Beckhoff EK18 Series Documentation page 55

LEDs for fieldbus diagnostics
LED Display
LINK / gree off
ACT n
on
(X1 IN)
flashing
LINK / gree off
ACT n
on
(X2 OUT)
flashing
LINK / gree off
ACT E- n
on
bus
flashing
LEDs for diagnostics of the digital inputs and outputs
LED
INPUT** green
OUTPUT** green
**) depending on version
EK18xx
State Description
- No connection on the incoming EtherCAT strand
linked Preceding EtherCAT device connected
active Communication with preceding EtherCAT device
- No connection on the incoming EtherCAT strand
linked Following EtherCAT device connected
active Communication with following EtherCAT device
- no connection to internal E-bus
linked Connection to internal E-bus
active Connection/communication internal E-bus
Display Description
off Signal voltage "0" (-3 V ... 5 V)
on Signal voltage "1" (11 V ... 30 V)
off No output signal
on 24 V
Version: 2.2
output signal at the respective output
DC
Error handling and diagnostics
55