4. Device installation | 4.3 - Hardware construction | 38
Example:
Relay control (power output)
①
Supply unit U
DC
= 24 V 0.5 A
②
Inductive load for free-wheel diode
The relay switches when the output DO1 is active (true).
To protect the output circuit, relays must be equipped with free-wheel
diodes.
Example:
Voltage output
①
Supply unit U
DC
= 24 V 0.5 A
When the output DO1 is active (true), the output voltage drops from U
DC
=
24/U
DC
= 12V to U
DC
<3V.
②
The load resistance must be 2.2/1kΩ.