According to me it can be done with Playmobil signal 4397 and a TRIX switch.Can somebody e-mail me a complete manual from that signal?
I think, for LGB signals you need a isolated track and an electrical switch (not manual).Look HERE [KLICK!] is perhaps what you want (if you mean LGB signals, not Playmobil signals).
@ playmofire: I hoped Playmobil 4397 was powered by the transformer. That makes things a little complicated.