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 447-5717
Tillv. art.nr440R-N23135
1 706,77 kr
Each
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24 V ac/dc 1 1 Light Beam/Curtain, Safety Switch/Interlock - - - 3 Minotaur Monitored - Screw - -
RS-artikelnummer 291-3201
Tillv. art.nrBG5924.48 AC/DC24V
VarumärkeDold
2 257,50 kr
Each
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24 V dc 1 - Emergency Stop - - - 4 Safemaster - - - - -
RS-artikelnummer 893-7691
Tillv. art.nr2700498
VarumärkePhoenix Contact
1 152,16 kr
Each
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24 V dc 2 2 Emergency Stop, Safety Switch/Interlock - - - 2 PSRmini Automatic, Manual 3 Screw cUL, cULus, EAC, Functional Safety, UL -
RS-artikelnummer 609-7167
Tillv. art.nrXPSAFL5130
VarumärkeSchneider Electric
2 016,30 kr
Each
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24 V ac/dc 1, 2 - Light Beam/Curtain - - - 3 Preventa - - Screw - -
RS-artikelnummer 712-5263
Tillv. art.nr2986575
VarumärkePhoenix Contact
976,93 kr
Each
Enheter
24 V dc - - - - - - 3 - - - Screw - -
RS-artikelnummer 656-6067
Tillv. art.nrRK5942.02 DC24V
VarumärkeDold
1 270,95 kr
Each
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24 V dc 1 - Emergency Stop - - - 1 Safemaster - - Screw - -
RS-artikelnummer 193-0520
Tillv. art.nr440R-B23020
2 421,23 kr
Each
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24 V ac/dc 1 1 Safety Switch/Interlock - - - 3 Minotaur Automatic, Manual, Monitored - Screw - -
RS-artikelnummer 801-5943
Tillv. art.nr2981062
VarumärkePhoenix Contact
1 709,64 kr
Each
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24 V ac/dc 2 - Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock - - - 4 - Automatic, Manual 3 Cage Clamp - -
RS-artikelnummer 190-2124
Tillv. art.nr440R-DG2R2T
3 992,27 kr
Each
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26.4 V 2 - Safety Relay - - - 2 - Automatic, Monitored Manual CAT III Screw - -
RS-artikelnummer 191-9872
Tillv. art.nr751185
VarumärkePilz
3 561,00 kr
Each
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24 V dc 2 - - - - - 2 PNOZ s5 Automatic, Manual 4 Cage Clamp - -
RS-artikelnummer 191-9873
Tillv. art.nr751187
VarumärkePilz
1 871,78 kr
Each
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24 V dc 2 1 Safety Switch - - - 4 PNOZ s7 Automatic 4 Cage Clamp - -
RS-artikelnummer 123-2746
Tillv. art.nr280006
VarumärkeIDEM
3 720,04 kr
Each
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24 V ac/dc 2 3 Emergency Stop, Safety Switch/Interlock - - - 7 Viper Automatic, Manual - Screw cULus, EN 60204-1, EN 62061, EN ISO 12100, EN ISO 13849-1, EN ISO 13849-2, TUV, UL 508 -
RS-artikelnummer 707-9983
Tillv. art.nrXPSVNE3442P
VarumärkeSchneider Electric
5 282,71 kr
Each
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115 V 2 2 Speed/Standstill Monitoring - - - 2 Preventa - - Screw - -
RS-artikelnummer 327-7635
Tillv. art.nrBH5932.22 DC24V 15IPM
VarumärkeDold
3 096,36 kr
Each
Enheter
24 V dc 2 - Speed/Standstill Monitoring - - - 3 Safemaster - - - - -
RS-artikelnummer 177-4033
Tillv. art.nr2702192
VarumärkePhoenix Contact
1 286,28 kr
Each
Enheter
24 V dc 1 - - - - - 1 - Manual 1 Terminal Block - -
RS-artikelnummer 481-8237
Tillv. art.nrXPSAK351144
VarumärkeSchneider Electric
2 822,82 kr
Each
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120 V ac 2 1 Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock - - - 3 Preventa Automatic, Manual - Screw - -
RS-artikelnummer 893-7727
Tillv. art.nr2904953
VarumärkePhoenix Contact
926,69 kr
Each
Enheter
24 V dc 2 1 Emergency Stop, Safety Switch/Interlock - - - 1 PSRmini Manual 3 Screw cUL, cULus, EAC, Functional Safety, UL -
RS-artikelnummer 666-7038
Tillv. art.nr2963912
VarumärkePhoenix Contact
3 245,49 kr
Each
Enheter
24 V ac/dc 1, 2 1 Emergency Stop, Safety Switch/Interlock - - - 8 - - 3 Screw - -
RS-artikelnummer 784-5825
Tillv. art.nr3SK1121-2CB44
VarumärkeSiemens
4 125,66 kr
Each
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24 V dc 1 - - - - - 4 SIRIUS Automatic, Monitored - Cage Clamp - -
RS-artikelnummer 191-9874
Tillv. art.nr751189
VarumärkePilz
2 352,95 kr
Each
Enheter
24 V dc 2 1 Safety Switch - - - 3 PNOZ s9 Manual 4 Cage Clamp - -