3VL molded-case circuit breaker
4.1 Brief description
3WL/3VL circuit breakers with communication capability - PROFIBUS
88 System Manual, 03/2011, A5E01051353-02
System architecture
The system architecture of the SENTRON VL allows communication via PROFIBUS DP to a
notebook or via Ethernet/intranet/Internet. A shared PROFIBUS profile together with the
SENTRON WL enables use of shared programs both in a PLC and on a PC.
PROFIBUS
① PLC, e.g. SIMATIC S7
② PC
③ COM20
④ COM20 from Release 2
⑤ SENTRON VL with ETU
⑥ SENTRON VL with LCD ETU
Figure 4-1 System architecture of the SENTRON VL
4.1.2 Overview of the accessories
There is a host of accessories available for the SENTRON VL circuit breakers. There are:
● External accessories, e.g. overcurrent release, PROFIBUS DP module COM20, and front
rotary operating mechanism. External accessories are mounted outside the
SENTRON VL.
● Internal accessories, e.g. alarm switches, shunt releases. Internal accessories are
mounted inside the SENTRON VL under the front plate in "compartments". This means
no additional space is required. The compartments are located to the left and right of the
toggle handle. It must be noted here that certain internal accessories must only be
mounted in certain compartments (see the paragraph "Installing components in the
accessory compartments")!
The figure below shows an overview of the accessories of the SENTRON VL:
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