Operating Instructions (compact)
1.8 Connecting
SIMATIC HMI IPC577C
Operating Instructions (Compact), 05/2009, A5E02368077-01
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1.8.2
Connecting the 24 VDC power supply
To be noted before you connect the device
Note the following in order to operate the device safely and according to regulation:
WARNING
The device should only be connected to a 24 VDC power supply which satisfies the
requirements of safe extra low voltage (SELV). You will also have to connect a protective
conductor. The cable cross section has to match the short-circuit current of the 24 VDC
power supply so that the cable will not be damaged in case of a short circuit
Cable cross sections must range from a minimum of 1.3 mm² (AWG16) to a maximum of
3.3 mm² (AWG12).
NOTICE
The 24VDC power source must be adapted to the input data of the device.
NOTICE
If a CompactFlash card is used in the device, make sure that the card is seated correctly
before you connect it.
Connecting the devices
Steps for connecting the device to the 24 V DC power supply
1. Switch off the 24 V DC power source.
2. Connect the DC plug
(1) DC 24 V
(2) ground
(3) protective conductor
Power consumption
The power consumption at 24 V can be up to 90 W, depending on device.