Function description
Operating Manual PSS u2 ES 16DI
1004551-EN-01
9
4
Function description
4.1
Block diagram
I0
1
I14
15
Module
Supply
Data
(ST)
Periphery
Supply
+24 V DC
Mo
d
u
le
B
u
s
I1
2
I15
16
Input Input
Input
Input
Fig.: Block diagram PSS u2 ES 16DI
4.2
Supply
}
The module supply provides the module with voltage.
The energy-saving levels are controlled by the head module and are not configurable. The
module supports the following energy-saving levels:
}
Switching off the LEDs
The LEDs have two energy-saving levels:
– Switching off the LEDs to display the terminal status
– Switching off the LEDs to display the module and terminal status
}
Standby mode
– All module functions are inactive.
– The LEDs for displaying the module and terminal status are switched off.
4.3
Inputs
}
The status of the inputs is signalled to the head module via the module bus.
}
The inputs are fitted with a configurable software filter.
}
Pulse stretching can be configured for the inputs.
Signal detection
}
Any signals that are shorter than the signal suppression time t
pulse_sup
are filtered out.
The signal suppression time depends on the configured software filter time.
t
pulse_sup
= t
filter
– 300 µs
