ABB Relion 620 Series - Signals

"Latched-S": Latched, ON
This mode is a latched function. At the activation of the input signal, the alarm
shows a steady light. After acknowledgement by the local operator pressing any key
on the keypad, the alarm disappears.
Activating
signal
LED
Acknow.
Figure 27: Operating sequence "Latched-S"
"LatchedAck-F-S": Latched, Flashing-ON
This mode is a latched function. At the activation of the input signal, the alarm
starts flashing. After acknowledgement, the alarm disappears if the signal is not
present and gives a steady light if the signal is present.
Activating
signal
LED
Acknow.
Figure 28: Operating sequence "LatchedAck-F-S"
3.4.3 Signals
Table 28: Input signals
Name Type Default Description
OK BOOLEAN 0=False Ok input for LED 1
ALARM BOOLEAN 0=False Alarm input for LED 1
RESET BOOLEAN 0=False Reset input for LED 1
OK BOOLEAN 0=False Ok input for LED 2
ALARM BOOLEAN 0=False Alarm input for LED 2
RESET BOOLEAN 0=False Reset input for LED 2
OK BOOLEAN 0=False Ok input for LED 3
ALARM BOOLEAN 0=False Alarm input for LED 3
Table continues on the next page
Basic functions 1MRS757644 H
86 620 series
Technical Manual