Safety Extra Low Voltage (SELV) and Protective Extra Low Voltage (PELV)
To ensure electrical safety of AC500/AC500-eCo extra low voltage circuits, 24
V DC supply, communication interfaces, I/O circuits, and all connected devices
must be powered from sources meeting requirements of SELV, PELV, class 2,
limited voltage or limited power according to applicable standards.
WARNING!
Improper installation can lead to death by touching hazardous voltages!
To avoid personal injury, safe separation, double or reinforced insulation and
separation of the primary and secondary circuit must be observed and imple-
mented during installation.
–
Only use power converters for safety extra-low voltages (SELV) with safe
galvanic separation of the primary and secondary circuit.
–
Safe separation means that the primary circuit of mains transformers must
be separated from the secondary circuit by double or reinforced insulation.
The protective extra-low voltage (PELV) offers protection against electric
shock.
2.6.1.5
Electromagnetic compatibility
Table 198: Range of use
Parameter
Value
Industrial applications
Yes
Domestic applications
No
Table 199: Immunity against electrostatic discharge (ESD), according to IEC 61000-4-2, zone B,
criterion B
Parameter
Value
Electrostatic voltage in case of air discharge
8 kV
Electrostatic voltage in case of contact dis-
charge
4 kV, in a closed switchgear cabinet 6 kV
1
)
ESD with communication connectors
In order to prevent operating malfunctions, it
is recommended, that the operating personnel
discharge themselves prior to touching com-
munication connectors or perform other suit-
able measures to reduce effects of electro-
static discharges.
ESD with connectors of terminal bases
The connectors between the Terminal Bases
and processor modules or Communication
Modules must not be touched during opera-
tion. The same is valid for the I/O bus with all
modules involved.
1
) High requirement for shipping classes are achieved with additional specific measures (see
specific documentation).
System assembly, construction and connection
AC500 (Standard) > System data AC500
2022/01/31
3ADR010278, 3, en_US
974