Chapter 3 Operating instructions
Flexi Classic
26 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 8011509/YPP0/2015-10-26
Subject to change without notice
Product description
3.3.3 Outputs
You have two possibilities to reach SIL3 or Category 4 for your application:
• dual-channel wiring of the outputs, e.g. Q1/Q2 to K1/K2
or
• single-channel wiring only with routing within protected areas such as in a control
cabinet, e.g. Q1 to K1/K2.
Safety-oriented devices must be suitable for safety related signals!
A function interruption of safety outputs results in a loss of the safety functions so that the
risk of serious injury exists.
• Do not connect any loads that exceed the rated values of the safety outputs.
• Wire the Flexi Classic system so that 24 V DC signals cannot contact the safety outputs.
• Connect the GND wires of the power supply to earth so that the devices do not switch
on when the safety output line is applied to frame potential.
• Use suitable components or devices that fulfil all the applicable regulations and
standards.
Actuators at the outputs can be wired single-channeled. In order to maintain the respective
Safety Integrity Level the lines have to be routed in such a manner that cross circuits to
other live signals can be excluded, for example by routing them within protected areas
such as in a control cabinet or in separate plastic-sheathed cables.
WARNING
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