The function of DS200NATOG1A/G2A/G3A GE Mark V Voltage Feedback Scaling Board

Time:Dec 03,2025

The primary function of a voltage feedback scaling board is to precisely scale, attenuate, and isolate high-voltage DC or AC signals acquired from the system, converting them into low-voltage signals suitable for subsequent control circuit processing. This ensures the system can prevent overvoltage based on accurate signal feedback, enabling stable system control. Essentially, a voltage feedback scaling board is a signal conditioning module in an industrial control system. Its working principle typically involves proportional voltage scaling through a precise resistor divider network.

Voltage feedback scaling boards are applicable to industrial fields with extremely high requirements for control precision and reliability, such as in gas/steam turbine control systems like GE's Speedtronic Mark V. They can also be used for precise control of the speed and torque of large motors, in excitation control systems of steam turbine generator sets, stabilizing grid voltage, and in complex industrial processes such as water treatment, mining, high-speed packaging, and material handling.

Typical voltage feedback scaling board models from GE belong to its Mark V series, mainly including the following:

1. DS200NATOG1A, basic voltage feedback scaling board.

2. The DS200NATOG2A is an improved version of the G1, differing in its resistor network design (e.g., replacing some resistors with jumpers). It typically works in conjunction with the gate distribution status board and VME backplane to attenuate the voltage across the SCR (Silicon Controlled Rectifier) bridge.

3. The DS200TVCOG3A places greater emphasis on electrical isolation, offering superior overvoltage protection.

When selecting a model, key factors to consider include the input voltage range, scaling factor (attenuation coefficient), output signal type, isolation level, and compatibility with existing systems (such as specific VME backplanes).

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