3SK1 safety relay contact multiplication

Hi,

I have safety relay (3SK1121-1AB40). in this safety relay,  is it mandatory to use only direct contact of the relay or we can multiply it with auxiliary contactor to use these contacts in control logic?

Is there any effect in safety of the motor after doing this (multiply it with auxiliary contactor)?

Kindly suggest.

Hi,

You will find information in the manual on page 41

=>Manual SIRIUS 3SK1 Safety Relays

https://support.industry.siemens.com/cs/de/de/view/67585885/en

Additional information:

The SIRIUS 3SK1 safety relays offer such an option with their basic unit and input expansion modules. This means you can expand the number or connectable sensors for each F-input terminal of the fail-safe controller. This FAQ shows the different options for using the 3SK1 device series as input expansion modules.

This information is too online available:
http://support.automation.siemens.com/WW/view/en/81353885

kinjalpatel1899

Hi,

I have safety relay (3SK1121-1AB40). in this safety relay,  is it mandatory to use only direct contact of the relay or we can multiply it with auxiliary contactor to use these contacts in control logic?

Is there any effect in safety of the motor after doing this (multiply it with auxiliary contactor)?

Kindly suggest.

Using auxiliary contactor to multiply the contacts defet the application of use of safety relay.