Siemens SCALANCE X-200 - Manual (Page 53)

Product Characteristics
4.5 SCALANCE X204-2
Range
The maximum transmission range (segment length) is 3 km.
Connectors
The cables are connected over BFOC sockets.
4.5.6 SCALANCE X204-2 Power Supply and Signaling Contact
Power Supply
The power supply is connected using a 4-pin plug-in terminal block. The power supply can
be connected redundantly. Both inputs are isolated. There is no distribution of load. When a
redundant power supply is used, the power supply unit with the higher output voltage
supplies the SCALANCE X204-2 alone. The power supply is connected over a high
resistance with the enclosure to allow an ungrounded set up.
Figure 4-14 SCALANCE 204-2 Power Supply
Warning
The SCALANCE X204-2 is designed for operation with safety extra-low voltage. This means
that only safety extra-low voltages (SELV) complying with IEC950/EN60950/ VDE0805 can
be connected to the power supply terminals.
The power supply unit to supply the SCALANCE X204-2 must comply with NEC Class 2
(voltage range 18 - 32 V, current requirement 350 mA)
If the device is connected to a redundant power supply (two separate power supplies), both
must meet this requirement.
The signaling contact can be subjected to a maximum load of 100 mA (safety extra-low
voltage (SELV), DC 24 V).
Never connect the SCALANCE X204-2 to AC voltage or DC voltage higher than 32 V DC.
Industrial Ethernet SCALANCE X-100 and SCALANCE X-200 Product Line
Commissioning Manual, 1,
4-39