Connecting
5.3 Connecting the (24 V) DC power supply
SIMATIC HMI IPC677C
Operating Instructions, 04/2013, A5E02722710-04
49
5.3 Connecting the (24 V) DC power supply
Note before connecting the device
WARNING
The device should only be connected to a 24 V DC power supply which meets the
requirements of safe extra low voltage (SELV) according to IEC/EN/DIN EN/UL 60950-1. A
protective conductor must also be used. 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).
Note
The 24 V 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 DC 24 V
② ground
③ protective conductor
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