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. 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. 741-8641
FabrikantnummerSRB301AN 24VAC/DC
FabrikantSchmersal
€ 277,46
Each
Aantal stuks
24 V ac/dc 1, 2 - Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock - - - 4 PROTECT - - - - -
RS-stocknr. 741-8666
FabrikantnummerSRB324ST 24V (V.3)
FabrikantSchmersal
€ 317,15
Each
Aantal stuks
24 V ac/dc 1, 2 - Light Beam/Curtain, Safety Switch/Interlock - - - - PROTECT - - Screw - -
RS-stocknr. 741-8635
FabrikantnummerSRB201ZH-24VDC
FabrikantSchmersal
€ 298,11
Each
Aantal stuks
24 V dc 2 2 Safety Switch/Interlock - - - 3 PROTECT - - - - -
RS-stocknr. 741-8653
FabrikantnummerSRB301ST-24V-(V.2)
FabrikantSchmersal
€ 291,76
Each
Aantal stuks
24 V ac/dc 1, 2 - Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock - - - - PROTECT - - Screw - -
RS-stocknr. 698-8707
FabrikantnummerSRB200EXI-1R
FabrikantSchmersal
€ 483,94
Each
Aantal stuks
24 V dc 2 - Safety Switch/Interlock - - - 2 PROTECT Monitored - Screw - -
RS-stocknr. 741-8669
FabrikantnummerSRB202CA/QT 24VDC
FabrikantSchmersal
€ 335,78
Each
Aantal stuks
24 V dc 2 - Safety Switch/Interlock - - - - PROTECT - - Screw - -
RS-stocknr. 146-5868
FabrikantnummerSRB-E-301ST
FabrikantSchmersal
€ 245,35
Each
Aantal stuks
24 V ac/dc 1, 2 1 - - - - - - Automatic - Plug In, Screw - -
RS-stocknr. 146-5864
FabrikantnummerSRB-E-201ST
FabrikantSchmersal
€ 272,91
Each
Aantal stuks
24 V dc 1, 2 - - - - - - - Automatic - Plug In, Screw - -
RS-stocknr. 146-5863
FabrikantnummerSRB-E-201LC
FabrikantSchmersal
€ 158,51
Each
Aantal stuks
24 V dc 1, 2 - - - - - - - Automatic - Plug In, Screw - -
RS-stocknr. 698-8704
FabrikantnummerSRB101EXI-1A
FabrikantSchmersal
€ 633,50
Each
Aantal stuks
24 V dc 2 1 Safety Switch/Interlock - - - 1 PROTECT Automatic, Manual - Screw - -
RS-stocknr. 146-5869
FabrikantnummerSRB-E-322ST
FabrikantSchmersal
€ 365,25
Each
Aantal stuks
24 V dc 1, 2 1 - - - - - - Automatic - Plug In, Screw - -
RS-stocknr. 146-5867
FabrikantnummerSRB-E-212ST
FabrikantSchmersal
€ 296,45
Each
Aantal stuks
24 V dc 1, 2 - - - - - - - Automatic - Plug In, Screw - -
RS-stocknr. 698-8694
FabrikantnummerSRB101EXI-1R
FabrikantSchmersal
€ 587,93
Each
Aantal stuks
24 V dc 2 1 Safety Switch/Interlock - - - 1 PROTECT Monitored - Screw - -
RS-stocknr. 741-8647
FabrikantnummerSRB207AN 24V
FabrikantSchmersal
€ 311,71
Each
Aantal stuks
24 V dc - - Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock - - - - PROTECT - - Screw - -
RS-stocknr. 741-8657
FabrikantnummerSRB302X3-24VAC/DC-230VAC
FabrikantSchmersal
€ 199,43
Each
Aantal stuks
24 V ac/dc, 230 V ac 2 - Light Beam/Curtain, Safety Switch/Interlock - - - - PROTECT - - Screw - -
RS-stocknr. 146-5870
FabrikantnummerSRB-E-402ST
FabrikantSchmersal
€ 337,68
Each
Aantal stuks
24 V dc 1, 2 1 - - - - - - Automatic - Plug In, Screw - -
RS-stocknr. 146-5866
FabrikantnummerSRB-E-204ST
FabrikantSchmersal
€ 272,91
Each
Aantal stuks
24 V dc 1, 2 - - - - - - - Automatic - Plug In, Screw - -
RS-stocknr. 146-5865
FabrikantnummerSRB-E-204PE
FabrikantSchmersal
€ 146,10
Each
Aantal stuks
24 V dc 1, 2 - - - - - - - Automatic - Plug In, Screw - -