Technical data

Setting Up and Operating the Computing Unit
3-6
SIMATIC Panel PC 670 Computing Unit Equipment Manual
Edition 12/01
To completely disconnect the PC from the mains power supply, you must pull the
plug. This connection must be easily accessible. If the PC is to be installed in a
cabinet, a central disconnector must be provided.
Lay the cables so that no one can step on or trip over them. When connecting the
device, carefully study the pertinent information given in Chapter 2.
Never connect or disconnect power cables or data transmission lines during a
thunderstorm.
In an emergency situation (for instance, damage to the housing, controls or power
cable, penetration by liquids or foreign bodies), pull the power plug and contact the
authorized service department.
The computing unit must be switched off before connecting/disconnecting I/O
devices (keyboard, mouse, printer, etc.). Failure to do so can result in damage to
the computing unit.
A connector safety interlock is supplied with a 120 V/230 V power supply.
As an option, the computing unit can alternatively be equipped with a 24 V power
supply unit.
Country-Specific Notes
For the USA and Canada:
For operation in Canada and the United States, use CSA or UL-listed power
cables.
The connector must comply with the NEMA 5-15 specification.
120 V power supply
A flexible cable with UL approval and CSA marking and the following features must
be used: SJT design with three conductors, at least 18 AWG cross-section, a
maximum length of 4.5 meters and parallel grounding-type plug (15 A, at least
125 V).
230 V power supply
A flexible cable with UL approval and CSA marking and the following features must
be used: SJT design with three conductors, at least 18 AWG cross-section, a
maximum length of 4.5 meters and Tandem grounding-type plug (15 A, at least
250 V).
230 V supply voltage outside the USA and Canada
A flexible cable with the following features must be used: at least 18 AWG
cross-section and grounding-type plug (15 A, 250 V). The cables must conform to
the relevant safety guidelines of the country in which they are installed and bear
the specified markings.