Connection
6.3 Connecting the power supply
SIMATIC MV500
Operating Instructions, 06/2018, C79000-G8976-C494-01
77
6.3
Connecting the power supply
Connecting the power supply
WARNING
Permissible power supply
The device should only be connected to a 24 V DC power supply which satisfies the
requirements of safe extra low voltage (SELV).
When the device is operated on a wall, in an open rack or other similar locations, an NEC
Class 2 voltage source is needed for compliance with UL requirements (according to
UL 62368-1). In all other cases (according to IEC/EN/DlN EN 62368-1), a voltage source
with limited power (LPS = Limited Power Source) is required.
Line-side power supply
The generation of the 24 V DC power supply by a line-side power supply must be
implemented as functional extra-low voltage with safe electrical isolation (floating)
according to IEC 60364-4-41, or as SELV according to IEC/EN/DlN EN 62368-1 and
LPS/NEC Class 2.
NOTICE
Protection of the external power supply
If the optical reader is supplied via extensive supply lines or networks, interference by
strong electromagnetic pulses on the supply lines is possible, e.g. from lightning or the
switching of large loads.
The connection of the external power supply is not protected against strong
electromagnetic pulses. An external overvoltage protection module is required for this
purpose. The requirements according to EN 61000-4-5, Surge test on power supply lines,
are only met when a suitable protective element is used. A suitable device would be, for
example, the Dehn Blitzductor BVT AVD 24, article number 918 422, or a comparable
protective element.
Manufacturer:
DEHN+SOEHNE GmbH+Co.KG, Hans-Dehn-Str.1, P.O. Box 1640, D-92306 Neumarkt,
Germany
NOTICE
Maximum torque for M12 knurled screws
Make sure to tighten the knurled screw of the M12 connector with
≃
1 Nm to prevent
ingress of moisture.
Содержание SIMATIC MV540 H
Страница 24: ...Description 1 7 Functional description SIMATIC MV500 24 Operating Instructions 06 2018 C79000 G8976 C494 01 ...
Страница 194: ...Service and maintenance 10 3 Replacing a module SIMATIC MV500 194 Operating Instructions 06 2018 C79000 G8976 C494 01 ...
Страница 232: ...Appendix A 3 Alternative user interfaces SIMATIC MV500 232 Operating Instructions 06 2018 C79000 G8976 C494 01 ...
Страница 236: ...List of abbreviations SIMATIC MV500 236 Operating Instructions 06 2018 C79000 G8976 C494 01 ...
Страница 238: ...Service Support SIMATIC MV500 238 Operating Instructions 06 2018 C79000 G8976 C494 01 ...