2
0
1
9
-0
2
20
Output Function in Normal Operation
The analog output shows the minimum value of the relevant value range (4 mA or 0 V) at the
start position (I/U1). If the actuator rotates toward the programmed end position (I/U2), the
output value increases proportionally in relation to the rotation angle covered. When the
programmed end position (I/U2) is reached, the analog output shows its maximum value (20
mA or 10 V). If the actuator moves within the area of the programmed measuring range, the
corresponding yellow LED lights up. If the actuator rotates beyond the limits of the programmed
measuring range, the LED goes out. The output logic depends on whether the analog output
assumes the function of a voltage or a current output.
Current output:
If the measuring range is exceeded, the analog output value adopts the fault signal 3.6 mA. The
current output delivers this fault current until the position of the actuator falls back within the
programmed analog measuring range.
Voltage output:
If the measuring range is exceeded, the analog output value retains the last displayed value
until the position of the actuator falls back within the analog measuring range (depending on
the direction of rotation, i.e., 0 V or 10 V).
When the position falls back within the programmed measuring range, the output value is
updated according to the position of the actuator and adopts the programmed function.
Function when actuator is lost
If the actuator leaves the sensing range of the angular positioning system (e.g., actuator is
removed), the output logic depends on whether the analog output assumes the function of a
voltage or a current output.
Current output:
The output current retains the last valid value for 0.5 seconds. The output current then switches
to a value of 3.6 mA in order to signal a fault. This current value is output until the actuator falls
back within the sensing range of the angular positioning system and the output value is
updated.
Voltage output:
The output voltage retains the last valid value. This value is output until the actuator falls back
within the sensing range of the angular positioning system and the output value is updated.
Note!
Special feature when the system is switched on with a voltage output
If a high resistance load is connected to the sensor and the sensor is therefore operating with a
voltage output, a special function occurs when the system is switched on in the following
situations:
If the actuator is located outside the parameterized range when the system is switched on, the
sensor does not know whether the actuator has previously left the parameterized range at the
top or bottom end. The sensor does not know whether it should output the value 0 V or 10 V,
and therefore emits a fault voltage of approximately 1.7 V. This voltage remains stable until the
actuator reenters the parameterized angle range. From this point in time, the voltage output
functions correctly again.
The same functionality occurs if the sensor does not detect an actuator when the system is
switched on.