Siemens SIMATIC S7-300 Series Reference Manual page 160

Standards, Certificates and Approvals
EMC Guidelines
SIMATIC products are designed for industrial use.
Area of Application
If you use the S7-300 in residential areas, you must ensure emission of radio
interference complies with Limit Class B as per EN 55011.
The following measures can be taken to achieve compliance with Limit Class B:
S Install the S7-300 in an earthed control/switch cabinet
S Fit filters to supply lines
UL Recognition
UL Recognition Mark
Underwriters Laboratories (UL) to
UL standard 508, Report 116536
CSA Certification
CSA-Certification-Mark
Canadian Standard Association (CSA) to
Standard C22.2 No. 142, File No. LR 48323
FM Approval
FM Approval to Factory Mutual Approval Standard Class Number 3611, Class I,
Division 2, Group A, B, C, D.
Warning
!
Personal injury or property damage can result.
In hazardous areas, personal injury or property damage can result if you withdraw
any connectors while an S7-300 is in operation.
Always isolate the S7-300 in hazardous areas before withdrawing connectors.
A-2
Industry EN 50081-2 : 1993
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
Requirements:
Emitted Immunity
interference
EN 50082-2 : 1995
A5E00111190-01