Connecting Devices With 24 V Dc Power Supply; Connecting The External 24 Vdc Power Supply - Siemens SCALANCE XR324-4M EEC Operating Instructions Manual

Connecting
5.4 Power supply
5.4.2

Connecting devices with 24 V DC power supply

Table 5- 3
Device
XR324-4M EEC
5.4.2.1

Connecting the external 24 VDC power supply

24 V safety extra-low voltage (SELV)
• The IE Switch X-300 is designed for operation with safety extra-low voltage (SELV).
• The power supply unit for the IE Switch X-300 power supply must meet NEC Class 2, as
• The power of all connected power supply units must total the equivalent of a power
• If the device is connected to a redundant power supply (two separate power supplies),
• The signaling contact can be subjected to a maximum load of
• 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.
40
24 to 48 VDC safety extra-low voltage overview
Device version
(power supply)
1 x 24 to 48 VDC
2 x 24 to 48 VDC
WARNING
This means that only SELV complying with IEC 60950-1 / EN 60950-1 / VDE0805 can
be connected to the power supply terminals.
described by the National Electrical Code(r) (ANSI/NFPA 70).
source with limited power (LPS limited power source).
both power supplies must meet these requirements.
100 mA (safety extra-low voltage (SELV) 24 VDC).
24 V safety extra-low voltage
(SELV)
can be connected redundantly
SCALANCE XR-300M EEC
Operating Instructions, 11/2015, A5E02661176-09
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