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does not need a very exact location, it is possible to use a virtual contact as brake indicator,<br />

too.<br />

Some of the configuration explained in section 5.8, “Arranging Indicators in a Block”<br />

can be created with Virtual Contacts, too, by replacing momentary sensors by Virtual<br />

Contacts:<br />

A B C<br />

Diagram 137: Block with occupancy sensor and Virtual Contacts<br />

Diagram 137 is a variant of Diagram 91. The momentary sensors A and C are replaced<br />

by Virtual Contacts. B is the reference contact of A and C for both directions. For each<br />

Virtual Contact A and C and each direction different distances to the reference contact<br />

B must be specified. The indicators A, B and C are assigned to the block and act as stop<br />

and brake indicators similar to Diagram 91.<br />

This method is less expensive than the method displayed in Diagram 91, because Virtual<br />

Contacts are free of charge. But this method requires that the speed profile of the<br />

affected locomotives is adjusted thoroughly and that the locomotives run very exactly<br />

according to their profile (see also section 3.5, “The Speed Profile”).<br />

A B C<br />

Diagram 138: Block with momentary sensors and Virtual Contact<br />

It is also possible to add a Virtual Contact to Diagram 92 in order to avoid undesired<br />

speed changes of passing trains caused by activation of routes ahead. This is shown in<br />

201

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