3VL molded-case circuit breaker
4.1 Brief description
3WL/3VL circuit breakers with communication capability - PROFIBUS
System Manual, 03/2011, A5E01051353-02
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4.1.6
Data transfer via PROFIBUS DP
There are two options for transferring data of the SENTRON VL circuit breaker over
PROFIBUS DP: via COM20, or via SIMOCODE-DP. The versions differ primarily with regard
to data volume, flexibility, and installation costs.
Connection via the COM20 module
The COM20 module is connected to the ETU of the SENTRON VL. All the available data
(see table below) is read from the trip unit and made available on the bus via this connection.
This option provides a direct communication link between the SENTRON VL and PROFIBUS
DP. The SENTRON VL circuit breaker must be equipped with a communication-enabled
ETU for connection to the COM20.
Connection via SIMOCODE-DP
The alternative via SIMOCODE-DP represents an indirect communication link to the
SENTRON VL. There is no direct communication link to the trip unit.
The maximum current is calculated by the transformer integrated into SIMOCODE-DP and
transmitted as a percentage of the current setting. The circuit breaker statuses are applied to
PROFIBUS DP via the SIMOCODE-DP inputs by means of the auxiliary and alarm switches.
The outputs of SIMOCODE-DP can be used to switch the breaker on and off via an optional
motorized operating mechanism. Alarms and error messages from the circuit breaker are not
transferred.