Installation and commissioning of the modems and routers
5.3 GSM/GPRS modem MD720-3
SINAUT ST7 station control system
System Manual, 09/2016, C79000-G8976-C178-10
143
General notices on use in hazardous areas according to ATEX
WARNING
Requirements for the cabinet/enclosure
When used in hazardous environments corresponding to Class I, Division 2 or Class I,
Zone 2, the device must be installed in a cabinet or a suitable enclosure.
To comply with EU Directive 94/9 (ATEX95), this enclosure must meet the requirements of
at least IP54 in compliance with EN 60529.
WARNING
Suitable cables for temperatures in excess of 70 °C
If the cable or conduit entry point exceeds 70 °C or the branching point of conductors
exceeds 80 °C, special precautions must be taken. If the equipment is operated in an air
ambient between 50 °C and 70°C, only use cables with admitted maximum operating
temperature of at least 80 °C.
WARNING
Protection against transient voltage surges
Provisions shall be made to prevent the rated voltage from being exceeded by transient
voltage surges of more than 40%. This criterion is fulfilled, if supplies are derived from
SELV (Safety Extra-Low Voltage) only.
5.3
GSM/GPRS modem MD720-3
Introduction
The following section describes the design of the MD720-3 modem, its connectors and
display elements.
Note that the SINAUT MD720-3 has been replaced by the successor product MODEM
Содержание SIMATIC NET TeleControl SINAUT ST7
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