VT7971

Smart Charging Communication Test Module

The VT7971 is a dedicated module for testing smart charging communication according to ISO 15118. It can be used to test both electric vehicles (EV) and charging stations (EVSE).

Smart Charging Communication Module: VT7971 (based on a Vertexcom PLC Chip)

Characteristics:
VT7971

Module Features

  • Simulation of electric vehicle (EV) or/and electric vehicle supply equipment (EVSE)
  • Test of control pilot PWM communication (CP)

    • Circuit according to IEC 61851-1 Annex A
    • Stimulation and measurement of PWM signal via System Variables in CANoe
    • External stimulation and measurement of PWM signal is possible

  • Powerline communication (PLC)

    • Integrated Vertexcom Green PHY module
    • Ethernet connection to CANoe with RJ45 socket

  • Fault simulation of control pilot

    • Broken wire
    • Short circuit to protective earth (PE)

  • Simulation of component tolerances

    • Reproduction of capacitive load with integrated capacitance decade
    • Operation of relevant resistors with minimum, maximum and nominal values
    • Variation of PWM signal parameters (frequency, duty cycle, voltage)

  • Measurement of proximity contact (PP) voltage
  • Electrical isolation of application board against the remaining VT System
VT7971: detail view

Technical Data

VT7971 – based on a  Vertexcom PLC-Chip
Control pilot (CP) PWM stimulation
  Frequency (range / resolution) 900 Hz … 1.1 kHz / 0.1 Hz
  Duty Cycle (range / resolution) 1 % … 99 % / 0.1 %
  Voltage (range / accuracy) -15 V … 15 V /±1%
  Rise / Fall time (w/o PLC coupler, no load) Max. 2 µs
Control pilot (CP) PWM measurement
  Frequency (range / resolution) 900 Hz … 1.1 kHz / 0.1 Hz
  Duty Cycle (range / resolution) 0 % … 100 % / 0.1 %
  Voltage (range / accuracy) -15 V … 15 V / ±1%
Proximity pilot (PP) voltage measurement
  Range 0 … 5 V
  Accuracy ±1%
Error Simulation
  Capacitive load (Cs, Cv)  
  – Range 0 … 6.3 nF
  – Step width 100 pF
  Resistance tolerances (R1, R2, R3)  
  – Adjustable values Nom. value, Nom. value +3%, Nom. value -3%
Basic Data
  Supply voltage (via backplane) 12 V ±10 %
  Power consumption Typ. 7.7 W
  Temperature range 0 … 55 °C
  Dimensions (L x W x H) 300 x 173 x 36 mm
  Weight Approx. 500 g

Schematic

Schematic of the VT7971: EVSE simulation
Schematic of the VT7971: EV simulation

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