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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Omschrijving Prijs 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-stocknr. 245-1848
Fabrikantnummer774310
FabrikantPilz
€ 198,91
Each
Aantal stuks
24 V ac/dc 2 1 Safety Switch/Interlock - - - 3 PNOZ X Automatic, Monitored - Screw - -
RS-stocknr. 245-1854
Fabrikantnummer774318
FabrikantPilz
€ 198,91
Each
Aantal stuks
24 V dc, 230 V ac 2 1 Emergency Stop - - - 3 PNOZ X Automatic, Monitored - Screw - -
RS-stocknr. 447-4477
FabrikantnummerXPSAC5121
€ 164,10
Each
Aantal stuks
24 V ac/dc - 1 Emergency Stop - - - 3 Preventa - - Screw - -
RS-stocknr. 156-106
Fabrikantnummer750104
FabrikantPilz
€ 194,50
Each
Aantal stuks
24 V dc 2 1 Emergency Stop - - - 3 PNOZsigma Automatic, Manual, Monitored - Screw - -
RS-stocknr. 360-4346
FabrikantnummerXPSAF5130
€ 195,10
Each
Aantal stuks
24 V ac/dc 1, 2 - Safety Switch/Interlock - - - 3 Preventa - - Screw - -
RS-stocknr. 156-083
Fabrikantnummer750103
FabrikantPilz
€ 149,90
Each
Aantal stuks
24 V dc 2 - Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock - - - 2 PNOZsigma Automatic, Manual, Monitored - Screw - -
RS-stocknr. 245-1905
Fabrikantnummer774500
FabrikantPilz
€ 296,62
Each
Aantal stuks
24 V dc 2 - Safety Switch/Interlock - - - 2 PNOZ X Automatic, Manual, Monitored - Screw - -
RS-stocknr. 362-0168
Fabrikantnummer774585
FabrikantPilz
€ 126,03
Each
Aantal stuks
24 V dc 1 - Expansion Module - - - 4 PNOZ X Automatic - Screw - -
RS-stocknr. 203-8035
Fabrikantnummer774073
FabrikantPilz
€ 178,90
Each
Aantal stuks
24 V dc, 110 V ac 2 - Safety Switch/Interlock - - - 2 - Automatic, Manual - Screw - -
RS-stocknr. 489-6350
Fabrikantnummer777302
FabrikantPilz
€ 175,57
Each
Aantal stuks
24 → 240 V ac/dc 1, 2 1 Safety Switch/Interlock - - - 3 PNOZ X - - Screw - -
RS-stocknr. 239-1033
Fabrikantnummer774300
FabrikantPilz
€ 147,06
Each
Aantal stuks
24 V ac/dc 1 1 Safety Switch/Interlock - - - 3 PNOZ X Automatic, Manual - Screw - -
RS-stocknr. 245-1955
Fabrikantnummer774150
FabrikantPilz
€ 233,08
Each
Aantal stuks
24 V dc 2 1 Expansion Module - - - 8 PNOZ X - - Screw - -
RS-stocknr. 239-1055
Fabrikantnummer774306
FabrikantPilz
€ 148,21
Each
Aantal stuks
24 V ac/dc 2 - Safety Switch/Interlock - - - 2 PNOZ X Automatic, Manual - Screw - -
RS-stocknr. 784-5780
Fabrikantnummer3SK1111-1AB30
FabrikantSiemens
€ 152,91
Each
Aantal stuks
24 V ac/dc 1 - - - - - 4 SIRIUS Automatic, Monitored - Screw - -
RS-stocknr. 239-1049
Fabrikantnummer774303
FabrikantPilz
€ 148,21
Each
Aantal stuks
24 V ac/dc 2 - Light Beam/Curtain, Safety Switch/Interlock - - - 2 PNOZ X Manual - Screw - -
RS-stocknr. 447-4534
FabrikantnummerXPSDMB1132
€ 233,30
Each
Aantal stuks
24 V dc 1, 2 2 Safety Switch/Interlock - - - 2 Preventa - - Screw - -
RS-stocknr. 240-8743
FabrikantnummerBD5987.02/001 AC50/60Hz 230V
FabrikantDold
€ 290,01
Each
Aantal stuks
230 V ac 2 - Emergency Stop - - - 2 Safemaster - - - - -
RS-stocknr. 422-5152
FabrikantnummerXPSAK311144
€ 233,30
Each
Aantal stuks
24 V ac/dc 2 1 Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock - - - 3 Preventa Automatic, Manual - Screw - -
RS-stocknr. 324-7274
Fabrikantnummer774059
FabrikantPilz
€ 123,49
Each
Aantal stuks
24 V ac/dc 1 - Safety Switch/Interlock - - - 2 PNOZ X - - Screw - -
RS-stocknr. 245-1860
Fabrikantnummer774080
FabrikantPilz
€ 340,70
Each
Aantal stuks
24 V ac/dc 2 1 Safety Switch/Interlock - - - 7 - Automatic, Manual, Monitored - Screw - -
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