Siemens ESM - Manual (Page 90)

Standards and Approvals
Industrial Ethernet OSM/ESM
86 C79000-Z8976-C068-10
FM Approval
FM Hazardous (Classified) Location Electrical Equipment:
Non Incendive / Class I / Division 2 / Groups A,B,C,D / T* and
Non Incendive / Class I / Zone 2 / Group IIC / T4
*) Temperature Class T4 or T4A, depending on model
! Warning
In hazardous areas liable to explosion, injury to persons and damage to property
can occur if you close or open an electric circuit while an OSM/ESM is in
operation.
Do not close or open live electrical circuits unless sure that there is no risk of
explosion.