Signals - ABB RELION 620 Series Technical Manual

Protection and control

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Basic functions

"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.

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.

Figure 28: Operating sequence "LatchedAck-F-S"

Signals

Table 28: Input signals

Table continues on the next page

1MRS757644 H

Ok input for LED 1

Alarm input for LED 1

Reset input for LED 1

Ok input for LED 2

Alarm input for LED 2

Reset input for LED 2

Ok input for LED 3

Alarm input for LED 3

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