SICK DT35S User Manual

3.7 Safety-related functions
The device is intended for use in personal protective equipment for detecting safety-
related objects in mobile and stationary applications.
To this end, it comes with a variety of safety-related functions.
The device has three interfaces for this purpose via which safety-related states and
measured values can be displayed, depending on the selected safety-related function:
•
Digital outputs
•
Analog current output
•
IO-Link
Compared to safety-related measured values, safety-related states are signals at inter‐
faces that prompt the downstream processing units to respond in a safety-related
manner by initiating or maintaining the safe state in the system.
The device meets the requirements of performance level b (PL b), Category B,
according to ENISO13849-1:2015 and performance class B (according to
IEC TS 62998-1:2019). It can be used within its area of application for risk reduction
according to its features.
3.7.1 Distance to object – Safety-related Zone near
This function detects objects below a defined distance threshold (see 3) during dis‐
tance determination. The signal level LOW indicates the requesting of the safety-related
function, i.e., the active state has been reached. An additional configurable hysteresis
of the switching point (see 4) provides the necessary tolerance in the switching range
to prevent premature switching back to the inactive state.
Min. 1 Max. 2
3
1
0
4
Figure 5: Distance to object, Safety-related Zone near
1
Minimum distance
2
Maximum distance
3
Switching point: Limit of safety-related zone
4
Hysteresis of the switching point
The safety-related information of this function (request of function yes/no) can be
provided via the digital outputs (signal level Low/High) as well as in the process data via
the IO-Link interface.
Status Digital output Status bit (bit0 or bit1) in the
IO-Link process data
Active (safety-related) Low Logical0
Deactivated High Logical1
3.7.2 Distance to object – Safety-related Zone far
This function detects objects above a defined distance threshold (see 3) during dis‐
tance determination. The signal level LOW indicates the requesting of the safety-related
function, i.e., the active state has been reached. An additional configurable hysteresis
of the switching point (see 4) provides the necessary tolerance in the switching range
to prevent premature switching back to the inactive state.
3 PRODUCT DESCRIPTION
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O P E R A T I N G I N S T R U C T I O N S | DT35S 8027663//2022-08-04 | SICK
Subject to change without notice

SICK DT35S Specifications

General

Brand	SICK
Model	DT35S
Category	Safety Equipment
Language	English