UK
IO-Link master
25
Designation
Colour
Meaning
State
Description
RDY
Green/ yel-
low / red
Ready
Green ON
Device is ready for operation
Yellow
flashing
Firmware update is being performed
Green / yel-
low flashing
Overvoltage or undervoltage at U
S
Temperature of the device is in the critical
area
Failure of the actuator supply U
A
and red U
S
LED:
sensor supply overload
OFF
Device is not ready for operation
BF
Red
Bus Fault
Red ON
No link status available on any port
Red flashing
SF LED not flashing: Link status available,
no communication connection to the Profi-
Net controller
Red flashing
SF LED flashing: hardware watchdog has
been triggered
Red
Off
A ProfiNet controller has established an
active communication connection to the
ProfiNet device
SF
Red
Station Fail
Red ON
ProfiNet diagnostics available
Red flashing
Flashes only together with the BF LED;
watchdog triggered
Red OFF
ProfiNet diagnostics not available
US
Green /
red
U
sensors
Green ON
Communications power/sensor voltage
present
OFF
Communications power/sensor voltage not
present or too low
Red ON
Sensor voltage overload
UA
Green
U
actuators
ON
Actuator voltage present
OFF
Actuator voltage not present