Ii.3. Mb48 Motherboard & Exp48 Expansion Modules - Karel MS48 Installation & Maintenance Manual

These connections are illustrated in the following figure.
The free space inside the system cabinet, below the SPS48 card, is reserved for
the battery, which can be attached to the system cabinet via the metal bars that can
be supplied on demand.
The ventilation holes on the front cover of the system cabinet must not be closed
for any reason, since it may cause SPS48 to overheat and get damaged.
II.3. MB48 MOTHERBOARD &
EXP48 EXPANSION MODULES
The MB48 motherboard comes installed in the cabinet. It stays on the brass card
holders that are attached to itself by screws. One of the brass card holders together
with its screw – the one passing through the M4 hole at the right side of the
motherboard – is used to carry the chassis ground to the motherboard and add-on
cards.
The MS48 system can have at most two EXP48 Expansion Modules, that are add-
on cards to be installed on the MB48 motherboard. In such a case, the first EXP48
card is located on the motherboard and the second one is placed on the first one. In
such a situation, the EXP48 (2/6) card cannot be the first card located on the
motherboard. Rather, it must be placed on the other EXP48 card, due to its smaller
dimensions.
Such an installation can be established simply as follows: There exist several male
connectors on the solder side of each EXP48 card. The female correspondents of
these connectors are also available on each EXP48 card together with the MB48
motherboard. The following figure illustrates the location of these connectors on the
EXP48 cards as well as the MB48 motherboard.
38
Figure B-4
IMPORTANT
Karel MS48 Installation & Maintenance Guide
Edition 3.2