Siemens SIMATIC NET CP 442-1 RNA Equipment Manual page 37

Power supply
The device is designed for operation with a directly connectable safety extra low voltage
(SELV) from a limited power source (LPS).
The power supply therefore needs to meet at least one of the following conditions:
• Only safety extra low voltage (SELV) with limited power source (LPS) complying with IEC
• The power supply unit for the device must meet NEC Class 2 according to the National
If the equipment is connected to a redundant power supply (two separate power supplies),
both must meet these requirements.
The steps for installing the CP are explained below.
Result: The CP is installed in the rack and the interfaces have been networked.
Follow the steps outlined below:
1. Plugging in the CP:
Fit the CP onto the rack from the top and push it in at the bottom.
The CP can be operated in central or universal racks.
Note
K bus link
When using the universal rack UR1 or UR2 as an expansion rack, a communication bus link
is necessary!
2. Secure the CP with screws.
3. Turn on the power supply.
4. Connect the CP to Industrial Ethernet via one of the RJ45 jacks.
See also
Network settings (Page 46)
CP 442-1 RNA
Equipment Manual, 03/2022, C79000-G8976-C318-05
WARNING
60950-1 / EN 60950-1 / VDE 0805-1 or IEC 62368-1 / EN 62368-1 / VDE 62368-1 may be
connected to the power supply terminals.
Electrical Code (r) (ANSI / NFPA 70).
Installation, wiring, commissioning, removal
5.3 Installing and connecting
37