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Each output with “1” state is continuously observed whether this can still be switched off.
Here wiring errors e.g. short circuit to DC 24V and errors within the System SLIO safety
module can be detected. The
test pulse length
must be set depending on cable capaci-
tance and the load current.
If the test pulse length is too long, a connected actuator may briefly
switch off during the test pulse, or if there is another security device con-
nected, this can recognize a 0-signal and turn off incorrectly!
If the test pulse length is too short, the System SLIO safety module
reports an error, because here it is not possible for the module to test the
switch-off ability of an output. Then the module reports "short circuit".
Orientation values for the test pulse length
Load current
Cable length (capacity, resistor)
Test pulse
length to be
configured
2 mA
100 m (30 nF, up to 6.7 Ohm)
3000 µs
2 mA
333 m (100 nF, up to 22.4 Ohm)
4500 µs
2 mA
1000 m (300 nF, up to 67 Ohm)
8000 µs
5 mA
100 m (30 nF, up to 6.7 Ohm)
2000 µs
5 mA
333 m (100 nF, up to 22.4 Ohm)
2500 µs
5 mA
1000 m (300 nF, up to 67 Ohm)
4500 µs
> 25 mA
100 m (30 nF, up to 6.7 Ohm)
1000 µs
> 25 mA
333 m (100 nF, up to 22.4 Ohm)
1500 µs
> 25 mA
1000 m (300 nF, up to 67 Ohm)
1500 µs
Test pulse length
VIPA System SLIO
Product description
SDO 4xDC 24V 0.5A - FSoE Parameter record set > FSoE application parameters
HB300 | SM-S | 02x-1SD10 | en | 20-02
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