About this document
Leuze electronic GmbH + Co. KG RSL 420 8
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
CS Switching signal from a control
(Controller Signal)
DTM Software device manager of the safety sensor
(Device Type Manager)
EDM Contactor monitoring
(External Device Monitoring)
FDT Software frame for management of device managers (DTM)
(Field Device Tool)
Field pair A protective field with an associated warning field
AGV Automated Guided Vehicle
LED LED, display element in the safety sensor
(Light Emitting Diode)
OSSD Safety-related switching output
(Output Signal Switching Device)
PFH
d
Probability of a dangerous failure per hour
(Probability of dangerous Failure per Hour)
PL Performance Level
Quad Two field pairs (four fields) that are monitored simultaneously in four field mode
TSS Transverse Side-tracking Skate
RES Start/restart interlock
(Start/REStart interlock)
SIL Safety Integrity Level
State ON: device intact, OSSDs switched on
OFF: device intact, OSSDs switched off
Locking: device, connection or actuation/operation faulty, OSSDs switched off
(lock-out)
1.4 Checklists
The checklists serve as a reference for the machine manufacturer or supplier (see chapter 11 "Testing").
They replace neither testing of the complete machine or system prior to the initial start-up nor their periodic
testing by a competent person. The checklists contain minimum testing requirements. Depending on the
application, other tests may be necessary.
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