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Technical information
and start-up
BSC624-12V-B
7.1.10 Pin 19 IL1, pin 20 IL2
INSTRUCTION
In order to guarantee the functioning of the interlock, the signal of the internal interlock identification
in the HV connector may not be modified or distorted!
INFORMATION
The interlock is a safety-relevant function, which is processed internally but can also be analysed via
an upstream system (e.g.: vehicle system). The interlock connection is looped via the HV connector
(bridge in the HV customer side connector) and thus enables to check whether or not this connector
is properly connected. The device has two independent interlock monitoring circuits:
internal interlock identification
external interlock identification
Internal wiring
The internal interlock identification works independently from the usage of the external interlock identification
and it exclusively monitors whether or not the HV connector is properly connected. In the case of an error, the
signal
INTL_OC_int*
is set and the error
CRE_INTERLOCK
is emitted via CAN. For safety reasons, the
internal interlock identification cannot be deactivated.
By using the external interlock identification, not only the HV connector of the respective device but also those
of additional devices can be checked.
For this purpose, the customer must feed in the interlock signal in the form of a DC current of at least
20 mA at pin 19 and / or pin 20. Here, the polarity is not relevant. To avoid damaging the internal resistor
and optocoupler, the DC current must be limited to a maximum of 40 mA.
By means of the PARAM software, it is to be checked whether or not the external interlock identification
has been activated and corrected if applicable.
If one of the monitored connectors is not contacted correctly, the loop is open and the input current can no
longer flow. If a threshold of approx. 15 mA is undercut, the signal
INTL_OC_ext*
is set, while the error
CRE_INTERLOCK
is emitted via CAN.
The identification of the internal and external interlock error – provided that the latter is activated – leads to an
immediate shut-down of the device.
By means of the PARAM software, it can be determined whether an existing interlock error has been detected
