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. 155-822
Fabrikantnummer750105
FabrikantPilz
€ 283,40
Each
Aantal stuks
24 V dc 2 - Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock - - - 2 PNOZsigma Automatic, Manual, Monitored - Screw - -
RS-stocknr. 156-099
Fabrikantnummer750102
FabrikantPilz
€ 144,30
Each
Aantal stuks
24 V dc 1 1 Emergency Stop, Safety Switch/Interlock - - - 3 PNOZsigma Automatic, Manual, Monitored - Screw - -
RS-stocknr. 918-6645
Fabrikantnummer777313
FabrikantPilz
€ 232,97
Each
Aantal stuks
24 240 V ac/dc 2 1 Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock - - - 3 PNOZ X Automatic, Manual - Screw - -
RS-stocknr. 784-5881
Fabrikantnummer3SK1230-1AW20
FabrikantSiemens
€ 97,52
Each
Aantal stuks
110 → 240 V ac/dc - - - - - - - SIRIUS Automatic - Screw - -
RS-stocknr. 701-9212
FabrikantnummerUE10-2FG2D0
FabrikantSick
€ 71,30
Each
Aantal stuks
24 V dc 1, 2 - Light Beam/Curtain - - - 3 - - - Screw - -
RS-stocknr. 751-1033
Fabrikantnummer440R-S12R2
€ 153,00
Each
Aantal stuks
24 V dc 2 1 Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock 4 3 E 2 - Automatic, Manual, Monitored - Screw - Yes
RS-stocknr. 324-7268
Fabrikantnummer774056
FabrikantPilz
€ 120,40
Each
Aantal stuks
230 V ac 1 - Safety Switch/Interlock - - - 2 PNOZ X - - Screw - -
RS-stocknr. 609-7167
FabrikantnummerXPSAFL5130
€ 174,69
Each
Aantal stuks
24 V ac/dc 1, 2 - Light Beam/Curtain - - - 3 Preventa - - Screw - -
RS-stocknr. 327-7613
FabrikantnummerBH5928.92 DC24V 1-10S
FabrikantDold
€ 375,19
Each
Aantal stuks
24 V ac/dc 1, 2 - Emergency Stop - - - 3 Safemaster - - - - -
RS-stocknr. 741-8650
FabrikantnummerSRB 301MC-24V
FabrikantSchmersal
€ 187,68
Each
Aantal stuks
24 V ac/dc 1, 2 - Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock - - - - PROTECT - - Screw - -
RS-stocknr. 918-6649
Fabrikantnummer777512
FabrikantPilz
€ 339,46
Each
Aantal stuks
24 V dc 2 2 Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock - - - 3 PNOZ X Automatic, Manual - Screw - -
RS-stocknr. 447-4540
FabrikantnummerXPSDME1132
€ 291,78
Each
Aantal stuks
24 V dc 1, 2 2 Safety Switch/Interlock - - - 2 Preventa - - Screw - -
RS-stocknr. 812-8957
FabrikantnummerESR5-NO-21-24VAC-DC
FabrikantEaton
€ 191,27
Each
Aantal stuks
- 2 - Emergency Stop, Safety Switch/Interlock - - - 2 - Automatic, Manual - Screw - -
RS-stocknr. 324-7280
Fabrikantnummer774325
FabrikantPilz
€ 151,40
Each
Aantal stuks
24 V ac/dc 1, 2 - Safety Switch/Interlock - - - 2 PNOZ X - - Screw - -
RS-stocknr. 489-6394
Fabrikantnummer777949
FabrikantPilz
€ 430,00
Each
Aantal stuks
24 → 240 V ac/dc 1, 2 1 Speed/Standstill Monitoring - - - 2 PNOZ X - - Screw - -
RS-stocknr. 447-5587
Fabrikantnummer440R-N23117
€ 110,00
Each
Aantal stuks
24 V ac/dc 1 - Light Beam/Curtain, Safety Switch/Interlock - - - 2 Minotaur Automatic, Manual - - - -
RS-stocknr. 422-5180
FabrikantnummerXPSAK371144
€ 209,97
Each
Aantal stuks
230 V ac 2 1 Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock - - - 3 Preventa Automatic, Manual - Screw - -
RS-stocknr. 477-3847
FabrikantnummerXPSAV11113
€ 410,13
Each
Aantal stuks
24 V 1, 2 - Emergency Stop - - - 3 Preventa - - - - -
RS-stocknr. 156-112
Fabrikantnummer750134
FabrikantPilz
€ 205,60
Each
Aantal stuks
48 → 240 V ac/dc 2 1 Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock - - - 3 PNOZsigma Automatic, Manual, Monitored - Screw - -
RS-stocknr. 155-939
Fabrikantnummer750101
FabrikantPilz
€ 122,30
Each
Aantal stuks
24 V dc 1 - Emergency Stop, Safety Switch/Interlock - - - 2 PNOZsigma Automatic, Manual - Screw - -
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