Matrix EB002, Руководство пользователя, Страница: 9 / 44

9
Using covers
In some circumstances it is advisable to
only allow access to certain parts of the
E-blocks boards. This includes situations
where settings or chip selections made on
E-blocks do not want changing, where there
is a chance of vandalism, or where there
is a chance of theft of components on the
E-blocks themselves.
To facilitate this clear acrylic covers are
available for all E-blocks. Covers are
mounted onto E-blocks with 25mm M3 bolts
and 10mm or 12mm spacers using the same
grid of holes that are used for mounting the
E-blocks to the backplane. The cross section
diagram in Figure 7 shows how this is done.
The tight fitting clear acrylic covers add
considerable strength to each E-block as well
as making them - to some extent - tamper
proof. The exception to this is the switch
board which, because the switches are
relatively short, requires the spacers to be
replaced with M3 lock nuts before the cover
is put into place.
Further security
If you are concerned about the security of
your E-blocks systems themselves then it is
possible to attach them to a bench using a
Kingston style lock.
Making your own equipment
In addition to the backplanes it is also
possible to buy rugged plastic storage trays
for E-blocks. These are slightly larger than
a metal backplane which means they are
ideal for storage and distribution of E-blocks
based systems. Lids, packing and freight
boxes are also available.
Making your own E-blocks
The prototype and patch boards that are
part of the E-blocks range, allow you to make
E-blocks with your own circuits on.
Figure 7 - cover side profile
25mm M3 bolts
PCB
Backplane
Clear acrylic cover