Duty Cycle; Automatic Disconnection In Case Of Overload - HomeMatic HmIP-BSM-I Installation And Operating Manual

7.2

Duty cycle

The duty cycle is a legally regulated limit of the transmission time of de-
vices in the 868 MHz range. The aim of this regulation is to safeguard the
operation of all devices working in the 868 MHz range.
In the 868 MHz frequency range we use, the maximum transmission time
of any device is 1% of an hour (i.e. 36 seconds in an hour). Devices must
cease transmission when they reach the 1% limit until this time restriction
comes to an end. Homematic IP devices are designed and produced with
100% conformity to this regulation. During normal operation, the duty
cycle is not usually reached. However, repeated and radio-intensive pair-
ing processes mean that it may be reached in isolated instances during
start-up or initial installation of a system. If the duty cycle is exceeded,
this is indicated by one long red lighting of the device LED (A), and may
manifest itself in the device temporarily not working. The device starts
working correctly again after a short period (max. 1 hour).
7.3

Automatic disconnection in case of overload

If the device is overloaded with load currents greater than 6 A or
with loads with more than 1380 W power, after a short delay time,
this leads to the Switch Module's automatic disconnection. The
safety disconnection is reported with an error message via the app
or WebUI.
To be able to use the device again, you must remove the overload and
disconnect the device from the mains and then reconnect it. Alternatively,
you can wait 30 minutes after removing the overload ("restart lock"). The
Switch Module can then be switched on again. The Switch Module is not
automatically switched on after the restart lock has expired.
Troubleshooting
37