Siemens SIMATIC S7-300 Manual page 21

Note
Currently valid certifications can be found on the rating of the relevant module.
FM certification
Factory Mutual Research (FM) to
Approval Standard Class Number 3611, 3600, 3810
APPROVED for use in Class I, Division 2, Group A, B, C, D Tx;
Class I, Zone 2, Group IIC Tx
to EN 60079-15:2003 (Electrical apparatus for potentially explosive atmospheres; Type of
protection "n")
Tick-mark for Australia
The S7-300 automation system satisfies requirements of standards to
AS/NZS 2064 (Class A).
IEC 61131
The S7-300 automation system satisfies requirements and criteria to
IEC 61131-2 (Programmable Controllers, Part 2: Equipment Requirements and Tests.)
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
II 3 G EEx nA II Parts 4..6
General technical data
1.1 Standards and certifications
1-3