Yes, either a volt-free contact or a semiconductor output is needed for control. It's important that the feedback loop is incorporated.
Relays
Safety relays PNOZsigma
Can the contact expansion modules for the safety relay PNOZsigma also be connected to other safety relays?
Contact
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140 00 Praha 4
Czech Republic
Telephone: +420 222 135353
E-Mail: info@pilz.cz
Technical Support (office hours)
Telephone: +420 222 135354
E-Mail: Support@pilz.cz