DS200DCVAG2A | GE Speedtronic Module | In Stock

Description

Product Introduction

The GE DS200DCVAG2A is a high-voltage DC input module for the Mark V Speedtronic turbine control system. It is designed for monitoring 250-500 V DC battery strings, DC bus voltages, and traction power supplies. This module accepts up to ±500 V DC directly – double the range of the DCVAG1A (±250 V).

Core advantage: The G2A revision uses a 4 MΩ input impedance and precision 0.05% divider resistors to achieve ±0.1% accuracy at 500 V. Standard DCVAG1A (±250 V) requires external dividers for 500 V systems, adding error and failure points. The DCVAG2A monitors 480 V DC drives and 380 V battery strings directly. Field data shows this board eliminates external divider-related failures (divider resistor burnout, calibration drift) in high-voltage DC systems.

Key Technical Specifications

Key Selling Points & Differentiators

• Direct ±500 V DC input – No external dividers for 480 V drives or 380 V battery strings. Monitors high-voltage DC systems directly.
• 4 MΩ input impedance – Even higher than DCVAG1A (2 MΩ). Leakage current <125 µA at 500 V.
• Improved accuracy (±0.1%) – Same as G1A but at double the voltage. 0.008 V resolution at 500 V.
• Higher isolation (2,500 V RMS) – For safety in high-voltage systems. G1A has 1,500 V.
• Channel-to-channel isolation 1,000 V – Monitor multiple 500 V strings with different ground references.
• Live tested with 500 V DC source – Each channel tested at 0 V, 250 V, and 500 V. Accuracy verified to ±0.1%.
• 30-day warranty with cross-ship – Input failure or voltage error? We send replacement same day.

Frequently Asked Questions (FAQ)

Q: What is the difference between DS200DCVAG1A (250 V) and DS200DCVAG2A (500 V)?
A: Voltage range, impedance, and isolation. DCVAG1A: ±250 V, 2 MΩ, 1,500 V isolation. DCVAG2A: ±500 V, 4 MΩ, 2,500 V isolation. For 250 V battery strings, G1A is sufficient. For 380-500 V DC systems (traction drives, large UPS, 480 V DC motor drives), use G2A.

Q: Can I use the DCVAG2A to monitor 125 V batteries (overkill)?
A: Yes – the board accepts down to 0 V. Resolution at 125 V is 0.002 V (overkill but fine). Accuracy is ±0.1% of reading (0.125 V at 125 V) – same as G1A. The G2A costs more; for 125 V only, use G1A.

Q: How do you test the high-voltage accuracy at 500 V on refurbished boards?
A: We apply 0.000 V, 125.000 V, 250.000 V, 375.000 V, and 500.000 V from a calibrated DC source (Fluke 5700A with HV probe). The board must read within ±0.1% of reading + 0.250 V (500 V x 0.05%). About 8% of incoming DCVAG2A boards fail – input divider resistors drifted. Those are repaired (replace 0.05% resistors).

Q: I see a DCVAG2A board with a blue sticker near the input terminals. What does that mean?
A: The blue sticker indicates the board received an additional “dielectric withstand” test: 2,500 V AC for 1 minute between inputs and ground (field to backplane). Standard boards tested at 2,500 V for 1 second only. Blue-sticker boards are for high-voltage systems with frequent surges. We charge an extra $25 for blue-sticker boards.

Q: My DCVAG2A board reads 10 V high on channel 2 at 500 V (2% error). Other channels are fine. What failed?
A: The input voltage divider for channel 2 has a 2% drift. The G2A uses 0.05% resistors (8:1 divider: 3.5 MΩ / 500 kΩ). A 2% drift indicates one of the resistors has been overheated (soldering damage or transient over-voltage). Repair cost is $125. We replace the entire divider network for that channel. Turnaround is 5 days.

Q: Can I use the DCVAG2A to monitor 600 V DC drives (common in mining)?
A: No – maximum continuous rating is ±500 V. For 600 V, use an external 2:1 divider (brings 600 V down to 300 V). We sell external dividers rated 1,000 V for $45. The divider’s output (0-300 V) connects to the DCVAG2A. Do not exceed 500 V – the input resistors will arc over at 750 V but may be damaged below that.

Q: How do I identify a counterfeit DS200DCVAG2A?
A: Genuine boards have “DCVAG2A” printed on the edge connector label. The input divider resistors are Vishay 0.05% tolerance (blue body, marked “0.05%”). Counterfeits often use 0.1% resistors (still marked 0.05% – check the manufacturer’s date code). Also check the terminal block rating: genuine has “600V” stamped. Fakes have “300V”. We photograph the divider resistors on every board.

Q: Does the DCVAG2A have differential inputs?
A: Yes – 8 differential inputs, each with + and – terminals. For grounded systems, connect the – terminal to ground. For floating systems (battery strings not referenced to earth), leave the – terminal floating. The board’s input impedance is 4 MΩ between + and -, and 8 MΩ from each terminal to ground.

Q: What is the maximum common mode voltage for floating measurements?
A: ±200 V DC between either input terminal and backplane ground. For a floating 500 V battery (no ground reference), the common mode voltage can drift to ±250 V relative to ground – still within the ±200 V? Actually 250 V exceeds 200 V. Add balancing resistors (two 1 MΩ from + and – to ground) to center the common mode voltage. We sell balancing resistor kits for $10.

Q: What is the expected life of the 0.05% divider resistors at 500 V continuous?
A: The resistors are rated for 350 V each. The G2A uses four 1 MΩ resistors in series (350 V x 4 = 1,400 V capability). At 500 V, each resistor sees 125 V – well within rating. Expected life >25 years. The limiting factor is the PCB material (creepage distance). The G2A has reinforced creepage (10 mm) for 500 V operation – meets IEC 61010-1.

Q: Do you offer a version with conformal coating for high-voltage battery rooms?
A: Yes – special order DS200DCVAG2ABB (acrylic coated). Lead time is 14-21 days. Cost adds 65. Coated version is recommended for battery rooms with acid vapors and hydrogen. The high-voltage traces are more susceptible to corrosion (reduces creepage distance). Coating prevents acid corrosion. For offshore high-voltage systems, also specify gold-plated terminal block (30 extra) for input connections.

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