Figure 4: LHMI keypad with object control, navigation and command push buttons
and RJ-45 communication port
2.2.3.1
Programmable push buttons with LEDs
Figure 5: Programmable push buttons with LEDs
The LHMI keypad on the left side of the protection relay contains 16 programmable
push buttons with red LEDs.
The buttons and LEDs are freely programmable, and they can be configured
both for operation and acknowledgement purposes. That way, it is possible to
get acknowledgements of the executed actions associated with the buttons.
This combination can be useful, for example, for quickly selecting or changing a
setting group, selecting or operating equipment, indicating field contact status or
indicating or acknowledging individual alarms.
1MRS757644 H
620 series overview
620 series
Technical Manual
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