 A minimum (we sell ACC-PS-24V-3A). For low-current applications (<100 mA), backplane power may suffice.

Q: What QC tests are specific to the SHVIG1A?
A: Eleven tests:

1. Auto-tuning verification: tunes simulated valve, gains within 10% of expected
2. Auto-zero verification: offset <0.5 mA after zeroing
3. Open loop tests (linearity, offset, gain, dither)
4. Closed loop step response: 10% to 90%, settling time <200 ms, overshoot <10%
5. Setpoint input accuracy: 4–20 mA and 0–10 V modes
6. Feedback input accuracy: 4–20 mA
7. CMRR: 60 dB at 60 Hz
8. ESD test: ±15 kV contact
9. Short-circuit and thermal protection
10. Isolation: input-to-output at 1800 VAC
11. Burn-in: 72 hours at +65°C, closed loop mode with simulated valve, auto-tuning re-verified

Q: What shipping protection?
A: Anti-static bag, ESD foam cradle, double-wall box with “ESD SENSITIVE,” “FRAGILE” labels. Each board ships individually. Removable terminal blocks pre-installed. Auto-tuning push-button tool included. Spare terminal blocks in separate bag. Torque card included. Configuration guide (including auto-tuning procedure) included. Spare fuse included. External power supply not included (order separately)

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