6.7.1.3
Connecting the external 24 VDC power supply
24 V safety extra-low voltage (SELV)
WARNING
● The IE Switch X-300 is designed for operation with safety extra-low voltage (SELV). This
means that only SELV complying with IEC 60950-1 / EN 60950-1 / VDE0805 can be
connected to the power supply terminals.
● The power supply unit for the IE Switch X-300 power supply must meet NEC Class 2, as
described by the National Electrical Code(r) (ANSI/NFPA 70).
● 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
power supplies must meet these requirements.
● The signaling contact can be subjected to a maximum load of
100 mA (safety extra-low voltage (SELV) 24 VDC).
● Never operate the device with AC voltage or DC voltage higher than 58 VDC.
NOTICE
Damage to the device due to overvoltage
One of the tests used to attest the immunity of devices of the IE Switches X300 to
electromagnetic interference 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 no. 918 422 or a comparable protective element.
Manufacturer: DEHN+SÖHNE GmbH+Co.KG, Postfach 1640, D92306 Neumarkt, Germany.
Do not operate the SCALANCE X-300 without suitable overvoltage protection.
Connecting to the power supply (SELV)
● 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 IE Switch X-300 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.
Connecting
6.7 Power supply
SCALANCE XR-300M EEC
Compact Operating Instructions, 11/2019, A5E02661176-14
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Содержание SCALANCE XR324-4M EEC
Страница 10: ...Introduction SCALANCE XR 300M EEC 10 Compact Operating Instructions 11 2019 A5E02661176 14 ...
Страница 12: ...Safety notes SCALANCE XR 300M EEC 12 Compact Operating Instructions 11 2019 A5E02661176 14 ...
Страница 84: ...Index SCALANCE XR 300M EEC 84 Compact Operating Instructions 11 2019 A5E02661176 14 ...