User's Manual
User Manual VC-EVCC
© 2021 Vector Informatik GmbH Version 1.3.0 223
Diagnostics: Open Load (limited for V
Bat
< 22V)
Short to ground (limited for V
Bat
< 22V)
Short to battery
Diagnosis is only possible during on state. Furthermore, the following conditions are
mandatory in order to ensure all diagnostic functionalities of the LED outputs.
Minimum voltage drop at the LED (including external circuit): 5V
Maximum voltage drop at the LED (including external circuit): V
BAT
– 3V
Maximum voltage drop at the LED (including external circuit): 14V
Note
The maximum voltage drop depends on the system’s power supply voltage. In 24V
systems the maximum voltage drop at the LED is 14V. In 12V systems the maximum
voltage drop at the LED is V
Bat
– 3V.
The following figure shows the schematic of the LED outputs.
Figure 6-3: LED Outputs Schematic
Caution
The circuit of the LED outputs is designed for the usage of an external LED and a
series resistance. Illuminants with internal constant current sources are not supported.
Please note that the VC-EVCC has a separate ground pin (pin 4E) for the LED outputs.