Digital Input And Output - Siemens SENTRON 3WA1 Manual

Description
2.4 ETU300 electronic trip unit
2.4.3.2

Digital input and output

The electronic trip unit ETU300 has one digital input and one digital output.
The input responds to a 24 V signal with signal level HIGH and activates the
maintenance mode DAS+.
The floating output is a normally open contact (NO). It is activated when the
maintenance mode DAS+ is active.
Technical specifications and connection
The connection is made at the secondary disconnect terminal system of the 3WA air
circuit breaker.
Digital input ETU-IN
Connection
Number of inputs
SELV/PELV suitable
Rated voltage
Voltage value for reliable detection of a "1
signal":
Current consumption at signal voltage of >15 V
DC
Minimum signal duration
Floating output ETU-OUT
Connection
Number of outputs
Contact
Rated voltage
Maximum switching current
Maximum continuous current
• The digital input is designed for a control supply voltage of 24 V DC.
No polarity is specified at the DI ETU.0 and DI ETU.1 input terminals.
• The digital outputs DO ETU.0 and DO ETU.1 are designed for 24 V DC and as a
normally open contact (NO).
If the power to be switched exceeds the breaking capacity of the output, a suitable
coupling relay must be used.
82
X8-5 and X8-6
1
✓
24 V DC ± 20%
≥15 V DC
< 10 mA
100 ms
X8-7 and X8-8
1
Normally open contact
(NO)
24 V DC ±20%
0.1 A at 24 V DC
0.1 A at 24 V DC
Equipment Manual, 02/2023, 92310000002-06
3WA1 air circuit breaker