Condair Amazon Echo, Instructions Manual, Page: 15 / 36

15 KNX & Amazon Echo (Alexa) interface
All SPA control boards that are to be controlled must be connected to the KNX Gateway via the Modbus
interface according to the wiring diagram above.
– Connect the cable shield on one side with the functional earth
– Connect all GND together
– Install bus line separate from supply voltage
– Topology: Daisy chain
– All devices of the same network need the same settings concerning baud rate and parity
– Every Modbus device address can only be allocated once within the same network.
Note: If a second SPA control board is connected to the gateway, it must be connected via a 3-core cable
(3 x 0.25mm
2
). The 24 V from the second SPA control board must not be connected to the gateway .