Karel MS48 Installation & Maintenance Guide
Edition 3.2
36
Figure B-2
It is recommended to close the front cover after the cabling of extensions / lines and
accessories is completed, by inserting the two screws into the holes on the right
side of the front cover (see Figure B-2).
IMPORTANT
The equipment can be installed only by the service personnel.
The area behind the front cover is not for operator access, hence the
front cover can be opened only by the service personnel.
The mains socket should be installed near the equipment or should be
easily accessible.
II.1. GROUNDING
There are two different ground terms in MS48 system.
a) One is the signal ground, which takes place on the MB48 motherboard as well
as the add-on cards. It serves as a reference for the signals on the cards.
b) Second is the chassis ground.
The subject of this section is chassis ground, which has an utmost importance for
the protection of the system against any lightning, or any high voltage coming
through external lines, extensions or mains.
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