Beckhoff EK15 Series - Page 70

Appendix
EK1122, EK15xx70 Version: 3.4
Almost all current EtherCAT products (as at 2010/05) are UL certified without restrictions.
Application
If terminals certified with restrictions are used, then the current consumption at 24V
DC
must be limited
accordingly by means of supply
• from an isolated source protected by a fuse of max. 4A (according to UL248) or
• from a voltage supply complying with NECclass2.
A voltage source complying with NECclass2 may not be connected in series or parallel with another
NECclass2compliant voltage supply!
These requirements apply to the supply of all EtherCAT bus couplers, power adaptor terminals, Bus
Terminals and their power contacts.