•
Unfasten the screw-posts of the D-subminiature connectors on the back panel at location “A” and “C”. This
activity is not necessary if the device is designed for surface mounting.
•
If there is an additional interface on location "B" next to the interfaces at location "A" and "C", remove the
screws located diagonally to the interfaces. This activity is not necessary if the device is designed for
surface mounting.
•
Remove the covers on the front panel and loosen the screws which can then be accessed.
•
Remove the front panel and tilt it to the side.
Work on the Plug Connectors
CAUTION
Mind electrostatic discharges:
Non-observance can result in minor personal injury or property damage.
²
In order to avoid electrostatic discharges when handling plug connectors, first touch an earthed metal
surface.
²
Do not plug or unplug interface connectors under voltage!
For the assembly of the boards for the housing size
1
/
3
refer to Figure 3-3, and for the housing size
1
/
2
in
Figure 3-4.
•
Disconnect the plug connector of the ribbon cable between the front cover and the processor board C-
CPU-2 at the front cover itself. This is done by pushing apart the plug connector's top and bottom latches
so that the ribbon cable connector is pressed out.
•
Disconnect the ribbon cables between the processor board C-CPU-2 (No. 1) and the input/output boards
I/O (according to order variant No. 2 to No. 4).
•
Remove the boards and put them on the earth mat to protect them from ESD damage. In the case of the
device variant for panel surface mounting, please be aware of the fact that a certain amount of force is
required in order to remove the C-CPU-2 module due to the existing plug connectors.
•
Check the jumpers according to Figures C-CPU-2 processor board, Page 186 to Figure 3-13 and the
following information. Change or remove the jumpers if necessary.
Mounting and Commissioning
3.1 Mounting and Connections
184 SIPROTEC 4, 7VK61, Manual
C53000-G1176-C159-5, Edition 05.2018
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