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 +
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Siemens 3TK28 30-2CB30 Safety Relay Expansion Unit, Spring Loaded Terminals, 4 NO Enabling Contacts, 24VAC/VDC Rated Voltage, 22.5mm Width: Electronic Relays: Amazon.com: Industrial & Scientific
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Siemens 3TK28 34-2AB20 Safety Relay Press Control Unit, Two Hand Control Unit, Spring Loaded Terminals, 2 NO Enabling Contacts, 24VAC Rated Voltage, 45mm Width: Electronic Relays: Amazon.com: Industrial & Scientific
3TK2834-1BB40 by SIEMENS - Buy or Repair at Radwell - Radwell.com