General System Information; Start-Up; Selecting The Power Supply Unit - HomeMatic HmIP-SRD Bedienungsanleitung

General system information

4 General system information
This device is part of the Homematic IP smart home
system and works with the Homematic IP radio protocol.
All devices of the system can be configured comfortably
and individually with the Homematic IP smartphone
app. Alternatively, you can operate the Homematic IP
devices via the Central Control Unit CCU2/CCU3 or in
connection with various partner solutions. The available
functions provided by the system in combination with
other components are described in the Homematic IP
User Guide. All current technical documents and updates
are provided at www.homematic-ip.com.
5

Start-up

5.1

Selecting the power supply unit

The rain sensor is operated via a separate power supply
unit (not included in the scope of supply).
The basic requirements to the power supply unit are:
• Safety extra-low voltage (SELV)
• Voltage: 10-19 V
12 V
• Cable length 30 m max. (at least 0.2 mm2)
38
/50 Hz (400 mA min.)
AC
(320 mA min.) or
DC