Poe Power Supply Of The Pe408Poe - Siemens SIMATIC NET Operating Instructions Manual

Connecting up

5.2 PoE power supply of the PE408PoE

Safety notices when using the device according to ATEX
If you use the device under ATEX conditions you must also keep to the following safety
notices in addition to the general safety notices for protection against explosion:
Take measures to prevent transient voltage surges of more than 40% of the rated voltage.
This is the case if you only operate devices with SELV (safety extra-low voltage).
5.2 PoE power supply of the PE408PoE
Notes on the PoE power supply
Incorrect power supply
The power of all connected power supply units must total the equivalent of a power source
with limited power (LPS limited power source).
If the device is connected to a redundant power supply (two separate power supplies), both
must meet these requirements.
Never operate the device with AC voltage or DC voltage higher than 60 V DC.
Information on the PoE power supply
● You can connect a different PoE power source to each of the two connectors. This means
that devices capable of PoE can be supplied with power via the ports, see section "Power
over Ethernet (PoE) (Page 20)".
● The power supply is connected using two 2-pin plug-in terminal blocks (spring-loaded
terminal). The terminal blocks ship with the device.
● For the PE408PoE to be able to supply a powered device, the connected PoE power
supply must provide a voltage of 54 V.
● The terminal block L1+/M1 provides the PoE power supply of ports P1 to P4. The
terminal block L2+/M2 provides the PoE power supply of ports P5 to P8.
● To wire up the power connector, use a copper cable of category 18-12 AWG or cable with
a cross-section of 0.75 to 2.5 mm².
● The cable for connecting the power source to the connectors L1+/M1 or L2+/M2 can be a
maximum of 3 m long.
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WARNING
WARNING
Extender for SCALANCE XM-400
Operating Instructions, 05/2014, C79000-G8976-C332-03