Appendix
BK11x0, BK125082 Version: 4.1
8.2 ATEX Documentation
Note
Notes about operation of the Beckhoff terminal systems in potentially explo-
sive areas (ATEX)
Pay also attention to the continuative documentation
Notes about operation of the Beckhoff terminal systems in potentially explosive areas
(ATEX)
that is available in the download area of the Beckhoff homepage http:\\www.beckhoff.com!
8.3 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
Two UL certificates are met in the Beckhoff EtherCAT product range, depending upon the components:
• UL certification according to UL508
Devices with this kind of certification are marked by this sign:
Almost all current EtherCAT products (as at 2010/05) are UL certified without restrictions.
• 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:
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. 4A (according to UL248) or
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