Hardware and Connections
2-177SA522 Manual
C53000-G1176-C119-2
such as closing or tripping circuit breakers. Next to the keypad, a labeling strip is
provided on which the user-specified key functions may be written.
7. 9-pin female D-subminiature connector
This serial interface is for the connection of a local PC running DIGSI
®
4.
8. 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.
9. Light emitting diodes (LEDs)
The function of these indicators can be programmed. 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.
10. Operating condition indicators
The two LEDs “RUN” (green) and “ERROR” (red) indicate the operating condition
of the device.
11. Coverings for the screws that secure the front panel.
View of Front Panel
(Housing Size
1
/
1
)
The significance of the operating and display elements is the same as explained after
Figure 2-16.
Figure 2-17 Front view of a 7SA522, housing size
1
/
1
, for panel surface mounting, without optical connections
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36 L+ L- 39 40 41 4742 43 44 45 46 48 49 50
87 88 89 90 91 9792 93 94 95 96 98 99 10085
26 27 28 29 30 31 32 33 34 35
11 12 13 14 15 16 2217 18 19 20 21 23 24 25
1 2345678910
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SIEMENS
SIPROTEC
1 2
6
3
+/-0
54
7 8 9
7SA522
RUN ERROR
MENU
ESC
LED
ENTER
F4
F1
F2
F3
Meldungen
Meßwerte
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