Hardware and Connections
2-277SA6 Manual
C53000-G1176-C133-1
tories, for displaying the lists of the event logs (F1), the operational measured val-
ue (F2) and the trip logs of the last fault (F3). The key F4 is not allocated. All func-
tion keys are freely configurable. Next to the keypad, a labeling strip is provided
on which the user-specified key functions may be written.
7. CTRL key
The function of this key is to show the control display.
8. Key-operated switch
2 key-operated switches guarantee a fast, but save access to the functionalities
„changing between local and remote“ and „changing between interlocked and
non-interlocked operation”.
9. 9-pin female D-subminiature connector
This serial interface is for the connection of a local PC running DIGSI
®
4.
10. LED key
This key has the dual purpose of resetting latched LEDs and the latched contacts
of output relays, as well as testing all of the LEDs.
11. Light emitting diodes (LEDs)
The function of the 14 LEDs are freely configurable. There is a vast selection of
signals from which to choose. Some examples are device status, processing or
control information, and binary input or output status. Next to the LEDs on the front
panel, a labeling strip is provided on which the user-specified LED functions may
be written.
12. Operating condition indicators
The two LEDs “RUN” (green) and “ERROR” (red) indicate the operating condition
of the device.
13. Coverings for the screws that secure the front panel.
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