Mounting, connecting up and commissioning
3.2 Installing and commissioning the RF120C
SIMATIC RF120C
12 Operating Instructions, 02/2021, C79000-G8976-C328-03
Overvoltage protection
Protection of the external 24 VDC voltage supply
If the module is supplied via widespread 24 V power supply cables or networks, coupling of
strong electromagnetic pulses into the power supply cables is possible, for example due to
lightning or the switching of large loads.
The connection of the external 24 VDC power supply is not protected against strong
electromagnetic pulses. Make sure that any cables liable to lightning strikes are fitted with
suitable overvoltage protection.
3.2 Installing and commissioning the RF120C
Prior to installation and commissioning
Read the system manual "S7-1200 Programmable Controller"
Prior to installation, connecting up and commissioning, read the relevant sections in the
system manual "S7-1200 Programmable Controller". When installing and connecting up,
keep to the procedures described in the system manual "S7-1200 Programmable Controller".
Make sure that the power supply is turned off when installing/uninstalling the devices.
Parameter assignment
One requirement for the commissioning of the CP is the completeness of the STEP 7 project
data. For more information, read the section "Configuration and parameter assignment
(Page 21)".
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