Mounting and Commissioning
3.1 Mounting and Connections
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
368
Work on the Plug Connectors
Caution!
Mind electrostatic discharges
Non–observance can result in minor personal injury or material damage.
Electrostatic discharges through the connections of the components, printed conductors and connector pins
must be avoided by touching earthed metal parts beforehand.
Do not plug or withdraw interface connections under power!
The following must be observed:
• Disconnect the ribbon cable between the front cover and the C-CPU-2 board (No. 1 in Figures 3-1 and 3-2)
at the front cover side. To do this, spread the latches on the upper and lower end of the plug connector to
release the plug connector of the ribbon cable.
• Disconnect the ribbon cables between the C-CPU-2 board (1) and the I/O boards (2) to (4), depending on
the variant ordered.
• 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 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 in accordance with Figures 3-3 to 3-8and change or remove them as required.
The allocation of the boards for housing size
1
/
2
is shown in Figure 3-1 and for housing size
1
/
1
in Figure 3-2.
Figure 3-1 Front view of a 7UM621/623 (housing size 1/2) after removal of the front cover
(simplified and scaled down)
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