Function description
Operating Manual PSSu E F BSW(-T)
21372-EN-06
13
4.2.2
Functions
Module supply
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The module supply provides the module with voltage.
Voltage infeed
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Refreshing the periphery supply: The relevant base module interrupts the connection to
the incoming (left-hand) periphery supply and C-rail on the module bus.
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Supply to the module bus:
–
Periphery supply for subsequent modules (right-hand side)
–
C-rail supply for subsequent modules (right-hand side)
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The module does not automatically switch off the periphery supply in the case of under
or overvoltage. However, there will be a visual signal (“24 V” LED) and a message will
be sent to the head module (entry in the error stack).
Block switching
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The module is used to switch off the periphery supply safely on standard modules that
are arranged in blocks.
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Each output block requires its own block switching module.
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The periphery supply can be switched off via the controller's failsafe user program.
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The periphery supply is switched off if a module error is detected.
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A new supply voltage module or a terminating plate signifies the end of an output block.
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The relationship between the load current and the operating temperature is illustrated in
the following derating diagram. The operating point should be below the characteristic
curve.
Derating diagram (PSSu E F BSW): Permitted ambient temperature T dependent on load
current I
20
40
60
80
100
0
1
2
3
4
5
6
7
8
9
10
25
T [°C]
I [A]
