Connecting Devices With 24 Vdc Power Supply; 24 Vdc - Xr-300M Poe Product Group; Connecting The External 24 Vdc Power Supply - Siemens SCALANCE XR324-4M PoE Compact Operating Instructions

5.5.2

Connecting devices with 24 VDC power supply

5.5.2.1

24 VDC - XR-300M PoE product group

Table 5- 2
Device
XR324-4M PoE
See also
Connecting devices with 100 to 240 VAC power supply (Page 51)
5.5.2.2

Connecting the external 24 VDC power supply

24 V safety extra-low voltage (SELV)
Safety extra low voltage
The equipment is designed for operation with a directly connected safety extra-low voltage
(SELV). (This does not apply to 100 V to 240 V devices.)
The maximum current via the 24 V terminals is 8 A. You should therefore include a fuse
that trips at a current higher than 8 A. The fuse must meet the following requirements:
• Suitable for DC (min. 60 V / max. 8 A)
• Breaking current at least 10 kA
• UL/CSA listed (UL 248-1 / CSA 22.2 No. 248.1)
• Classes R, J, L, T or CC
As an alternative, the following requirements:
• Suitable for DC (min. 60 V / max. 8 A)
• Breaking current at least 10 kA
• Approved in compliance with IEC 60127-1 / EN 60127-1
• Breaking characteristics: B or C for a circuit breaker or slow-blow fuse
SCALANCE XR-300M PoE
Compact Operating Instructions, 05/2016, A5E02661178-10
24 VDC safety extra-low voltage overview
WARNING
Device version (power supply)
1 x 24 VDC
1 x 24 VDC
Connecting up
5.5 Power supply
24 V safety extra-low voltage
(SELV)
can be connected redundantly
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