3VL molded-case circuit breaker
4.2 COM20 connection
3WL/3VL circuit breakers with communication capability - PROFIBUS
System Manual, 03/2011, A5E01051353-02
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4.2.6
Communication connection to the ETU
The next page contains a description of how to establish the communication link between the
COM20 and the SENTRON VL with ETU.
The ON/OFF position (auxiliary switch), and the triggered signal (alarm switch) of the switch
are signaled via the wiring of the ETU. The auxiliary and alarm switches are supplied with
the communication-capable ETU. You can find details in the operating instructions for the
communication-capable, solid-state overcurrent trip unit (ETUs).
Different communication cables must be used depending on which SENTRON VL circuit
breaker is used. A 1.5 m connecting cable is included with the communication-capable ETU.
These cables are listed with their different lengths and switch assignments in the table
below. They can be ordered as accessories.
Table 4- 2
Communication cables available for order
3VL9000-8AQ60
3VL4 - 1.5 m
JG - 59.05 in.
3VL9000-8AQ61
3VL4 - 3 m
JG - 118.1 in.
3VL9000-8AQ70
3VL5 / 3VL6 / 3VL7 / 3VL8 - 1.5 m
LG / MG / NG / PG - 59.05 in.
3VL9000-8AQ71
3VL5 / 3VL6 / 3VL7 / 3VL8 - 3 m
LG / MG / NG / PG - 118.1 in.
3VL9000-8AQ80
3VL2 / 3VL3 - 1.5 m
DG / FG - 59.05 in.
3VL9000-8AQ81
3VL2 / 3VL3 - 3 m
DG / FG - 118.1 in.
An extension of the cables beyond the specified dimensions is not permissible!
4.2.7
Connecting the optional motorized operating mechanism to COM20
If the circuit breaker is to be switched on or off via the bus, the electric motorized operating
mechanism with spring energy store is needed.
Note
The contact between WE and 24 V must be closed for the remote function! Without this wire
jumper, the SENTRON VL cannot be switched on or off via PROFIBUS DP.
More information on fitting the motorized operating mechanism can be found in the
installation instructions for the motorized operating mechanism.
Connection diagram of the COM20 to the motorized operating mechanism, SENTRON VL