3VL molded-case circuit breaker
4.2 COM20 connection
3WL/3VL circuit breakers with communication capability - PROFIBUS
System Manual, 03/2011, A5E01051353-02
103
PROFIBUS LED
The PROFIBUS LED shows the status of the PROFIBUS DP communication of the COM20.
Table 4- 6 PROFIBUS LED
PROFIBUS LED Meaning
Off No connection active
Static green (steady light) COM20 is supplied externally with 24 V DC; PROFIBUS class 1
master connection active
Flashing green COM20 is supplied externally with 24 V DC; PROFIBUS class 2
master connection active; no PROFIBUS class 1 master
connection active
LED TRIP UNIT (ETU)
The TRIP UNIT LED provides information on the status of the trip unit
Table 4- 7 LED TRIP UNIT (ETU)
ETU LED Meaning
Off No voltage on COM20; no communication or communication
fault between the 3VL ETU and the COM20
Static green (steady light) COM20 is supplied externally with 24 V DC; communication
with 3VL ETU in order
Flashing green The ZSI signal is active on the connected ETU (used as
indicator for the ZSI test)
4.2.9 Measuring accuracy
The following values apply for the current values of the ETU and the LCD ETU that are
transferred via communication or indicated in the display of the LCD ETU.
Current Accuracy
0.0 - 0.2 x I
n
Activation limit of the ETU
No transfer of current values.
0.2 - 0.3 x I
n
± 25 %
0.3 - 1.0 x I
n
± 10 %
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