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118<br />

Normal Speed<br />

Threshold Speed<br />

Stop<br />

B1 B2 B3<br />

Braking<br />

Ramp<br />

Diagram 88: How Brake and Stop Indicators work – Occupancy Sensors<br />

Diagram 88 shows a block, which is equipped with three occupancy sensors. The left<br />

entries to the sensed track sections are marked with B1, B2 and B3.<br />

Normal Speed<br />

Threshold Speed<br />

Stop<br />

B2 B3<br />

Braking<br />

Ramp<br />

Diagram 89: How Brake and Stop Indicators work – Momentary Track Contacts<br />

An alternative, but for this discussion almost equivalent situation shows Diagram 89. It<br />

contains a block, that is equipped with two momentary contacts. These contacts are<br />

marked with B2 and B3, too.

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