Siemens Simatic 620 - Manual (Page 14)

Important Information
1-2
SIMATIC Box PC 620 Manual
A5E00131465-01
Power Connection
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.
When plugging in/unplugging peripheral connections (keyboard, mouse, printer
etc.) the Box PC 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.
Notes for Devices with AC Power Supply
The device is intended for service 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 cord 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.
Notes for Devices with DC Power Supply
The device with DC power supply (24V DC) is an open device (right side of the
device), therefore the mounting must meet the requirements of fire protection
enclosures.
!
Warnung
Only connect the device to 24V DC power supply systems which meet the requirements of a
safe extra-low voltage (SELV).
The cable cross section has to be large enough that the Box PC will not be damaged by the
cables when there is a short circuit.