GE DS200NATOG2A Voltage Feedback Scaling Board

The GE DS200NATOG2A, also cataloged as the DS200NATOG2A Voltage Feedback Scaling Board, operates as a dedicated hardware component for voltage attenuation and feedback scaling within GE LCI Innovation drive control systems. The board processes AC and DC bridge voltages from SCR power conversion circuits and provides scaled feedback signals required for control, monitoring, and power regulation functions.

Hardware Specifications

Voltage Scaling and Feedback Processing

The DS200NATOG2A is designed to attenuate high-energy AC and DC voltages associated with SCR bridge assemblies. The board converts incoming voltage signals into scaled feedback values suitable for downstream control circuitry.

Five precision resistor strings are provided for voltage measurement functions. Three resistor strings are assigned to the incoming AC phases, while the remaining two strings monitor positive and negative DC bus voltages. Through configurable stab connectors and jumper selections, each resistor network can be adapted for several predefined voltage ranges.

The scaled outputs from all resistor strings are routed through a common 20-pin ribbon header. A dedicated MOV protection device is installed on each feedback path to limit excessive output voltage conditions that could occur if the ribbon connection is interrupted while voltage remains present at the board inputs.

Deterministic Control System Integration

Within the LCI Innovation architecture, the DS200NATOG2A operates with a VME backplane and a gate distribution and status board. The board performs passive scaling rather than active control processing, allowing downstream control electronics to receive conditioned voltage feedback for drive regulation and system supervision.

The burden resistor is located on the associated gate distribution and status board rather than on the DS200NATOG2A itself. This architecture separates voltage attenuation functions from subsequent signal processing and control tasks.

Frequently Asked Questions

Q: What voltages can be configured on the DS200NATOG2A?
A: The board supports attenuation configurations for 6900 V, 4200 V, 3300 V, 2200 V, and 1200 V input levels.

Q: How many voltage feedback channels are provided?
A: The board contains five resistor strings used for three AC phase measurements and positive and negative DC bus voltage monitoring.

Q: How is overvoltage protection implemented on the outputs?
A: Each output path is protected by a metal oxide varistor (MOV) that limits excessive output voltage if the output ribbon circuit becomes disconnected while input voltage remains present.

Field Installation Guidelines

• Verify voltage tap selection before energization.

• Confirm stab connector placement matches system voltage.

• Inspect ribbon cable connections before startup.

• De-energize the SCR bridge before servicing the board.

• Verify jumper configuration against application requirements.