Siemens SENTRON VL Series System Manual page 43

The figure below shows that the metering function PLUS is mounted on the rear of the trip
unit (ETU).
①
②
③
Figure 3-8
Data exchange with trip unit
The trip unit and the metering function PLUS exchange all current data via a high-speed
synchronous interface. The metering function PLUS provides all connected modules (e.g.
COM15) with the following data for further processing via the CubicleBUS:
● The parameters for the extended protection function
● The parameters for the threshold values
● The measured value settings
● The determined measured values
Connection
The internal switch wiring is continued via the CubicleBUS connection. Depending on the
equipment of the switch, the cable leads to the BSS or direct to the X8 terminals.
3WL/3VL circuit breakers with communication capability - PROFIBUS
System Manual, 03/2011, A5E01051353-02
Rear of the ETU
Metering function PLUS
Connection for the breaker identification module
Metering function PLUS
3WL air circuit breakers
3.3 Metering functions
43