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4.3  Display elements
Fig. 4-3: 
DIO
XF2XF1
LINK
ACT
LINK
ACT
BF
ERR
SF
RUN
X01
X02
01
00
01
00
UAUS
BNI XG3-508-0C5-Z015
BNI00K8
Status LEDs
Port/Pin LEDs:  
Status of IO-Link and 
I/O-Ports
Display elements
Port/Pin LEDs
–  LED00 – Port-Pin 4
–  LED01 – Port-Pin 2
Port/Pin LEDs Standard Port
Signal Meaning
Off State of input or output pins is 0
Yellow State of input or output pins is 1
Both LEDs 
red flashing
Short circuit of sensor supply between 
pin1 and pin3
Red Short circuit at output on pin2/4 against 
pin3
Red No high signal at diagnostic input
Red 24 V input signal on configured output 
(actuator warning)
Tab. 4-1:  LEDs Standard Port
Port/Pin LEDs IO-Link Port
Signal Meaning
Green IO-Link connection active
Green 
flashing
No IO-Link connection or incorrect 
IO-Link device
Green, fast 
flashing
IO-Link: Preoperate during data storage
Red, fast 
flashing
Validation failed / incorrect configuration 
of the IO-Link data length
Red, fast 
flashing
Data storage failed / incorrect device for 
data storage
Red IO-Link: Short circuit of pin4 against 
pin3
Tab. 4-2:  LEDs IO-Link Port
Status LEDs
BNI PG3-508-0C5-Z015 (Profinet)
LED Signal Meaning
US Green Input voltage OK
Red flashing Input voltage low (<18V)
UA Green Output voltage OK
Red flashing Output voltage low (<18V)
Red No output voltage present 
(<11V)
SF Off No error
Red Watchdog timeout; channel, 
general or extended diagnostics 
present; system error
Red flashing Service DCP signal started via 
bus
BF Off No error
Red Low speed of physical link; or no 
physical link
Red flashing No data exchange or no 
configuration
100 Off Transmission rate: 10Mbit/s
Yellow Transmission rate: 100Mbit/s
LK1/2 Green 
flashing
Data transfer
Tab. 4-3:  Status LEDs Profinet
4
  Product description (continued)
BNI  _ G3-508-0C5-Z015
Network interface