LEDs
End cap with
integrated
LED
Possible cause
Troubleshooting
OSSD Fiel
d
Diagnostics LEDs
1
2
3
4
5
6
7
8
O
Red
Ö
Red
o
o
o
Ö
Red
o
o
o
o
Ö
Red
A wiring fault has
been identified at
the OSSDs or at
an input.
E.g., at an OSSD:
overvoltage, short-
circuit, cross-cir‐
cuit, permissible
load capacity
exceeded.
E.g., at an input:
invalid signal,
unexpected signal.
b
Check the system
wiring for a fault.
Make sure that the
OSSDs and inputs
have been wired
correctly,
gration in electrical
control", page 54
b
Switch the voltage
supply off and back
on again.
b
If the fault con‐
tinues to persist,
replace the defec‐
tive components,
see "Ordering infor‐
mation", page 150
.
O
Red
Ö
Red
o
Ö
Red
Ö
Red
o
o
o
o
o
Ö
Red
A wiring fault has
been detected.
b
Check the system
wiring for a fault.
b
Make sure that the
IO-link interface was
wired correctly.
b
Switch the voltage
supply off and back
on again.
O
Red
Ö
Red
Ö
Red
o
Ö
Red
o
o
o
o
o
Ö
Red
Incompatible
device detected.
b
For a sender-
receiver connection,
ensure that the
sender and receiver
devices are compat‐
ible,
tion of sender and
receiver", page 59
b
Ensure that the con‐
nected sender devi‐
ces as well as the
connected receiver
devices in a cas‐
cade are compat‐
ible,
O
Red
Ö
Yel‐
low
EDM warning (only
if the external
device monitoring
function is active):
The OSSDs have
constantly been in
the OFF state
since the safety
light curtain was
switched on and
no signal is
present at the
EDM input.
Normally, this message
is displayed only briefly
after switching on and
goes out as soon as
the voltage supply for
the auxiliary contacts is
established at the con‐
tactors. If the message
is displayed for longer:
b
Check the contac‐
tors.
b
Check the wiring of
the contactors.
b
Switch the voltage
supply off and back
on again.
TROUBLESHOOTING
11
8021645/1EB0/2022-04-28 | SICK
O P E R A T I N G I N S T R U C T I O N S | deTec4
135
Subject to change without notice
