SICK STR1

11 Technical data
11.1 Technical data
Table 18: Features
Features
Safe switch on distance S
ao
(IE
C 60947 5-3) see "Sensing ranges", page 40
Assured switch-off distance S
ar
(IE
C 60947 5-3)
see "Sensing ranges", page 40
Max. actuation frequency 0.5 Hz
Safe series connection ≤ 30 safety switches
Table 19: Safety-related parameters
Safety-related parameters
Performance level PL e (EN ISO 13849-1)
Category 4 (EN ISO 13849)
Safety integrity level SIL 3 (EN 61508)
SIL claim limit SILCL 3 (EN 62061)
PFHd (mean probability of one dangerous fail‐
ur
e per hour)
5.1 × 10
–9
at 40 °C and sea level
14 x 10
–9
at 40 °C and 2,000 m above sea
level
T
M
(mis
sion time) 20 years (EN ISO 13849–1)
Response time (removal from response range)
1)
≤ 40 ms
Release time (response time when approach‐
in
g response range)
2)
≤ 100 ms
Risk time
3)4)
≤ 100 ms
Length of cable
5)
≤ 200 m
Minimum distance between 2 safety switches Depending on alignment see "Mount
ing",
page 20
Type Type 4 (EN ISO 14119)
Coding level
Universally coded
U
niquely coded
Permanently coded
Low coding level (EN ISO 14119)
Hi
gh coding level (EN ISO 14119)
High coding level (EN ISO 14119)
Safe status when a fault occurs At least one safety-related semiconductor out‐
put (O
SSD) is in the OFF state.
1)
Response time for moving the OSSDs into the OFF state when the actuator is removed from the response
ar
ea or when the OSSD input signals go into the OFF state.
2)
Response time for moving the OSSDs into the ON state when the actuator is detected by the sensor and
the OSSD input signals are in the ON state.
3)
At least one of the two OSSD outputs is safely switched off during the response time.
4)
The risk time is the time needed to detect internal and external faults. External errors affect the OSSDs
(short-circuit to an OSSD and cross-circuit between the two OSSDs). At least one of the two OSSDs is
safely switched off during the risk time.
5)
Length of cable and cable cross-section change the voltage drop depending on the output current (R
max
=
14.5 Ω).
Table 20: Interfaces
Interfaces
System connection
TECHNICAL DATA 11
8018754/12IU/2020-01-30 | SICK O P E R A T I N G I N S T R U C T I O N S | STR1
35
Subject to change without notice