SDAT-MHS
Festo – SDAT-MHS – 2017-11f English 7
2.1 Analogue output function
The analogue output provides a path-proportional output signal 4…20 mA in the sensing range of the
piston stroke.
– The analogue output signal can be scaled.
– The direction of increase of the analogue output signal can be inverted.
– In the switching output operating mode, the analogue position signal is made available parallel and
independent of the position value output of the switching output.
– The analogue output is switched off in the operating mode IO-Link.
0 mm x mm
2 mA
4 mA
20 mA
AB C
x = Maximum length of the sensing range (type-dependent)
Fig. 2 Characteristic curve, analogue output
Signal
Description Area
1)
0 mA – IO-Link operation
– error (e.g. broken cable, parameter error)
2 mA – piston outside of the sensing range after the operating voltage is
switched on
A, C
4 mA – the piston has left the sensing range in the direction of the falling
output current
A
>4 mA ... <20 mA – piston within the sensing range B
20 mA – the piston has left the sensing range in the direction of the rising
output current
C
1) Area è Fig. 2, Area A and C: Red LED illuminated
Tab. 2 Output signal, analogue output
Note
With active IO link communications, the analog output is switched off
(output current = 0 mA).
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