Track Balises
Track balises (magnets) PM500 and PM1020 are parts of INDUSI based automatic train protection systems used in order to increase the safety level in railway traffic.
Balises are the track (infrastructure) part of ATP system and they perform resonant influence on the locomotive part of the system when the train passes over it.
Functionality
Track balises are active on 500 Hz (PM500) frequency and on 1000/2000 Hz frequency (PM1020). 500 Hz influence controls speed at the detection approaching to the red light. 1000 Hz influence activates awareness and time control of the engine driver. It also triggers speed control once the time control begins. 2000 Hz influence immediately activates emergency braking.
Safety
Track balises PM500 and PM1020 are tested according to CENELEC norms EN 50121-4 (EMC) and EN 50125-3 (electromagnetic immunity). Track balises are IP67 protected against water and dust. Complete interior of the balise is protected by special resin which enables its operation even after heavy mechanical damage.
Maintenance
No need for frequency adjustment or any form of maintenance. Adjustable mounting bracket enables quick position changes and track balise can be mounted on multiple rail types. ALTPRO can provide a testing device (PMI3) which measures all track balise parameters.