Pilz PSSu H PLC1 FS DP SN SD - Manual (Page 12)

Function description
Operating Manual PSSu H PLC1 FS DP SN SD
1001776­EN­04 12
The periphery supply does not automatically switch off if values exceed or drop below
their limits. However, the "24 V" LED will light and a message will be entered in the dia­
gnostic list.
Please refer to the derating diagram.
Derating diagram for periphery supply: Temperature T dependent on load current I
T (°C)
20
40
60
80
100
0
1 2 3 4 5 6 7 8 9 10
I (A)
4.1.3 Integrated protection mechanisms
The module has the following protection mechanisms:
} Multi­channel diverse processor section
} Cyclical self tests
} Potentially isolated SafetyNET p interface
} Potentially isolated PROFIBUS DP interface
} Infeed for module supply
– Polarity protection
– Voltage monitoring
– Transient voltage limitation
– 20 ms voltage buffer if the supply voltage is interrupted
} Module supply
– Short circuit­proof
} Periphery supply
– Voltage monitoring (exceeding upper/lower limit)
4.1.4 SD card
The SD card has the following functions:
} The SD card is used to store the naming data and the device project; see PSS 4000
System Description.