Installation, Connecting Up, Commissioning; Important Notes On Using The Device - Siemens SINAUT ST7 System Manual

Installation, connecting up, commissioning

Note
Keep to the installation guide of the SIMATIC S7-300
Modules must be installed according to the installation guidelines of SIMATIC S7-300. You
can find information on installation and wiring up in the operating instructions "SIMATIC
S7-300, CPU 31xC and CPU 31x: Installation", see /2/ (Page 129).
Safety notices on the use of the device
Note the following safety notices when setting up and operating the device and during all
associated work such as installation, connecting up or replacing the device.
4.1

Important notes on using the device

Overvoltage protection
NOTICE
Protection of the external power supply
If power is supplied to the module or station over longer power cables or networks, the
coupling in of strong electromagnetic pulses onto the power supply cables is possible. This
can be caused, for example by lightning strikes or switching of higher loads.
The connector of the external power supply is not protected from strong electromagnetic
pulses. To protect it, an external overvoltage protection module is necessary. The
requirements of EN61000-4-5, surge immunity tests on power supply lines, are met only
when a suitable protective element is used. A suitable device is, 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 Postfach 1640 D-92306 Neumarkt,
Germany
Signal cables
Ethernet cables and dedicated copper lines are highly susceptible to electromagnetic
interference. Coupling of extraneous voltages can be inductive or capacitive, for example
due to the effects of lightning. Direct conductive coupling is also possible due to bad
insulation.
The overvoltage protection modules limit extraneous voltage and overvoltage to a non-
critical level.
SINAUT ST7 - Volume 1
System Manual, 11/2018, C79000-G8976-C178-12
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