GVS KNX Line Coupler, 2SU MDRC
"Dimensions : 36×90 ×64mm
Weight : 0.1KG
Housing : Plastic housing, beige
Temperature : Operation –5 °C ... + 45 °C
Power supply : Bus Main line 21-30V DC,
used for power supply of the device
Connections : KNX Main/Sub line
Left bus connection terminal(Red/Black)"