Connecting
6.3 Power supply
SCALANCE SC-600
54 Operating Instructions, 10/2021, C79000-G8976-C453-04
6.3 Power supply
Notes on the power supply
WARNING
When 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 32 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 the device to electromagnetic
interference is the "surge immunity test" according to EN 61000-4-5. 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.
Manufacturer: DEHN+SOEHNE GmbH+Co. KG, Hans-Dehn-Str.1, Postfach 1640,
D92306 Neumarkt, Germany
Operate the device with suitable overvoltage protection.
Note
The device can be disconnected from the power supply by pulling off the terminal bloc
k.
Information on the power supply
• The "L1" and "L2" LEDs indicate the current range of the power supply, see the
section "LED display (Page 30)".
• The power supply is connected using a 4-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. When a redundant power supply is used, the power supply unit
with the higher output voltage supplies the device alone.
• 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.
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