Siemens SIMATIC Box PC 627, Руководство по эксплуатации

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Connecting
6.3 Connecting the (24 V) DC power supply
SIMATIC Box PC 627
6-4
Operating Instructions, Release 05/2006, A5E00362052-03
6.3
6.3
Connecting the (24 V) DC power supply
Note before connecting
Warning
Only connect the device to 24 V DC power supply systems which meet the requirements of a
safe extra-low voltage (SELV); in addition, a protective conductor must be connected. The
conductors must withstand the short-circuit current of the 24 V DC power source, so that a
short-circuit will not damage the cable. Only connect cables with a minimum cross-section of
1.3 mm
2
(AWG16) and a maximum cross-section of 3.3 mm
2
(AWG12).
Notice
The 24V DC power source must be adapted to the input data of the device (see
specifications).
Connecting
Steps for connecting the device to the 24 V DC power supply
1. Ensure that the ON/OFF switch is in the '0'
(OFF) position to prevent unintentional startup
of the device when connecting it to the 24 V
power supply.
2. Switch off the 24 V DC power source.
3. Insert the DC power plug.
(1) 24 V DC
(2) ground
(3) protective conductor