About this document
Leuze electronic
MLC 520S
5
1
About this document
1.1
Used symbols and signal words
Tab. 1.1:
Warning symbols and signal words
Symbol indicating dangers to persons
Symbol indicating possible property damage
NOTE
Signal word for property damage
Indicates dangers that may result in property damage if the measures for dan-
ger avoidance are not followed.
CAUTION
Signal word for minor injuries
Indicates dangers that may result in minor injury if the measures for danger
avoidance are not followed.
WARNING
Signal word for serious injury
Indicates dangers that may result in severe or fatal injury if the measures for
danger avoidance are not followed.
DANGER
Signal word for life-threatening danger
Indicates dangers with which serious or fatal injury is imminent if the measures
for danger avoidance are not followed.
Tab. 1.2:
Other symbols
Symbol for tips
Text passages with this symbol provide you with further information.
Symbol for action steps
Text passages with this symbol instruct you to perform actions.
Symbol for action results
Text passages with this symbol describe the result of the preceding action.
Tab. 1.3:
Terms and abbreviations
Response time
The response time of the protective device is the maximum time between the
occurrence of the event that results in activation of the safety sensor and the
provision of the switching signal at the interface of the protective device (e.g.,
OFF state of the OSSD pair).
AOPD
Active Optoelectronic Protective Device
(
A
ctive
O
ptoelectronic
P
rotective
D
evice)
ESPE
E
lectro-
s
ensitive
p
rotective
e
quipment
EDM
Contactor monitoring
(
E
xternal
D
evice
M
onitoring)
LED
LED, display element in transmitter and receiver
MLC
Brief description of the safety sensor, consisting of transmitter and receiver
MTTF
d
Mean time to dangerous failure
(
M
ean
T
ime
T
o dangerous
F
ailure)
OSSD
Safety-related switching output
(
O
utput
S
ignal
S
witching
D
evice)
