Positioning Of Passive Terminals; Ul Notice; Fig. 25 Correct Positioning; Fig. 26 Incorrect Positioning - Beckhoff EL1052 Documentation

4.5

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. 25: Correct positioning
Fig. 26: Incorrect positioning
4.6

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).
EL1052, EL1054 Version: 1.1
Mounting and wiring
33