ABB i-bus EIB 6987/10 Manual De Instrucciones página 28

Repeater function
On the Powernet side the system coupler has full
repeater functionality in every operating mode, i.e.
Powernet telegrams are automatically repeated, if
necessary, and transmitted on all phases of the
230 V / 400 V network (active phase coupling). The
telegram repetition is indicated on the device by brief
flashing of the Powernet transmission / reception LED
(see device design, item 3). When a telegram is re-
ceived, the LED (3) lights up green. When the system
coupler transmits a telegram, the LED lights up red.