Connecting
6.4 Power supply
SCALANCE X-300
134 Operating Instructions, 02/2012, A5E01113043-12
Terminal block assignment (4-pin)
Table 6- 4 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.
6.4.2 100 to 240 VAC power supply
WARNING
Danger from line voltage
Devices with this mark have a 100 to 240 VAC power supply.
This product 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 VAC power supply do not have an ATEX approval.
Devices with a 100 to 240 V AC power supply are not approved for use in hazardous areas
according to EC-RL-94/9 (ATEX).
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