Ul Notice - Beckhoff EK3100 Documentation

3.4

UL notice

Application
Beckhoff EtherCAT modules are intended for use with Beckhoff's UL Listed EtherCAT Sys-
tem only.
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).
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 V
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.
EK3100 Version: 1.5
Mounting and wiring
must be limited
DC
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