Mounting and wiring
EL28xx-xxxx 73Version: 2.2
4.6 Positioning of passive Terminals
Hint for positioning of passive terminals in the bus terminal block
EtherCAT Terminals (ELxxxx / ESxxxx), which do not take an active part in data transfer within the
bus terminal block are so called passive terminals. The passive terminals have no current consump-
tion out of the E-Bus.
To ensure an optimal data transfer, you must not directly string together more than 2 passive termi-
nals!
Examples for positioning of passive terminals (highlighted)
Fig.49: Correct positioning
Fig.50: Incorrect positioning
4.7 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 CSAC22.2 No.142).
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