MOL81 485 1312/MOL81 485 1337
MOL81 485 1312-MOL81 485 1337-UM-1.4-EN
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2 GENERAL INFORMATION
2.1 Device description
The MOL81 is a short-range transponder designed especially for railway applications. This all-in-one device
with internal antenna will typically be installed on board rolling stock, mounted externally under the vehicle
chassis, in order to do on-the-fly reading of OMR radiofrequency tags placed on the track between the rails.
The data read from the tags is sent to a host computer/controller via a RS485 serial link. This data is used for
real-time locating and depot storage.
The device uses two operating frequencies, a 125 kHz transmitter of a non-modulated carrier for remote
powering of tags and a 6.78 MHz narrow-band receiver for data reception. The unit is self-testing and this
function can be activated via the serial link.
A watertight IP67 connector has pins for DC power, a serial link and digital outputs.
Two digital outputs inform of:
•
125 kHz ok
•
Tag present
The device's self-test function checks for the correct operation of both the powering transmitter and the data
receiver.
Direction of travel:
The MOL81-485-1312 and the MOL81-485-1337 products are identical, except that the MOL81-485-1337 has
particular adjustments so that it must be mounted on metal.
Sr
Sr : recommended reading height (see product specification).
