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Table 14: Safety-related characteristic data - safety outputs (Q)
Safety outputs (Q)
Single-channel 1) Dual channel
Without test
pulses
2) 3)
With test pulses Without test
pulses
2) 3)
With test pulses
Safety integrity
level (IEC 61508) SIL 3 SIL 3 SIL 3 SIL 3
SIL claim limit
(IEC 62061) SILCL 3 SILCL 3 SILCL 3 SILCL 3
Category (ISO 13849-1)
With test
pulses on all
safety outputs
of a module Category 4 Category 4
Without test
pulses on one
or more safety
outputs of a
module Category 3 Category 3 Category 4 Category 4
Performance
level (ISO
13849-1) PL e PL e PL e PL e
PFH
D
(h -1 ) 5 × 10 -9 0.5 × 10 -9 5 × 10 -9 0.5 × 10 -9
PFD
avg
30 × 10 -5 4 × 10 -5 30 × 10 -5 4 × 10 -5
MTTF
D
ISO
13849-1
[years]
500 500 500 500
T
M
ISO 13849-1
[years]
20 20 20 20
1) If you are using single-channel safety outputs (Q) for a safety-related application, then a protected or
separate cabling is required for these safety outputs in order to achieve the safety-related characteristics.
Reason: While short-circuits to the supply voltage or cross-circuits to other outputs can be detected, no
other option to switch-off the device exist.
2) If you are using single-channel or dual-channel safety outputs (Q) without test pulses, then a protected or
separate cabling is required for these safety outputs in order to achieve the safety-related characteristics.
Reason: Short-circuits to the supply voltage or cross-circuits to other outputs are not detected in the
switched-on state without test pulses.
This also applies if an output is used for a non-safety related application. Reason: Even if an internal
hardware error is detected, the switch-off capability of the other safety outputs may be impaired by
reverse currents.
3) If you are using single-channel/dual-channel safety outputs (Q) without test pulses for a safety-related
application, then one of the following measures is required in order to achieve the safety-related charac‐
teristics:
• Restart the safety controller once a year.
• Manually switch off all safety outputs simultaneously for min. 2 s once a year. The supply voltage to
the outputs must be within the operating range during this manual test.
General data
Table 15: General data
Climatic conditions
Ambient operating temperature
At altitudes up to 2,000 m
above sea level –25 °C … +55 °C
TECHNICAL DATA
12
8024583/2020-11-10 | SICK O P E R A T I N G I N S T R U C T I O N S | Flexi IO XTDO1 33
Subject to change without notice