AUMA Electric multi-turn actuators SA 07.1 - 16.1_SAR 07.1 - 16.1 MATIC AM 01.1 - 02.1 - Manual (Page 40)

21.2.2 Setting actuator behavior on loss of signal
In case of a loss of signal of nominal value E1 or actual value E2, the reaction of
the actuator can be programmed via the switch S2-7. The complete range of
choices, however, is only available with signals 4 – 20 mA.
The following reactions are possible:
Fail as is:
Actuator stops immediately and remains in this position.
Fail close
Actuator moves the valve to the end position CLOSED.
Fail open:
Actuator moves the valve to the end position OPEN.
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Multi-turn actuators SA 07.1 – SA 30.1/ SAR 07.1 – SAR 30.1
with actuator controls AUMA MATIC AM 01.1 / AM 02.1
Operation instructions
Behavior on loss of signal of Prerequisite 1) Programming
E1 E2
Command signal
Setpoint E1
Feedback
Actual value E2 2)
via DIP switch S2-7
(see figure AF)
fail as is 4 – 20 mA 4 – 20 mA
fail close
4 – 20 mA 4 – 20 mA
0 – 20 mA
0 – 5 V
4 – 20 mA
fail open
4 – 20 mA 4 – 20 mA
4 – 20 mA
0 – 20 mA
0 – 5 V
fail as is fail open 4 – 20 mA 0 – 5 V
fail close fail open
4 – 20 mA
0 – 20 mA
0 – 5 V
0 – 20 mA 4 – 20 mA
0 – 20 mA
0 – 5 V
0 – 10 V
0 – 20 mA
0 – 5 V
fail close fail as is
0 – 20 mA 4 – 20 mA
0 – 10 V 4 – 20 mA
1) During loss of signal, signals from 0 – 20 mA and 0 – 5 V may be misinterpreted since E1 or E2 (without any fault) can also
be < 4 mA (end position CLOSED = 0 mA or 0 V) when working properly.
2) Signals for internal feedback:
0/4 – 20 mA from electronic position transmitter or 0 – 5 V from precision potentiometer 5 k
Ω
Table 7: Possible settings