DS200CVMAG3AEB | GE Speedtronic Vibration | In Stock

Description

Product Introduction

The GE DS200CVMAG3AEB is a high-density legacy vibration monitoring module for the Mark V Speedtronic turbine control system. It provides 8 vibration input channels with enhanced over-voltage protection, combining the channel density of the CVMAG1AEB with the legacy compatibility and ruggedness of the CVMAG3A.

Core advantage: The AEB revision packs 8 channels of ±10 V vibration monitoring into one slot, with ±30 V input protection (TVS diodes on every channel). Standard CVMAG1AEB (24-bit) has no over-voltage protection and fails with 24 V mis-wiring. The CVMAG3AEB survives field wiring mistakes. For legacy systems (firmware pre-v5.0) that need high channel density and rugged inputs, this is the only option. Field data shows this board has the lowest failure rate among all Mark V vibration modules (0.3% per year).

Key Technical Specifications

Key Selling Points & Differentiators

• 8 channels in one slot with rugged protection – Double density of CVMAG3A (4 channels). Survives 24 V mis-wiring. CVMAG1AEB has no protection.
• Compatible with all Mark V firmware versions – Works with R1 through R4 racks, firmware v3.x through v7.x. CVMAG1AEB requires v5.0+.
• TVS diodes on every input – 8 channels protected against 120 V transients. Standard CVMAG1AEB has no TVS.
• Additional 1 kHz filter option – Software-selectable for noisy environments. Not available on CVMAG3 (no filter option).
• Lower cost per channel than CVMAG3A – Approximately 40% less per channel than using two CVMAG3A boards.
• Live tested with 8-channel over-voltage sweep – We apply 24 V DC to all 8 inputs simultaneously for 1 hour. Board must recover and read correctly.
• 30-day warranty with cross-ship – MUX failure or channel protection failed? We send replacement same day.

Frequently Asked Questions (FAQ)

Q: What is the difference between DS200CVMAG3A (4-channel) and DS200CVMAG3AEB (8-channel)?
A: Channel count, sample rate, and simultaneous sampling. CVMAG3A: 4 channels, 10 kHz per channel, simultaneous sampling. CVMAG3AEB: 8 channels, 1.25 kHz per channel, sequential sampling (125 µs skew). For low-frequency vibration (0-500 Hz), AEB is sufficient. For high-frequency (1 kHz+) or orbit analysis (requires simultaneous sampling), use two CVMAG3A boards instead of one AEB.

Q: Can I replace two CVMAG3A boards with one AEB board?
A: Yes – wiring is different, but channel count matches (8 vs 4+4). However, the AEB has lower sample rate (1.25 kHz vs 10 kHz). For machines running below 10,000 RPM (166 Hz), 1.25 kHz sample rate is adequate (7.5x oversampling). For higher speeds, use separate CVMAG3A boards. The AEB is for slow-speed machinery or general monitoring, not high-frequency analysis.

Q: How do you test channel-to-channel skew on refurbished AEB boards?
A: We apply a 100 Hz sine wave to all 8 channels simultaneously (same signal). We measure the phase difference between channel 1 and channels 2-8. Skew must be <125 µs (4.5° at 100 Hz). About 10% of incoming AEB boards fail – the multiplexer has excessive switching delay. Those are repaired (replace mux IC).

Q: I see an AEB board with a blue sticker near the terminal block. What does that mean?
A: The blue sticker indicates the board received an additional “over-voltage recovery” test: we apply 30 V DC for 1 hour, then 5 V DC, and verify recovery within 0.01 V. Standard boards tested at 24 V only. Blue-sticker boards are for panels with known 24 V DC mis-wiring issues. We charge an extra $20 for blue-sticker boards.

Q: My AEB board shows low amplitude on channels 5-8 only. What failed?
A: The second input multiplexer (channels 5-8) has failed. The AEB uses two 4:1 muxes (ch 1-4 and ch 5-8). Repair cost is $165. We replace both muxes (ADG1408) and re-calibrate. Turnaround is 5 days.

Q: Can I mix AC and DC coupling on different channels?
A: Yes – coupling mode is software-selectable per channel. Channels 1-4: AC coupling (accelerometers). Channels 5-8: DC coupling (proximity probes). The AC coupling capacitor is per-channel.

Q: How do I identify a counterfeit DS200CVMAG3AEB?
A: Genuine boards have “CVMAG3AEB” printed on the edge connector label. The TVS diodes are SMCJ30CA (surface mount, 16 total – 2 per channel). Counterfeits often omit TVS diodes or use smaller (SMBJ) devices. Also check the mux chips: genuine uses ADG1408 (16-pin TSSOP, 2 total). Fakes use ADG1407 (8-channel, different pinout). We photograph the TVS diodes and muxes on every board.

Q: What is the maximum input voltage before the ADC saturates?
A: ±10 V nominal. With protection circuit, the ADC sees ±10 V (the protection clamps above ±10 V). For inputs up to ±30 V, the ADC saturates at ±10 V but is not damaged. For vibration monitoring, signals above ±10 V indicate a fault in the external conditioner.

Q: Does the AEB support order tracking?
A: No – the AEB has no tachometer inputs. It is for fixed-frequency sampling only. For order tracking, use CVMAG1A (4-channel, with tachometer) or CVMAG1ADB (isolated with tachometer). The AEB is for legacy systems where order tracking is not required or is done externally.

Q: What is the expected life of the input multiplexers?
A: The ADG1408 multiplexers are solid-state. Rated life >10 years. However, they are sensitive to ESD. Our refurbished boards include TVS diodes on the inputs (not original). The TVS protect the muxes. Without TVS, the mux may fail after a few ESD events.

Q: Can I use the AEB board with 4-20 mA vibration transmitters?
A: Yes – add a 250 Ω resistor across each input (convert 4-20 mA to 1-5 V). Scale in software. The AEB’s 50 kΩ input impedance will not load the resistor. The over-voltage protection protects the transmitter from accidental 24 V loops. For 8 channels, use a resistor bank (we sell for $35).

Q: Do you offer a version with conformal coating for offshore use?
A: Yes – special order DS200CVMAG3AEB-CC (acrylic coated). Lead time is 14-21 days. Cost adds 75. Coated version is recommended for offshore and coastal sites. The multiplexers are sensitive to moisture leakage (changes channel resistance). Coating prevents leakage. For offshore, also specify gold-plated terminal block (25 extra) for all connections. The AEB is often used on legacy offshore platforms where channel density is needed but firmware cannot be upgraded.

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