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.

...
Read more Read less

Filters

Viewing 41 - 60 of 470 products
Results per page
Description Price Supply Voltage Number of Channels Auxiliary Contacts Function Safety Contacts Range Reset Method Safety Category Terminal Type Standards Met Depth Hazardous Area Certification Length Width
RS Stock No. 784-5825
Mfr. Part No.3SK1121-2CB44
BrandSiemens
TWD15,991.00
Each
units
24 V dc 1 - - 4 SIRIUS Automatic, Monitored - Cage Clamp - 121.7mm - 100mm 22.5mm
RS Stock No. 890-3382
Mfr. Part No.G9SE-401-DC24
BrandOmron
TWD4,320.00
Each
units
24 V dc 2 1 Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock 4 - Automatic, Manual - Screw CAN C22.2 No.14, CSA C22.2 No.14, EN 62061 SIL3, EN 81-1, EN 81-2, EN ISO 13849-1: 2008 PL e Safety Category 4, EN/IEC 60947-5-1, GB 14048.5, IEC 62061 SIL 3, UL508 111.6mm - 144.5mm 22.5mm
RS Stock No. 731-8951
Mfr. Part No.XPSBCE3110P
TWD12,889.00
Each
units
24 V ac/dc - 1 Two-Hand Control 2 Preventa - - Screw - 114mm - 99mm 22.5mm
RS Stock No. 733-2389
Mfr. Part No.2TLA010028R2400
BrandABB
TWD13,525.00
Each
units
115 V ac 1, 2 - Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock 5 - - - Terminal Block - 120mm - 84mm 45mm
RS Stock No. 731-8976
Mfr. Part No.XPSBCE3710P
TWD13,132.00
Each
units
230 V ac - 1 Two-Hand Control 2 Preventa - - Screw - 114mm - 99mm 22.5mm
RS Stock No. 812-8979
Mfr. Part No.118703 & ESR5-NZ-21-24VAC-DC
BrandEaton
TWD9,811.00
Each
units
- 2 - Safety Switch/Interlock, Two Hand Control 2 - Automatic, Manual - Screw - 99mm - 22.5mm 114.5mm
RS Stock No. 203-8035
Mfr. Part No.774073
BrandPilz
TWD7,609.00
Each
units
24 V dc, 110 V ac 2 - Safety Switch/Interlock 2 - Automatic, Manual - Screw - 121mm - 87mm 45mm
RS Stock No. 666-7117
Mfr. Part No.2963776
TWD4,594.00
Each
units
24 V ac/dc 2 1 Emergency Stop, Safety Switch/Interlock 3 - - 3 Screw - 114.5mm - 99mm 22.5mm
RS Stock No. 176-0032
Mfr. Part No.2TLA010050R0100 Sentry SSR10M VAC/VDC
BrandABB Jokab
TWD7,433.00
Each
units
265 V ac, 375 V dc 2 3NO/NC Safety Switch 4 Sentry Multi-Reset 4 Screw - 120mm - 22.5mm 120mm
RS Stock No. 201-1467
Mfr. Part No.XPSUAT33A3AC
TWD13,982.00
Each
units
24 V ac/dc 1 8 Emergency Stop 5 Preventa - PLe Category 4, SIL CL3 Spring CCC, CE, CULus, EAC, FS, Green Premium, K-Mark, RCM, REACH, RoHS, S-Mark 120mm - 100mm 45mm
RS Stock No. 656-6130
Mfr. Part No.LG5933.48 DC24V
BrandDold
TWD9,604.00
Each
units
24 V ac/dc - 1 Two-Hand Control 3 Safemaster Monitored - Screw - 121mm - 90mm 22.5mm
RS Stock No. 191-9873
Mfr. Part No.751187
BrandPilz
TWD7,044.00
Each
units
24 V dc 2 1 Safety Switch 4 PNOZ s7 Automatic 4 Cage Clamp - 120mm - 98mm 17.5mm
RS Stock No. 893-7682
Mfr. Part No.2700467
TWD4,885.00
Each
units
24 V dc 1 3 Emergency Stop, Safety Switch/Interlock 3 PSRmini Automatic, Manual 1 Cage Clamp CUL, CULus, EAC, Functional Safety, UL 114.5mm - 112.2mm 12.5mm
New
RS Stock No. 211-9558
Mfr. Part No.3SK1120-2AB40
BrandSiemens
TWD7,655.00
Each
units
24 V 2 1 - 1 - - - - - - - - -
RS Stock No. 177-4035
Mfr. Part No.2700572
TWD6,110.00
Each
units
24 V dc 1 - Two Hand Control 2 - Manual 1 Terminal Block - 114.5mm - 116.6mm 12.5mm
RS Stock No. 176-0030
Mfr. Part No.2TLA010051R0100 Sentry SSR20M VAC/VDC
BrandABB Jokab
TWD8,278.00
Each
units
265 V ac, 375 V dc - 3NO/NC Safety Switch 4 Sentry Multi-Reset 4 Screw - 120mm - 22.5mm 120mm
RS Stock No. 146-5867
Mfr. Part No.SRB-E-212ST
BrandSchmersal
TWD11,608.00
Each
units
24 V dc 1, 2 - - - - Automatic - Plug In, Screw - 98mm - 22.5mm 115mm
RS Stock No. 125-1100
Mfr. Part No.XPSPVK3484
TWD20,875.00
Each
units
24 V dc - - Emergency Stop, Safety Switch/Interlock 2 Preventa Manual PLe Category 4, SIL CL3 Screw CSA, TUV, UL - - - -
RS Stock No. 327-7613
Mfr. Part No.BH5928.92 DC24V 1-10S
BrandDold
TWD15,563.00
Each
units
24 V ac/dc 1, 2 - Emergency Stop 3 Safemaster - - - - 118mm - 84mm 45mm
RS Stock No. 146-5863
Mfr. Part No.SRB-E-201LC
BrandSchmersal
TWD6,686.00
Each
units
24 V dc 1, 2 - - - - Automatic - Plug In, Screw - 98mm - 22.5mm 115mm