Safety Relays

What are they?
A safety relay is a device that monitors for potential errors or faults in machinery or plants and works to prevent injury and reduce risk. When an error occurs, the safety relay initiates a response to bring the risk back to a safe, acceptable level. Safety relays protect both machinery and employees, preventing potential expensive maintenance and equipment replacement.
Example functions include initiating a controlled pause in machinery or equipment to safely stop movement. They can also be used as an emergency stop mechanism, switching off the power to particular machinery or plants.
Single function or multi-function?
Safety relays can be single function or multi-function. Single function relays monitor a specific type of activity while multi-function safety relays can monitor different functions. Multi-function safety relays can be used in place of several single function, individual units.
The benefits of using multi-function relays include simpler installation and less wiring. As fewer individual units are needed, using multi-function relays can also free up panel space. Multi-function safety relays give you greater flexibility to make changes within the design or panel.
Where would you find a safety relay?
Safety relays are often found in the following control devices:
- Two hand controls
- Movable guards
- Light curtains, light barriers and light grids
- Magnetic switches
- Safety mats and pressure sensitive mats
- Three position devices
- Non-contact safety sensors
- Safety switches
- Emergency stop buttons
Who uses them?
Anyone can integrate a safety relay within a circuit to create a safety circuit without any specific training.

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Description Price Supply Voltage Number of Channels Auxiliary Contacts Function Safety Category ISO 13849-1 SIL IEC 61508 PL ISO 13849-1 Safety Contacts Range Reset Method Safety Category Terminal Type Standards Met Configurable
RS Stock No. 733-2391
Mfr. Part No.2TLA010029R0000
BrandABB
kr 1 429,40
Each
Units
24 V dc 1, 2 - Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock - - - 2 - - - Terminal Block - -
RS Stock No. 666-7038
Mfr. Part No.2963912
kr 2 875,39
Each
Units
24 V ac/dc 1, 2 1 Emergency Stop, Safety Switch/Interlock - - - 8 - - 3 Screw - -
RS Stock No. 712-5248
Mfr. Part No.2900525
kr 1 394,00
Each
Units
24 V ac/dc 2 1 Safety Switch/Interlock - - - 2 - - 3 Screw - -
RS Stock No. 360-4352
Mfr. Part No.XPSAF5130P
kr 1 370,57
Each
Units
24 V ac/dc 1, 2 - Safety Switch/Interlock - - - 3 Preventa - - Screw - -
RS Stock No. 245-1848
Mfr. Part No.774310
BrandPilz
kr 2 011,15
Each
Units
24 V ac/dc 2 1 Safety Switch/Interlock - - - 3 PNOZ X Automatic, Monitored - Screw - -
RS Stock No. 447-4477
Mfr. Part No.XPSAC5121
kr 1 055,45
Each
Units
24 V ac/dc - 1 Emergency Stop - - - 3 Preventa - - Screw - -
RS Stock No. 741-8653
Mfr. Part No.SRB301ST-24V-(V.2)
BrandSchmersal
kr 2 698,87
Each
Units
24 V ac/dc 1, 2 - Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock - - - - PROTECT - - Screw - -
RS Stock No. 814-6927
Mfr. Part No.XPSAC5121P
kr 2 181,28
Each
Units
24 V ac/dc 1 1 Emergency Stop, Safety Switch/Interlock - - - 3 Preventa Monitored - Screw - -
RS Stock No. 666-7044
Mfr. Part No.2963802
kr 1 273,33
Each
Units
24 V ac/dc 1 1 Emergency Stop, Safety Switch/Interlock - - - 4 - - 1 Screw - -
RS Stock No. 836-2738
Mfr. Part No.G7SA5A1B24DC
BrandOmron
kr 319,20
Each
Units
24 V dc - - - - - - - - - - - - -
RS Stock No. 733-2341
Mfr. Part No.2TLA010026R0000
BrandABB
kr 1 962,40
Each
Units
24 V dc 1, 2 - Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock - - - 4 - - - Terminal Block - -
RS Stock No. 757-9304
Mfr. Part No.G9SB-3012-A AC/DC24
BrandOmron
kr 2 279,00
Each
Units
24 V ac/dc 2 1 Emergency Stop - - - 3 - - - - - -
RS Stock No. 757-9310
Mfr. Part No.G9SA-321-T075 AC/DC24
BrandOmron
kr 4 179,00
Each
Units
24 V ac/dc 2 1 Emergency Stop - - - 3 - - - - - -
RS Stock No. 360-4346
Mfr. Part No.XPSAF5130
kr 1 252,40
Each
Units
24 V ac/dc 1, 2 - Safety Switch/Interlock - - - 3 Preventa - - Screw - -
RS Stock No. 240-8670
Mfr. Part No.BN5983.53 DC24V
BrandDold
kr 3 734,14
Each
Units
24 V dc 2 1 Emergency Stop - - - 3 Safemaster Monitored - Terminal Block - -
RS Stock No. 156-106
Mfr. Part No.750104
BrandPilz
kr 1 977,80
Each
Units
24 V dc 2 1 Emergency Stop - - - 3 PNOZsigma Automatic, Manual, Monitored - Screw - -
RS Stock No. 814-6952
Mfr. Part No.XPSAC3721P
kr 2 144,83
Each
Units
230 V ac 1 1 Emergency Stop, Safety Switch/Interlock - - - 3 Preventa Monitored - Screw - -
RS Stock No. 801-6028
Mfr. Part No.2981457
kr 611,70
Each
Units
24 V ac/dc 1 - - - - - 6 - - 1 Cage Clamp - -
RS Stock No. 245-1854
Mfr. Part No.774318
BrandPilz
kr 2 011,15
Each
Units
24 V dc, 230 V ac 2 1 Emergency Stop - - - 3 PNOZ X Automatic, Monitored - Screw - -
RS Stock No. 549-609
Mfr. Part No.G9SA-301 24AC/DC
BrandOmron
kr 3 132,00
Each
Units
24 V ac/dc 1, 2 1 Emergency Stop - - - 3 - - - - - -
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