4
Distance between switching points: Tolerance around the background (twice the config‐
ured tolerance value)
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
Static 0
Deactivated
High
Logical 1
3.7.6
Safety-related normalized measurement function (increasing behavior)
The analog current output provides a continuous output of current values representing
a measured value within a defined distance range. The scaling can be configured in
the range from 4 mA to 20 mA. In contrast to the decreasing behavior, the increasing
behavior can be used in a safety-related manner.
Distance
Output current
in mA
20.5
20.0
4.0
3.5
1
2
Figure 10: Safety-related normalized measurement function (increasing behavior)
1
Reference point 4 mA
2
Reference point 20 mA
The signal to initiate or maintain the safety-related state is a level of
≤
3.5 mA. The
prerequisite for this is the setting of the “Clamp” behavior when no measurement is
possible. The “Hold” setting is not recommended for safety-related use as there is no
immediate detection of an error condition.
Status
Analog current output
Operational status
Measured values in the range between 4 mA
and 20 mA
Error condition
≤ 3.5 mA as well as ≥ 20.5 mA depending on
the error case
Safety-related state
≤ 3.5 mA
3.7.7
Safety-related measurement function
The current distance value is continuously output in the process data via the IO-Link
data interface (resolution 1 mm). The measured value is provided via IO-Link as a
14-bit number. The signal to initiate or maintain the safety-related state is represented
by the value of 0 in the 14-bit process data field. The prerequisite for this is the setting
PRODUCT DESCRIPTION
3
8027663//2022-08-04 | SICK
O P E R A T I N G I N S T R U C T I O N S | DT35S
19
Subject to change without notice