Mounting and wiring
EK3100
21
Version: 1.5
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
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 2
compliant voltage supply!
These requirements apply to the supply of all EtherCAT bus couplers, power adaptor terminals, Bus
Terminals and their power contacts.
