![background image](http://html1.mh-extra.com/html/sick/flexlock/flexlock_operating-instructions-manual_1264596016.webp)
6
34
50
Figure 7: Maximum wall thickness of the mounting surface (without spacers)
Further topics
•
"Safety switch dimensional drawings", page 42
4.4
Integration in the electrical control system
You need to take the following into consideration when integrating the safety locking
device into the electrical control system.
Requirement for use
•
The safety locking device must not be bypassed by electrical means, e.g. by
bridging the contacts. You may need to take measures to prevent this.
•
The connected controller and all devices responsible for safety must comply with
the required performance level and the required category (for example according
to ISO 13849-1).
•
The overall concept of the control system in which the device is integrated must be
validated in accordance with ISO 13849-2.
•
The inputs of a connected evaluation unit must be positive-switching (PNP) inputs
because the two outputs of the safety switch supply a level of the supply voltage in
the switched-ON state.
Generating the signals for the safety locking device
•
For variants for protecting people only: The locking function may only be unlocked
when the dangerous state has ended. Depending on the safety concept, the signal
is analyzed, for example, by a safety relay or a safety controller.
•
Use control without test pulses. The safety switch generates its own test pulses.
Evaluating the signals from the safety locking device
•
In the closed or locked state, the OSSDs signal the ON state with the signal level
HIGH (non-isolated). When opened or unlocked or there is a device fault, the
OSSDs signal the OFF state with the signal level LOW.
•
Downstream control elements must evaluate the output signals of the safety
switch in such a way that the dangerous state of the machine is safely ended. The
machine switches to the safe state if, at any time, at least one OSSD in the OSSD
pair switches to the OFF state.
•
Switch-on commands that put the machine in a dangerous state may only be
activated when the OSSDs of the safety locking device are in the ON state.
4
PROJECT PLANNING
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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 | flexLock
8020562/2022-07-07 | SICK
Subject to change without notice