ITEM C 3-Series - 12.2.5 EtherCAT interface

Technology modules
Page 159
Element
Function
LED 1
Two-colour-LED (green/red)
Run (green), link/activity EtherCAT port 1 (red),
EtherCAT active (yellow)
LED 2 (red) Link/activity EtherCAT port 2
12.2.5 EtherCAT interface
Table 56: Signal level and differential voltage
Signal level 0 ... 2.5 VDC
Differential voltage 1.9 ... 2.1 VDC