![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 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](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/71gLXDF8rrL.jpg)
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
3TK2827-1BB40 | Siemens 3TK28 Series Single-Channel Speed/Standstill Monitoring Safety Relay, 24V dc, 2 Safety Contact(s) | RS
![Siemens - 3TK28281BB40 - Sirius 3TK28 Safety Relay, Single Channel, 24 V dc, 2 Safety, 1 Auxiliary - RS Siemens - 3TK28281BB40 - Sirius 3TK28 Safety Relay, Single Channel, 24 V dc, 2 Safety, 1 Auxiliary - RS](https://assets.rs-online.com/f_auto,q_auto/70384406.jpg)
Siemens - 3TK28281BB40 - Sirius 3TK28 Safety Relay, Single Channel, 24 V dc, 2 Safety, 1 Auxiliary - RS
3TK2825-1BB40 | Siemens 3TK28 Series Dual-Channel Safety Switch/Interlock Safety Relay, 24V dc, 3 Safety Contact(s) | RS
3TK2825-1AL20 | Siemens Dual-Channel Safety Switch/Interlock Safety Relay, 230V ac, 3 Safety Contacts | RS
3TK2828-1AB21 | Siemens 3TK28 Series Single/Dual-Channel Speed/Standstill Monitoring Safety Relay, 24V ac, 4 Safety Contact(s) | RS
3TK2827-1BB40 | Siemens 3TK28 Series Single-Channel Speed/Standstill Monitoring Safety Relay, 24V dc, 2 Safety Contact(s) | RS
![Siemens 3TK28 30-1CB30 Safety Relay Expansion Unit, Screw Terminals, 4 NO Enabling Contacts, 24VAC/VDC Rated Voltage, 22.5mm Width: Electronic Relays: Amazon.com: Industrial & Scientific Siemens 3TK28 30-1CB30 Safety Relay Expansion Unit, Screw Terminals, 4 NO Enabling Contacts, 24VAC/VDC Rated Voltage, 22.5mm Width: Electronic Relays: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/81V2srWn+XL.jpg)