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OPERATING INSTRUCTIONS
13
Technical data
13.1
Data sheet
en
30
O P E R A T I N G I N S T R U C T I O N S | WTT12-S
LED/fault pattern
Yellow LEDs flash at the same
time
Table 10: Features
Detectable remission fac‐
tor
Light sender
Laser class
Type of light
Maximum pulse power
Pulse duration
Wavelength
Light spot size within the
sensing range
Dimensions (W x H x D)
Table 11: Safety-related characteristics
Safety-related detection
range
Safety integrity level
Performance class
Performance level
Category
MTTF
D
PFH
(mean probability of a
D
dangerous failure per hour)
DC (diagnostic coverage)
TM (mission time)
Demand rate
Cause
The sensor is not ready for
operation. The sensor will be
in the warming-up phase at
low ambient temperatures.
The sensor will have shut
down at excessively high
ambient temperatures.
WTT12-S
6% ... 90%
Laser
1
Visible red light
< 250 mW
4 ns
658 nm
< 15 mm
20 mm x 49.6 mm x 44.2 mm
WTT12-S
WTT12S-M2569 (Function 1): Object between sensor and refer‐
ence object or reference surface:
Distance front of sensor to reference surface: 150 ... 2,000 mm
Distance front of sensor to object surface: > 50 mm
Distance object surface to reference surface: > 85 mm
WTT12S-C2569 (Function 2): Absence of reference object or refer‐
ence area:
Distance sensor to reference surface: 150 ... 2,000 mm
Distance reference surface to step or opening: > 85 mm
SIL 1 (1 (IEC 61508)
1)
C (IEC TS 62998-1)
1)
PL c (ISO 13849-1)
1)
Category 2 (ISO 13849-1)
1)
138 years (ISO 13849-1)
3.3 × 10
–7
1)
60%
1)
20 years (ISO 13849-1)
Utilization rate: 60%
≤ 36 / h
Measures
At low ambient temperatures,
wait until the sensor has
warmed up. Ensure the sensor
cools down at excessively high
ambient temperatures.
8029123/2024/01/15 | SICK
Subject to change without notice
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