Siemens Sirius 3TK28 Safety Controller Run test - YouTube
Siemens 3TK28 25-1BB40 Safety Relay, For Emergency Stop and Protective Doors, Autostart/monitored Start, Screw Terminals, 45mm Width, 3 NO Enabling Contacts, 2 NC Signal Contacts 45mm Width, 3 NO Enabling Contacts, 2
Siemens 3TK28 Safety Relay 3TK2802-0DB4 DC 24V | eBay
PLC Hardware - Siemens 3TK2801-0AG2, Surplus in Sealed Packaging
Siemens 3TK28 28-1AL20 Safety Relay, For Emergency Stop and Protective Doors, Auto Start, Screw Terminals, 45mm Width, 2 NO + 2 NO Enabling Contacts, 1 NC Signal Contacts 45mm Width, 2 NO +