Siemens SIMATIC HMI 177 Mode D'emploi page 15

Connection example 1 – Enabling button with safety circuit device
The following figure shows the connection of a SIRIUS 3TK2841 safety circuit device to the enabling button of the mobile
panel.
All contacts of the safety relay (contactor) KA and KB are fitted with positively-driven contacts in accordance with
EN 50205:2002.
Approval in accordance with EN ISO 13849-1:2008/AC:2009
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A5E02519749-04, 12/2012