Further topics
•
•
•
"Sequential muting V1", page 95
•
4.4.3
Notes on wiring
If muting functions are to be implemented, potential errors must be taken into account
as part of the wiring process. If certain signal combinations are to be transmitted via
the same cable, additional precautions must be taken to ensure that the respective
signals are correct. Suitable measures must be implemented (e.g., protected cable
laying) to make sure that no errors can occur as a result of this wiring.
Table 5: Muting wiring combinations and requirements
Signal
A1
A2
B1
B2
C1
Band si
gnal
ESP
E
O
ver
ride
Enable
Mut
in
g lam
p
Mut
in
g s
ta
tus
O
ver
ride r
eq
uir
ed
A1
–
A
B
B
A
A
A
A
A
A
A
C
A2
A
–
B
B
A
A
A
A
A
A
A
C
B1
B
B
–
A
A
A
A
A
A
A
A
C
B2
B
B
A
–
A
A
A
A
A
A
A
C
C1
A
A
A
A
–
A
A
A
A
C
C
C
Band signal
A
A
A
A
A
–
C
A
A
C
C
C
ESPE
A
A
A
A
A
C
–
C
A
C
C
C
Override
A
A
A
A
A
A
C
–
A
A
C
A
A
The specified signals may only be installed in the same cable if a short-circuit
between these signals can be excluded, e.g., by means of protected cable laying.
B
The specified signals may only be installed in the same cable if sequence monitor‐
ing is used or a short-circuit between these signals can be excluded, e.g., by means
of protected cable laying.
C
The specified signals may be installed in the same cable.
–
Not applicable
Short-circuit to 24 V supply voltage
If a short-circuit to High (to 24 V DC) occurs at a physical input, the evaluated signal
may produce a pulse if the signal for
Override
is reset as a result of short-circuit
detection.
WARNING
Undesired override following short-circuit to high
The dangerous state may not be stopped or not be stopped in a timely manner in the
event of non-compliance.
b
Make sure that the transitions of the signals that expect an input pulse ( input
for the muting function blocks) meet the requirements of safety standards and
regulations.
b
Make sure the signal line is laid with protection (to prevent a cross-circuit with
other signal lines)
b
No short-circuit detection, i.e., no referencing to test outputs
4
PROJECT PLANNING
26
O P E R A T I N G I N S T R U C T I O N S | Flexi Compact
8024589/2020-11-10 | SICK
Subject to change without notice
