Siemens Simatic S7-300 Technical Data Manual page 4

Preface
Note
There you can obtain the descriptions of all current modules. For new modules, or modules
of a more recent version, we reserve the right to include a Product Information containing
latest information.
Approvals
The SIMATIC S7-300 product series has the following approvals:
• Underwriters Laboratories, Inc.: UL 508 (Industrial Control Equipment)
• Canadian Standards Association: CSA C22.2 No. 142, (Process Control Equipment)
• Factory Mutual Research: Approval Standard Class Number 3611
CE label
The SIMATIC S7-300 product series satisfies the requirements and safety specifications of
the following
EC Directives:
• EC Directive 73/23/EEC "Low-voltage directive"
• EC Directive 89/336/EEC "EMC directive"
C tick mark
The SIMATIC S7-300 product series is compliant with AS/NZS 2064 (Australia).
Standards
The SIMATIC S7-300 product series is compliant with IEC 61131-2.
iv
CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05