ALSTOM MAE99-04

ALSTOM MAE99-04

Product Introduction MAE99-04 is an analog output board for Alstom power protection and control systems from ALSTOM of France, a 4 to 20 mA output module for protection devices. The board converts protection device measured values into 4 to 20 mA analog outputs driving external recorders and indicating instruments. It is inserted inside the protection device for analog output in substation and plant protection systems.

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Description

ALSTOM MAE99-04

Technical Specifications

  • Product type: Analog output board
  • Output channels: 4 × 4 to 20 mA
  • Load capability: Max 750 Ω
  • Output accuracy: 0.5 % FS
  • Supply: Device internal DC24V
  • Isolation: Output isolated from device internals
  • Temperature: -10 °C to +55 °C
  • Storage: -25 °C to +70 °C
  • Humidity: 5 % to 95 %, non-condensing
  • Protection: IP20
  • Installation: Internal plug-in
  • Response time: 100 ms

Functional Features

  • 4-channel 4 to 20 mA analog output
  • External recorder drive of protection measurements
  • Output loop wire-break detection
  • Output isolated from device internals
  • On-board LEDs per channel
  • Channel span software configurable
  • Board-to-board communication with CPU
  • Industrial-grade components
  • Substation EMI environment
  • Modular plug-in

Application Scenarios

  • Substation protection device analog output
  • Plant protection measurement remote transmission
  • Recorder and indicator drive
  • Power fault recorder external output
  • Substation integrated automation analog output

Materials and Construction

  • PCB: FR4 board
  • Output: High-precision DAC, V/I circuit
  • Isolation: Optocouplers
  • Connector: Board-to-board
  • Terminals: Screw-fastened terminals
  • Passive components: Metal film resistors, TVS

Structural Features

  • Small PCB in protection device analog output slot
  • Front panel 4-channel output terminals
  • On-board LEDs
  • Board-to-board connector to CPU
  • No independent housing
  • Compact

Working Principle The protection CPU sends 4 to 20 mA setpoints over the board-to-board bus; the DAC converts to voltage, and the V/I circuit produces 4 to 20 mA current to external recorders. Output loop monitoring detects current to identify wire-break. LEDs indicate channel status. Span is configured by software.

Installation Requirements

  • Insert output slot with device power off
  • Shielded twisted pair output wire
  • Do not short output
  • Device grounding
  • Temperature -10 °C to +55 °C
  • Configure output span in device menu after power-up

Precautions

  • Insert/remove only with device power off
  • Do not short output loop
  • Load resistor must not exceed 750 Ω
  • Store spares in anti-static packaging
  • Calibrate output after software replacement
  • Periodically calibrate output accuracy

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