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. 784-5780
Fabrikantnummer3SK1111-1AB30
FabrikantSiemens
153,95 €
Each
Aantal stuks
24 V ac/dc 1 - - - - - 4 SIRIUS Automatic, Monitored - Screw - -
RS-stocknr. 784-5790
Fabrikantnummer3SK1112-1BB40
FabrikantSiemens
122,67 €
Each
Aantal stuks
24 V dc 1 - - - - - - SIRIUS Automatic, Monitored - Screw - -
RS-stocknr. 784-5881
Fabrikantnummer3SK1230-1AW20
FabrikantSiemens
97,52 €
Each
Aantal stuks
110 to 240 V ac/dc - - - - - - - SIRIUS Automatic - Screw - -
RS-stocknr. 498-937
Fabrikantnummer3RK1205-0BG00-0AA2
FabrikantSiemens
142,20 €
Each
Aantal stuks
26.5 → 31.5 V dc - - - - - - 2 SIRIUS - - Cage Clamp - -
RS-stocknr. 784-5800
Fabrikantnummer3SK1121-1AB40
FabrikantSiemens
195,65 €
Each
Aantal stuks
24 V dc 1 - - - - - 4 SIRIUS Automatic, Monitored - Screw - -
RS-stocknr. 784-5822
Fabrikantnummer3SK1121-2CB42
FabrikantSiemens
244,72 €
Each
Aantal stuks
24 V dc 1 - - - - - 4 SIRIUS Automatic, Monitored - Cage Clamp - -
RS-stocknr. 184-0136
Fabrikantnummer3SK29412AA10
FabrikantSiemens
347,74 €
Each
Aantal stuks
- 2 - - - - - - SIRIUS - PLe 3, SIL 3, 4 Plug In - -
RS-stocknr. 202-1668
Fabrikantnummer3SK1220-1AB40
FabrikantSiemens
191,00 €
Each
Aantal stuks
24 V 1 - Safety Relay - - - - - - - - - -
RS-stocknr. 183-7200
Fabrikantnummer3SK2122-1AA10
FabrikantSiemens
443,44 €
Each
Aantal stuks
24 V dc 4 - - - - - - SIRIUS - PLe, SIL 3 Screw - -
Nieuw
RS-stocknr. 211-9559
Fabrikantnummer3SK1211-2BW20
FabrikantSiemens
232,00 €
Each
Aantal stuks
110-240 V 2 1 Emergency Stop - - - 4 - - - - - -
RS-stocknr. 784-5844
Fabrikantnummer3SK1122-2CB42
FabrikantSiemens
147,20 €
Each
Aantal stuks
24 V dc 1 - - - - - - SIRIUS Automatic, Monitored - Cage Clamp - -
RS-stocknr. 197-3299
Fabrikantnummer3SK1912-3SB40
FabrikantSiemens
1.324,66 €
Each
Aantal stuks
24 V - None Emergency Stop - - - - Sirius Safety - - - - -
RS-stocknr. 202-1667
Fabrikantnummer3SK1112-2BB40
FabrikantSiemens
200,00 €
Each
Aantal stuks
24 V 1 - Safety Relay - - - 2 - - - - - -
RS-stocknr. 202-1665
Fabrikantnummer3SK1122-1AB40
FabrikantSiemens
240,00 €
Each
Aantal stuks
24 V 1 - Safety Relay - - - 3 - - - - - -
RS-stocknr. 784-5829
Fabrikantnummer3SK1122-1CB41
FabrikantSiemens
147,20 €
Each
Aantal stuks
24 V dc 1 - - - - - - SIRIUS Automatic, Monitored - Screw - -
RS-stocknr. 784-5825
Fabrikantnummer3SK1121-2CB44
FabrikantSiemens
244,72 €
Each
Aantal stuks
24 V dc 1 - - - - - 4 SIRIUS Automatic, Monitored - Cage Clamp - -
RS-stocknr. 784-5835
Fabrikantnummer3SK1122-2CB41
FabrikantSiemens
147,20 €
Each
Aantal stuks
24 V dc 1 - - - - - - SIRIUS Automatic, Monitored - Cage Clamp - -
RS-stocknr. 784-5816
Fabrikantnummer3SK1121-1CB44
FabrikantSiemens
244,72 €
Each
Aantal stuks
24 V dc 1 - - - - - 4 SIRIUS Automatic, Monitored - Screw - -
RS-stocknr. 183-7198
Fabrikantnummer3SK2112-1AA10
FabrikantSiemens
301,76 €
Each
Aantal stuks
24 V dc 2 - - - - - - SIRIUS - PLe, SIL 3 Screw - -
RS-stocknr. 784-5847
Fabrikantnummer3SK1122-2CB44
FabrikantSiemens
147,20 €
Each
Aantal stuks
24 V dc 1 - - - - - - SIRIUS Automatic, Monitored - Cage Clamp - -