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The GE DS200NATOG2A DS200NATOG2ADB feedback scaling board conditions sensor signals for GE Mark V control systems. This board amplifies and filters low-level transducer outputs before analog-to-digital conversion. You will find this scaling board in turbine control cabinets and drive feedback loops. Its programmable gain accommodates many sensor types.
Signal Conditioning Architecture
This feedback scaling board provides eight programmable analog input channels. Consequently, you can match each channel to a different sensor type. The GE DS200NATOG2A DS200NATOG2ADB amplifies millivolt signals from thermocouples and LVDTs. Moreover, built-in low-pass filters remove high-frequency noise. You can configure gain settings through software without removing the board.
Technical Specifications
| Parameter | Value |
|---|---|
| Input Channels | 8, differential |
| Input Signal Range | ±10mV to ±10V (programmable gain) |
| Programmable Gains | 1, 2, 5, 10, 20, 50, 100, 200, 500, 1000 |
| Accuracy | ±0.1% of full scale |
| Input Impedance | 10 MΩ (all gain settings) |
| Low-Pass Filter | 100 Hz, 500 Hz, 1 kHz (selectable) |
| Common Mode Rejection | 100 dB minimum at 60 Hz |
| Dimensions | 190mm x 140mm x 25mm |
| Weight | 0.45 kg (0.99 lbs) |
| PCB Layers | 6 |
| Onboard Components | 8 instrumentation amps, 8 filters, 1 precision reference |
| Connector Count | 3 (sensor input, backplane, calibration) |
| Status Indicators | 1 LED (power good) |
| Energy Storage | 1000 µF (power supply filtering) |
| Offset Drift | ±1 µV/°C maximum |
| Gain Drift | ±5 ppm/°C |
| Operating Temperature | 0°C to +50°C |
| Storage Temperature | -20°C to +70°C |
Gain Configuration and Filtering Options
The unit includes eight high-performance instrumentation amplifiers. Therefore, it preserves signal integrity even at maximum gain. This board replaces the DS200NATOG2ADB version without any calibration changes. Simply remove the old board and install this one. GE designed this scaling board for single-slot installation. Hence, it fits directly into existing Mark V rack positions.
Six PCB layers separate analog and digital signal paths effectively. Three connectors handle all sensor, backplane, and calibration signals. The GE DS200NATOG2A DS200NATOG2ADB also includes a precision voltage reference for self-calibration. Accordingly, it maintains accuracy over temperature and time. This feature proves essential for turbine speed and position feedback.
Calibration and Sensor Compatibility
You must perform an auto-calibration routine after installing this board. The onboard reference provides 2.5V and 5V for gain verification. The GE DS200NATOG2A DS200NATOG2ADB stores calibration constants in EEPROM memory. Consequently, it retains settings even after power loss. A single green LED indicates that the board has power.
Always use shielded twisted-pair cable for sensor connections. Connect the shield only at the board end for best noise rejection. The GE DS200NATOG2A DS200NATOG2ADB works with thermocouples, RTDs, LVDTs, and strain gauges. Proper grounding of the analog common prevents measurement errors. This board operates reliably in non-condensing environments.