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. 731-8960
FabrikantnummerXPSBCE3410C
€ 299,88
Each
Aantal stuks
115 V ac - 1 Two-Hand Control - - - 2 Preventa - - Cage Clamp - -
RS-stocknr. 122-2500
FabrikantnummerR1.188.0720.2
FabrikantWieland
€ 177,18
Each
Aantal stuks
24 V ac/dc 2 1 Elevator System, Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock - - - 2 SafeRELAY Monitored - Screw CCC, CPT, CULus, DGUV, EN 62061, EN ISO 13849-1, GOST R -
RS-stocknr. 751-1024
Fabrikantnummer440R-D22R2
€ 295,00
Each
Aantal stuks
24 V dc 2 1 Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock 4 3 E 2 Guardmaster Automatic, Manual, Monitored - Screw - Yes
RS-stocknr. 515-1787
FabrikantnummerR1.188.0530.1
FabrikantWieland
€ 170,47
Each
Aantal stuks
24 V ac/dc 2 1 Two-Hand Control - - - 2 SafeRELAY Monitored - Screw - -
RS-stocknr. 731-8951
FabrikantnummerXPSBCE3110P
€ 295,65
Each
Aantal stuks
24 V ac/dc - 1 Two-Hand Control - - - 2 Preventa - - Screw - -
RS-stocknr. 481-8237
FabrikantnummerXPSAK351144
€ 209,97
Each
Aantal stuks
120 V ac 2 1 Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock - - - 3 Preventa Automatic, Manual - 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. 784-5793
Fabrikantnummer3SK1111-2AB30
FabrikantSiemens
€ 153,95
Each
Aantal stuks
24 V ac/dc 1 - - - - - 4 SIRIUS Automatic, Monitored - Cage Clamp - -
RS-stocknr. 324-7252
Fabrikantnummer774053
FabrikantPilz
€ 120,40
Each
Aantal stuks
110 V ac 1 - Safety Switch/Interlock - - - 2 PNOZ X - - Screw - -
RS-stocknr. 741-8666
FabrikantnummerSRB324ST 24V (V.3)
FabrikantSchmersal
€ 307,91
Each
Aantal stuks
24 V ac/dc 1, 2 - Light Beam/Curtain, Safety Switch/Interlock - - - - PROTECT - - Screw - -
RS-stocknr. 362-0174
Fabrikantnummer774350
FabrikantPilz
€ 346,89
Each
Aantal stuks
24 V dc 2 1 Two-Hand Control - - - 2 PNOZ X Monitored - Screw - -
RS-stocknr. 814-6946
FabrikantnummerXPSDMB1132P
€ 223,11
Each
Aantal stuks
24 V dc 1 2 Safety Switch/Interlock - - - 2 Preventa Monitored - Screw - -
RS-stocknr. 656-6051
FabrikantnummerRK5942.03 AC/DC24V
FabrikantDold
€ 112,06
Each
Aantal stuks
24 V ac/dc 1 - Emergency Stop - - - - Safemaster - - Screw - -
RS-stocknr. 515-1759
FabrikantnummerR1.188.0500.1
FabrikantWieland
€ 141,12
Each
Aantal stuks
24 V ac/dc 2 1 Safety Switch/Interlock - - - 3 SafeRELAY Monitored - Screw - -
RS-stocknr. 733-2351
Fabrikantnummer2TLA010026R0500
FabrikantABB
€ 236,70
Each
Aantal stuks
230 V ac 1, 2 - Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock - - - 4 - - - Terminal Block - -
RS-stocknr. 549-603
FabrikantnummerG9SB301DACDC24
FabrikantOmron
€ 148,46
Each
Aantal stuks
24 V ac/dc 2 1 Emergency Stop - - - 3 - Manual - - - -
RS-stocknr. 757-9320
FabrikantnummerG9SX-GS226-T15-RT DC24
FabrikantOmron
€ 380,16
Each
Aantal stuks
24 V dc 2 - Safety Switch/Interlock - - - - - - - Screw - -
RS-stocknr. 125-1095
FabrikantnummerXPSAK371144P
€ 233,19
Each
Aantal stuks
24 V dc, 230 V ac 2 - Emergency Stop, Safety Mat/Edge, Safety Switch/Interlock - - - 1 Preventa Manual PLe Category 4, SIL CL3 Screw CSA, EN/IEC 60204-1, EN/IEC 60947-5-1, TUV, UL -
RS-stocknr. 203-8063
Fabrikantnummer774030
FabrikantPilz
€ 159,50
Each
Aantal stuks
24 V dc 1 2 Speed/Standstill Monitoring - - - 1 PNOZ X - - Screw - -
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 - -
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