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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Beskrivning Pris 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-artikelnummer 893-7705
Tillv. art.nr2700570
VarumärkePhoenix Contact
1 184,50 kr
Each
Enheter
24 V dc 2 3 Emergency Stop, Safety Switch/Interlock - - - 3 PSRmini Automatic, Manual 4 Cage Clamp cUL, cULus, EAC, Functional Safety, UL -
RS-artikelnummer 893-7708
Tillv. art.nr2700548
VarumärkePhoenix Contact
1 184,50 kr
Each
Enheter
24 V dc 2 3 Emergency Stop, Safety Switch/Interlock - - - 3 PSRmini Automatic, Manual - Cage Clamp cUL, cULus, EAC, Functional Safety, UL -
RS-artikelnummer 193-0520
Tillv. art.nr440R-B23020
2 421,23 kr
Each
Enheter
24 V ac/dc 1 1 Safety Switch/Interlock - - - 3 Minotaur Automatic, Manual, Monitored - Screw - -
RS-artikelnummer 327-7613
Tillv. art.nrBH5928.92 DC24V 1-10S
VarumärkeDold
3 995,82 kr
Each
Enheter
24 V ac/dc 1, 2 - Emergency Stop - - - 3 Safemaster - - - - -
RS-artikelnummer 245-1860
Tillv. art.nr774080
VarumärkePilz
3 850,62 kr
Each
Enheter
24 V ac/dc 2 1 Safety Switch/Interlock - - - 7 - Automatic, Manual, Monitored - Screw - -
RS-artikelnummer 240-8709
Tillv. art.nrBD5935.48 AC50/60Hz 230V
VarumärkeDold
3 396,17 kr
Each
Enheter
230 V ac 2 1 Emergency Stop - - - 3 Safemaster Monitored - Terminal Block - -
RS-artikelnummer 741-8669
Tillv. art.nrSRB202CA/QT 24VDC
VarumärkeSchmersal
4 377,67 kr
Each
Enheter
24 V dc 2 - Safety Switch/Interlock - - - - PROTECT - - Screw - -
RS-artikelnummer 291-3201
Tillv. art.nrBG5924.48 AC/DC24V
VarumärkeDold
2 257,50 kr
Each
Enheter
24 V dc 1 - Emergency Stop - - - 4 Safemaster - - - - -
RS-artikelnummer 893-7711
Tillv. art.nr2904950
VarumärkePhoenix Contact
894,25 kr
Each
Enheter
24 V dc 1 1 Emergency Stop, Safety Switch/Interlock - - - 1 PSRmini Automatic 1 Screw cUL, cULus, EAC, Functional Safety, UL -
RS-artikelnummer 801-6028
Tillv. art.nr2981457
VarumärkePhoenix Contact
690,43 kr
Each
Enheter
24 V ac/dc 1 - - - - - 6 - - 1 Cage Clamp - -
RS-artikelnummer 362-0174
Tillv. art.nr774350
VarumärkePilz
3 886,44 kr
Each
Enheter
24 V dc 2 1 Two-Hand Control - - - 2 PNOZ X Monitored - Screw - -
RS-artikelnummer 489-6366
Tillv. art.nr777602
VarumärkePilz
2 580,67 kr
Each
Enheter
24 V dc 1, 2 - Safety Switch/Interlock - - - 2 PNOZ X - - Screw - -
RS-artikelnummer 893-7717
Tillv. art.nr2700564
VarumärkePhoenix Contact
1 184,50 kr
Each
Enheter
24 V dc 2 3 Safety Switch/Interlock - - - 3 PSRmini Automatic, Manual - Cage Clamp cUL, cULus, EAC, Functional Safety, UL -
RS-artikelnummer 893-7691
Tillv. art.nr2700498
VarumärkePhoenix Contact
1 152,16 kr
Each
Enheter
24 V dc 2 2 Emergency Stop, Safety Switch/Interlock - - - 2 PSRmini Automatic, Manual 3 Screw cUL, cULus, EAC, Functional Safety, UL -
RS-artikelnummer 733-2418
Tillv. art.nr2TLA010002R0000
VarumärkeABB
2 420,49 kr
Each
Enheter
24 V dc 2 - Two-Hand Control - - - 4 - - - Screw - -
RS-artikelnummer 324-7268
Tillv. art.nr774056
VarumärkePilz
1 334,11 kr
Each
Enheter
230 V ac 1 - Safety Switch/Interlock - - - 2 PNOZ X - - Screw - -
RS-artikelnummer 447-5717
Tillv. art.nr440R-N23135
1 706,77 kr
Each
Enheter
24 V ac/dc 1 1 Light Beam/Curtain, Safety Switch/Interlock - - - 3 Minotaur Monitored - Screw - -
RS-artikelnummer 271-518
Tillv. art.nrUE403-A0930
VarumärkeSick
3 063,74 kr
Each
Enheter
- - - - - - - - - - - - - -
RS-artikelnummer 814-6952
Tillv. art.nrXPSAC3721P
VarumärkeSchneider Electric
2 137,28 kr
Each
Enheter
230 V ac 1 1 Emergency Stop, Safety Switch/Interlock - - - 3 Preventa Monitored - Screw - -
RS-artikelnummer 751-1033
Tillv. art.nr440R-S12R2
1 518,23 kr
Each
Enheter
24 V dc 2 1 Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock 4 3 E 2 - Automatic, Manual, Monitored - Screw - Yes