Siemens SIPROTEC 6MD665, Manual

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3.1 Installation and Connections
99
6MD665 Manual
C53000-G1876-C103-3
Work on the plug
connectors
Caution!
Mind electrostatic discharges
Non–observance can result in minor personal injury or property damage.
When handling with plug connectors, electrostatic discharges may emerge by previ-
ously touching an earthed metal surface must be avoided.
Do not plug or withdraw interface connections under power!
When performing work on plug connectors, proceed as follows:
• Release the connector of the ribbon cable between CPU processor module (1) and
front cover at the front cover itself. 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.
These activities are not necessary if the device has a detached operator panel.
However, on the CPU processor module (1) the 7-pin plug connector X16 behind
the subminiture socket and the plug connector of the ribbon cable (connected to the
68-pin plug connector on the rear side) must be removed.
• Disconnect the plug connectors of the ribbon cable between the CPU processor
module (1) and the input/output modules I/O-1 (2) and I/O-5 (3).
• Remove the modules and place them on a surface suitable for electrostatically sen-
sitive modules (ESD).
• Check jumpers and change/remove if necessary.
Module arrange-
ment 6MD665
without measured
values
Figure 3-1 Front view with no measured values after removal of the front cover (simplified
and with minimised zoom)