AUMA SQ 14.2 - Page 47

The following reactions are possible:
Fail as is:
Actuator stops immediately and remains in this position.
Fail close:
Actuator moves the valve to end position CLOSED.
Fail open:
Actuator moves the valve to end position OPEN.
Figure 35: DIP switch [S2-7] on positioner board
DIP1 = ON, actual value E2 is monitored
DIP2 = ON, setpoint E1 is monitored
Table 13: Recommended settings
[S2–7]Signal typeBehaviour on loss of signal of
DIP 1 2 3 4Actual value E2Setpoint E1E1 and/or E2
4 – 20 mA4 – 20 mAFail as is
Fail close
Fail open
Table 14: Further possible settings
[S2–7]Signal type
1)
Behaviour on loss of signal of
DIP 1 2 3 4Actual value E2Setpoint E1E2E1
0 – 5 V4 – 20 mAFail openFail as is
0 – 5 V4 – 20 mAFail openFail close
4 – 20 mA0 – 20 mA
0 – 20 mA
0 – 5 V
0 – 20 mA
0 – 5 V
0 – 10 V
4 – 20 mA0 – 20 mA
0 – 5 V
Fail close
4 – 20 mA0 – 20 mA
0 – 10 V
Fail as is
0 – 20 mA
0 – 5 V
4 – 20 mAFail open
in case of a signal loss, a misinterpretation might be made for 0 – 20 mA, 0 – 5 V or 0 – 10 V, due
to the fact that E1 or E2 could take the value 0 mA even without loss of signal (end position CLOSED
= 0 mA or 0 V).
1)
47
SQ 05.2 – SQ 14.2/SQR 05.2 – SQR 14.2
AM 01.1 Commissioning – controls settings