AXL SE PSDI8/3
60 / 84
PHOENIX CONTACT
108928_en_02
Input to clock output
Yes
Symme
-
try viola
-
tion
2
No
– In state “0”:
The safe input detects symmetry violation, as state “1”
is present on one channel only.
– In state “1”:
The error must be detected by the sensor.
The sensor must ensure that the safe state is entered
in the event of an error.
– Change in state from “1” to “0”:
The faulty input remains at “1”. A “0” is transmitted in
the process data image of the affected inputs.
– Change in state from “0” to “1”:
A “0” is transmitted in the process data image of the
inputs, if the faulty input was not previously set to “0”.
Input to 24 V
Yes
Symme
-
try viola
-
tion
2
No
Short circuit
Input to ground
Yes
Symme
-
try viola
-
tion
2
No
The error is detected in state “1” or on a change in state
from “0” to “1”, as the state only changes in one channel.
1
SF = safety function
2
Only applies when symmetry monitoring is active.
Table 7
-
6
2-channel equivalent: external supply (OSSD) [...]
Error type
Detec
-
tion
Diagnos
-
tics
Loss of
SF
1
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