| 摘要 |
<p>The signal box has several interchangeable elements each having a bistable electromagnet with two drive coils for setting a first or second operating state. The individual switch member (b1, b2) of one element (WE1, WE2) has an engaging switch b1r, b which can be released by the individual switch member, and a non-engaging switch (b10, b20) in which the two switches can be operated in synchronism. The normal position of the elements (WE1, WE2) can only be switched on by the standard track switch member (PT) when a safety circuit is closed by disengaging the switches (b1r, b2r) of the elements (WE1, WE2) which are switched in individually. When the individual switch member (b1, b2) of one element (WE1, WE2) is actuated the indicator element (LED1, LED2) of the element which marks the relevant operating state is switched on.</p> |
