![Siemens SCALANCE XR-300M PoE Series Compact Operating Instructions Download Page 61](http://html.mh-extra.com/html/siemens/scalance-xr-300m-poe-series/scalance-xr-300m-poe-series_compact-operating-instructions_383841061.webp)
Terminal block assignment (4-pin)
Table 6-3
Pinout of the 24 V safety extra-low voltage (SELV)
Pin number
Assignment
Labeling (example)
Pin 1
L1+ (24 VDC)
Pin 2
M1
Pin 3
M2
Pin 4
L2+ (24 VDC)
To wire up the power connector, use a copper cable of category 20-12 AWG or cable with a cross-
section of 1.0 to 2.5 mm².
6.7.2
Connecting devices with 100 to 240 VAC power supply
Safety note on devices with 100 to 240 V AC power supply
WARNING
Danger from line voltage
The supply voltage for the devices listed is 100 to 240 V AC.
This device can only function correctly and safely if it is transported, stored, set up, and installed
correctly, and operated and maintained as recommended.
Connecting and disconnecting may only be performed by an electrical specialist.
Connect or disconnect power supply cables only when the power is turned off.
WARNING
Devices with a 100 to 240 V AC power supply do not have an ATEX or IECEx approval.
Devices with a 100 to 240 V AC power supply are not approved for use in hazardous areas
according to 2014/34/EU ATEX or IECEx.
Connecting up
6.7 Power supply
SCALANCE XR-300M PoE
Compact Operating Instructions, 03/2022, A5E02661178-15
61