Operation
Operating Manual PSS u2 ES 4DO SR 0.5A
1004553-EN-01
21
[1]
Col-
our
[1]
[2]
Col-
our
[2]
Meaning
Further information
Red
Green The module status display and the terminal
status display on the relevant output flash
synchronously
Short circuit/overload/undervoltage
See module's diagnostic log.
Red
Green Temperature error: too warm (1)/warning,
e.g. undervoltage
See module's diagnostic log
Red
Green The module status display and all terminal
status displays flash synchronously
Periphery supply is missing/temperature
error: Too hot (1)
See module's diagnostic log
(
1
) There are two levels of overtemperature.
}
Too warm:
If the module temperature exceeds a threshold value, then:
– a warning is sent to the head module.
If the temperature drops back below the threshold value, the module sends an all-clear.
}
Too hot:
If the module temperature exceeds another threshold value, then:
– an error message is sent to the head module
– the outputs are switched off
– The valid bits for the outputs are set to "0"
After the "too hot" message has been received, if the temperature drops back below the
"too warm" threshold value, the module will switch to an error-free state.
Legend
LED on
LED flashes
LED flashes briefly
LED off
