APPENDIX
App. - 22
App. 8 STO function with SIL 3 certification
The LECSB2-T
□
series now comply with safety integrity level 3 (SIL 3) of the IEC 61508:2010 functional
safety standard.
(1) Change of the compliance
The target LECSB2-T
□
drivers now comply with SIL 3 (Table app. 3).
Table app. 3 Compliance with SIL 3
EN ISO 13849-1 Category 3 PL e,
IEC 61508 SIL 3,
EN 62061 SIL CL 3,
EN 61800-5-2 STO function
(2) Use with SIL 3
Set the safety level with [Pr. PF18 STO diagnosis error detection time].
To use the driver with SIL 3, set [Pr. PF18 STO diagnosis error detection time] within the range of 1 to 60,
connect the TOFB output (CN8) of the driver to the input of a SIL 3-certified PC or PLC...etc and execute
the diagnosis. SIL 3 functional safety of the drivers is certified by TÜV SÜD.
(3) Use with SIL 2 (as conventional)
The drivers are still capable of SIL 2 as before regardless of whether the STO diagnosis function is
enabled or not.
Either of the conventionally-used TÜV Rheinland certification or the new TÜV SÜD certification may be
used.
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