Siemens SIMATIC Box PC 620 Manual page 43

Power Connection
The device is intended for poeration in grounded electricity supply systems
(TN systems to VDE 0100 part 300 or IEC 364-3).
Service in non-grounded or impedance-grounded supply systems (IT systems) is
not intended.
The power line should meet the respective local safety requirements.
Check whether the device's set supply voltage is the same as the local supply
voltage.
This device is equipped with a safety-tested power supply cable. You may connect
this device only to a grounding outlet with a grounding contact.
Make certain that the socket outlet on the device or the grounding contact for the
building wiring system is freely accessible and as near to the device as possible.
The mains switch does not separate the device from the power system. To
establish a complete power separation, you must disconnect the power plug (inlet
connector on the back of the device). This location must be accessible. A central
isolating switch must be present for cabinet mounting.
Install the cables so that no one can step on them or trip over them. When you
connect the device, adhere to the relevant instructions in Chapter 2 of this manual.
Do not connect or disconnect power supply cables and data transmission lines
during thunderstorms.
In emergency situations (for example, damaged housing, damaged operator
elements, a damaged power supply cable, ingress of liquids or foreign particles),
switch off the device. Disconnect the power plug and inform the responsible
service personnel.
The SIMATIC Box PC 620 must be switched off when you connect or disconnect
I/O devices (keyboard, mouse, printer, etc.). You can damage the PC if you do not
adhere to these instructions.
When plugging in/unplugging peripheral connections (keyboard, mouse, printer
etc.) the SIMATIC box PC 620 must be switched off (not for PC-Card and USB-
devices). In the case of non-observance, this can lead to damage to the PC.
SIMATIC Box PC 620 Manual
C79000-G7076-C639-04
Setting Up and Operating the SIMATIC Box PC 620
4-3