Or from the IR code convertor. The IR code convertor has a 6 pin DIN plug connection for the sensor eye.
(IR code convertor is for controlling older products with the Beolink1000/Beo4.)
I changed the 6 pin DIN plug to a 3,5mm jack plug and use it as an external receiver for the Lintronic TT455-RT-238 device.
It's also possible to use it instead of the new round IR-eye (Masterlink) if you change the plug.