Siemens siprotec 7SA522 User Manual page 469

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7SA522 Manual
C53000-G1176-C119-2
Caution!
Electrostatic discharges through the connections of the components, wiring, plugs,
and jumpers must be avoided. Wearing a grounded wrist strap is preferred. Otherwise,
first touch a grounded metal part.
At one end, disconnect the ribbon-cable between the front cover and the CPU board
(å). To disconnect the cable, push up the top latch of the plug connector and push
down the bottom latch of the plug connector. Carefully set aside the front cover.
Disconnect the ribbon-cables between the CPU board (å) and the I/O boards (ê).
Remove the boards and set them on the grounded mat to protect them from ESD dam-
age. A greater effort is required to withdraw the CPU board, especially in versions of
the device for surface-mounting, because of the communication connectors.
Check the jumpers according to Figures 8-9 to 8-12. Change or remove the jumpers
as necessary.
The order of the boards for housing size
1
for housing size refer to figure 8-8.
/
1
Slot 5 Slot 19
1 2
BI1 to
BI8
Figure 8-7 Front view of the device with housing size
plified and scaled down)
1
is shown in figure 8-7,
/
2
Processor printed circuit board CPU
1
Prozessorbaugruppe
Input/output printed circuit board I/O-1
2
with power supply
Input/output printed circuit board I/O-2
3
(transducers)
Slot 33
3
Binary inputs (BI)
Installation and Commissioning
1
/ after removal of the front cover (sim-
2
8-13