Siemens SIPROTEC 7SJ62 Manual page 400

Mounting and Commissioning
3.1 Mounting and Connections
Here, the following must be observed:
• Disconnect the ribbon cable between the front cover and the CPU board (No. 1 in Figures 3-3 and 3-6) at
the front cover side. Press the top latch of the plug connector up and the bottom latch down so that the plug
connector of the ribbon cable is pressed out. This action does not apply to the device version with detached
operator panel. However, on the central processor unit CPU (No. 1) the 7-pole plug connector X16 behind
the D-subminiture connector and the plug connector of the ribbon cable (connected to the 68-pole plug con-
nector on the rear side) must be removed.
• Disconnect the ribbon cables between the CPU unit (No. 1) and the input/output printed circuit boards I/O
(No. 2), (No. 3) and (No. 4).
• Remove the boards and set them on the grounded mat to protect them from ESD damage. In the case of
the device variant for panel surface mounting please be aware of the fact a certain amount of force is re-
quired in order to remove the CPU board due to the existing plug connector.
• Check the jumpers according to figures 3-8 to 3-17 and the following information. Change or remove the
jumpers if necessary.
The arrangement of modules for device types and housing sizes are shown in Figures 3-3 to 3-7.
Module Arrangement 7SJ62
The arrangement of modules for device 7SJ62 is illustrated in the following figure.
Figure 3-3 Front view of 7SJ62 after removal of the front cover (simplified and scaled down)
400
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008