Safety in the event of a fire is further enhanced if, a warning is not only given in good time, but countermeasures are also automatically taken simultaneously. The Gira wireless module makes this possible. Due to the compatibility to the radio bus system, alarm messages can be used to control the radio actuators. This can be used for example to switch on the light or raise blinds in the event of an alarm. Controlling eNet components can only be realised on eNet in connection with the radio transformer.