User Manual

Description
2.4 Electronic trip unit ETU600
3WA Air Circuit Breakers
Equipment Manual, 05/2021, 92310000002-03
89
2.4.4.2 Digital input and output
The ETU600 electronic trip unit has one digital input and one digital output. Both can be
configured on the ETU600 display in the device configuration menu or using the SENTRON
powerconfig configuration software.
The 24 V input can be used for the following:
• Activating the DAS+ maintenance mode
• Switchover to the second protection parameter set (parameter set B).
The meaning of the input signal (low or high) is configurable.
The floating output is a normally open contact. It is available for the ETU600 with internal
and external power supply and can be used for the following displays:
• Signaling of the error-free operating state of the ETU600
When this signal is integrated into a control system, the status of the functionality of the
electronic trip unit is transmitted at all times. If an internal fault is detected by the
electronic trip unit or if the ETU600 is no longer able to control this output, the contact is
opened and the message “Fault-free operating state of the ETU600” disappears. The
function of the digital ETU output can be described as “life contact”.
• DAS+ maintenance mode
• Second protection parameter set (parameter set B) active
Technical specifications and connection
The connection is made at the secondary disconnect terminal system of the 3WA circuit
breaker.
Digital input ETU-IN
Connection
X8-5 and X8-6
Number of inputs
1
SELV/PELV suitable
✓
Rated voltage
24 V DC ±20%
Voltage value for reliable detection of a “1 signal”:
15 V DC
Current consumption at signal voltage of >15 V DC
<10 mA
Minimum signal duration
100 ms
Floating output ETU-OUT
Connection
X8-7 and X8-8
Number of outputs
1
Contact
Normally open contact
Rated voltage
24 V DC ±20%
Maximum switching current
0.1 A at 24 V DC
Maximum continuous current 0.1 A at 24 V DC