 |
||||||||||||||||||
 |
||||||||||||||||||
|
Custom
modified mechanical switches for safe detection in a harsh environment.
Railway applications are a difficult environment for sensitive electronic sensors. If you want to detect an open/closing of doors or the proper engagement and locking of the mechanical coupler between units of a train set you are forced to find a solution which has to work under extreme temperature conditions, dust and humidity influences as well as vibrations or shock impact. In
other areas of a railway system you may even need good resistance
to electromagnetic disturbances or other nasty influences. Electronic
sensing solutions with their limited temperature range and sensitivity
to electromagnetic fields are not reliable enough. This is an environment
where a sealed mechanical switch is a definitely a better solution
for a position detection system. To respond to the large variety of the applications and their actuating forces and directions, the mechanical actuator can be modified in a lot of different ways to the specific need, like for this door locking application (Fig 1), where the lever had to be extended and bent in order to fit into the already built door frame. The coupler between train units is typically an element exposed to shock, dust and humidity. The mounted MP210 sealed switch (Fig. 2) detects the proper locking of the coupler. The wide temperature range of the switch of – 40°C / +130°C allows its use in all regions of the world and the IP67 protection keeps all dust or water off the switching circuit. Other
applications where IP67 and temperature resistance are required can
be found for brake detection, pneumatic door lock detection or sensing
of the take up position. Tel:
0844 8009324 |
|||||||||||||||||
