UL notice
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 | Application Beckhoff EtherCAT modules are intended for use with Beckhoff’s UL Listed EtherCAT System only. | |
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| Examination For cULus examination, the Beckhoff I/O System has only been investigated for risk of fire and electrical shock (in accordance with UL508 and CSA C22.2 No. 142). | |
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| For devices with Ethernet connectors Not for connection to telecommunication circuits. | |
Basic principles
UL certification according to UL508 with limited power consumption. The current consumed by the device is limited to a max. possible current consumption of 4 A. Devices with this kind of certification are marked by this sign:
Application
If terminals certified with restrictions are used, then the current consumption at 24 VDC 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.