
tests are carried out. We recommend that these tests be carried out and documented in
coordination with the responsible authorities.
System-specific ignition hazards
The criteria for the respective zonal classification are not harmonized and the assessment of
the operational risks, the local operating conditions and the various monitoring methods are not
standard. As a consequence, the remedial measures recommended by the supervisory
authorities may also differ depending on the authority's area of responsibility. The machine
manufacturer cannot provide general recommendations in this regard.
Note
Binding clarification of the local risks and of any required measures can only be provided by the
company operating the plant or system in agreement with the supervisory authority
responsible. The risk assessments from IEC / EN 60079-15 or -7 can be used to assess system-
specific ignition hazards.
Explosion hazard if the temperature class is exceeded
If a force-ventilated machine is operated without a separately driven fan, the temperature class
or the maximum surface temperature of the machine can be exceeded.
In an explosive atmosphere, there is a risk of an explosion. This can result in death, serious
injury or material damage.
● Install an interlock circuit that prevents the machine from being switched on if the separately
driven fan is not switched on/is not operational.
● Do not commission the machine without a separately driven fan.
Explosion hazard due to overheating of the machine caused by a layer of dust
Layers of dust thicker than 5 mm can lead to overheating of the machine due to their heat
insulating effect. The maximum surface temperature of the machine cannot be adhered to. The
dust can ignite, resulting in an explosion. This can result in death, serious injury or material
damage.
● Dust the machine regularly.
● Do not allow dust layers thicker than 5 mm to build up on the machine surface.
● Do not switch the machine on until the dust has been removed.
Operation
8.1 Safety instructions for operation
1MB5 SH 400/450
Operating Instructions, 05/2019, A5E45959221A
97
Содержание SIMOTICS XP 1MB5 SH400
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Страница 10: ...Table of contents 1MB5 SH 400 450 8 Operating Instructions 05 2019 A5E45959221A ...
Страница 64: ...Assembly 5 4 Aligning and fixing the machine 1MB5 SH 400 450 62 Operating Instructions 05 2019 A5E45959221A ...
Страница 106: ...Operation 8 8 Non operational periods 1MB5 SH 400 450 104 Operating Instructions 05 2019 A5E45959221A ...
Страница 154: ...Disposal 11 5 Disposal of components 1MB5 SH 400 450 152 Operating Instructions 05 2019 A5E45959221A ...
Страница 156: ...Service support 1MB5 SH 400 450 154 Operating Instructions 05 2019 A5E45959221A ...
Страница 160: ...Quality documents 1MB5 SH 400 450 158 Operating Instructions 05 2019 A5E45959221A ...
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Страница 166: ...Germany More information www siemens com drives Siemens AG Digital Industries Postfach 48 48 90026 NÜRNBERG ...