Technical Specifications
A-23
C7-635 Control System
A5E00155581-04
A.5 Notes on Power Supply
24 VDC Supply
For the C7-635, the entire supply has to be generated with DC 24 V (operating
voltage, load voltage, relay supply, etc.) as Safety Extra-Low Voltage (SELV).
!
Warning
Personal injury and property damage can occur.
If you do not configure the 24 VDC power supply of the C7-635 correctly, you can
incur damage to the components of your automation system and personal injury.
For the 24 VDC power supply of the C7-635, use only safety extra-low voltage
(SELV).
A.6 Approvals
Approvals for USA and Canada
Note
Which one of the approvals (UL/CSA or cULus) listed below is relevant for your
product is indicated on the rating plate.
UL approval
Underwriters Laboratories Inc. to
• UL 508 (Industrial Control Equipment)
CSA approval
Canadian Standards Association to
• C22.2 No. 142 (Process Control Equipment)
or
Underwriters Laboratories Inc. to
S UL 508 (Industrial Control Equipment)
S CSA C22.2 No. 142 (Process Control Equipment)
Siemens Controls
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