Siemens SIMOTICS XP 1MB155, Operating Instructions Manual

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Safety information
2.12 Special designs and construction versions
1MB155 / 1MB555
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Operating Instructions, 03/2018, A5E41926185A
2.12 Special designs and construction versions
Note
Before carry out any work on the machine, determine the machine version.
If there are any deviations or uncertainty, contact the manufacturer, specifying the type
designation and serial number (see the rating plate), or contact the Service Center.
2.13 Special conditions for explosion-proof machines
Special conditions for the safe application of explosion-proof machines marked with X
(excerpt from the EC type-examination certificate, point 17).
Dust explosion protection "tb"
● Do not operate the motors with excessively thick deposits of dust.
● When the motors are mounted with the free shaft end pointing upwards, prevent foreign
bodies from dropping into the ventilation openings using an appropriate mechanical
design.
● For motors with a fixed connecting cable: The free end of the cable must be connected
according to valid regulations for electrical installations.
Flameproof enclosure "db"
Flameproof joints may only be repaired strictly in accordance with the manufacturer's design
specifications. Repair in accordance with the values in Table 3 of EN/IEC 60079-1: 2014 is
not permitted.
For closing the flameproof compartment, bolts with a tensile strength of at least 700 N/mm²
are permissible.