Siemens PC 670 Manuel de service Page 33

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Setting Up and Operating the Computing Unit
3-5
SIMATIC Panel PC 670 Computing Unit Equipment Manual
Edition 12/01
3.3 Connecting the Computing Unit to the Power Supply
Connecting to the power supply
The computing unit can be operated using the device socket for non-heating
appliances on 120 V and 230 V power systems. Voltage changeover is
automatic.
1. Insert the power supply cable supplied with the device into the device socket for
non-heating appliances.
2. Connect the mains lead to a socket having a grounded protective ground
conductor.
3. The device is then prepared for mains operation and operating.
Power supply connection
Device socket for non-heating appliances
Figure 3-3 Power Supply Connection (Device Socket for Non-Heating Appliances )
Mains supply
The device is intended for connection to grounded power supply systems
(TN networks to VDE 0100, Part 300, or IEC 364-3).
No provision is made for connection to non-grounded or impedance-grounded
power supply systems (IT networks).
The power cable should comply with the safety guidelines of the country
concerned.
Check to make sure that the rated voltage for the device is the same as the local
mains voltage.
This device is equipped with a safety-tested power supply cable and may be
connected only to a socket outlet with grounding contact.
Make sure that the socket outlet on the device or the socket outlet with grounding
contact of the building wiring system is freely accessible and located as near to the
device as possible.
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