Siemens SCALANCE XB-100 Series, Operating Instructions Manual

Page: 28 / 54

5.4 Power supply
Notes on the power supply
WARNING
Incorrect power supply
The power supply unit for supplying the devices must comply with NEC Class 2 or LPS:
● Voltage range 19.2 - 28.8 V for AC or DC
● Power consumption max. 450 mA for AC
● Power consumption max. 300 mA for DC
Do not operate the devices with AC voltages higher than 28.8 V AC.
Do not operate the devices with DC voltages higher than 28.8 V DC.
CAUTION
Damage to the device due to overvoltage
The connector of the external power supply is not protected against strong electromagnetic
pulses that can, for example, result from lightning strikes or switching large loads.
One of the tests used to attest the immunity of devices of the IE switches SCALANCE XB-100
to electromagnetic interference, among others, is the "surge immunity test" according to
EN61000-4-5. This test requires overvoltage protection for the power supply lines. A suitable
device is, for example, the Dehn Blitzductor BVT AVD 24, article number 918 422 or a
comparable protective element. An example of a suitable device for AC operation is the
Blitzductor BXT ML2 BD S 48, art. no. 920 245, in combination with the basic unit BXT BAS,
art. no. 920 300, or a comparable protective element.
Manufacturer: DEHN+SOEHNE GmbH+Co.KG, Hans-Dehn-Str.1, Postfach 1640, D92306
Neumarkt, Germany
Operate the SCALANCE XB-100 with suitable overvoltage protection.
Information on the power supply
● The power supply is connected using a 3-pin plug-in terminal block (spring-loaded terminal).
The terminal block ships with the device and can also be ordered as a spare part.
● The power supply can be connected redundantly. Both inputs are isolated. There is no
distribution of load.
● The power supply is connected over a high resistance with the enclosure to allow an
ungrounded set up. The two power inputs are non-floating.
● Note the wiring rules.
Connecting up
5.4 Power supply
SCALANCE XB-100
28
Operating Instructions, 02/2019, C79000-G8976-C473-03