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 421 - 440 of 461 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. 201-3776
Mfr. Part No.1009831
MYR1,211.06
Each
units
24 V dc 2 None Emergency Stop 2 - - - - - - - - -
RS Stock No. 200-6143
Mfr. Part No.XPSUS32AP
MYR2,872.78
Each
units
48 → 230 V ac/dc 2 - Emergency Stop 2 Preventa - PLe Category 4, SIL CL3 Screw CCC, CE, CULus, EAC, FS, Green Premium, K-Mark, RCM, REACH, RoHS, S-Mark 120mm - 100mm 22.5mm
RS Stock No. 176-0025
Mfr. Part No.2TLA010061R0000 Sentry TSR20 24VDC
BrandABB Jokab
MYR916.27
Each
units
24 V dc 3 3NO/NC Safety Switch 4 Sentry Multi-Reset 4 Screw - 120mm - 22.5mm 120mm
RS Stock No. 176-0032
Mfr. Part No.2TLA010050R0100 Sentry SSR10M VAC/VDC
BrandABB Jokab
MYR1,118.38
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. 191-9863
Mfr. Part No.751132
BrandPilz
MYR1,280.54
Each
units
24 V dc 2 2 Safety Switch 3 PNOZ s22 Automatic 4 Cage Clamp - 120mm - 98mm 22.5mm
RS Stock No. 176-0034
Mfr. Part No.2TLA010041R0600 Sentry BSR23 24VDC
BrandABB Jokab
MYR713.73
Each
units
24 V dc - 4NO/NC Safety Switch 5 Sentry Multi-Reset 4 Screw - 120mm - 22.5mm 120mm
New
RS Stock No. 207-2689
Mfr. Part No.2702522
MYR1,828.53
Each
units
24 V 1 1 Safety Switch 1 - - - - - - - - -
RS Stock No. 176-0022
Mfr. Part No.2TLA010070R0400 Sentry USR22 24VDC
BrandABB Jokab
MYR1,846.56
Each
units
24 V dc 5 4 Safety Switch 4 Sentry Multi-Reset 4 Screw - 120mm - 22.5mm 120mm
RS Stock No. 464-489
Mfr. Part No.XPSVNE1142HSP
MYR2,592.15
Each
units
24 V dc 2 2 Speed/Standstill Monitoring 2 Preventa - - Screw - 99mm - 120mm 45mm
New
RS Stock No. 207-2698
Mfr. Part No.2903262
MYR2,038.38
Each
units
24 V 2 1 Safety Switch 4 - - - - - - - - -
RS Stock No. 741-8669
Mfr. Part No.SRB202CA/QT 24VDC
BrandSchmersal
MYR2,584.67
Each
units
24 V dc 2 - Safety Switch/Interlock - PROTECT - - Screw - 121mm - 100mm 22.5mm
RS Stock No. 731-8957
Mfr. Part No.XPSBCE3110C
MYR2,100.78
Each
units
24 V ac/dc - 1 Two-Hand Control 2 Preventa - - Cage Clamp - 114mm - 111mm 22.5mm
RS Stock No. 812-8957
Mfr. Part No.118700 & ESR5-NO-21-24VAC-DC
BrandEaton
MYR1,412.12
Each
units
- 2 - Emergency Stop, Safety Switch/Interlock 2 - Automatic, Manual - Screw - 99mm - 22.5mm 114.5mm
RS Stock No. 731-8960
Mfr. Part No.XPSBCE3410C
MYR2,100.78
Each
units
115 V ac - 1 Two-Hand Control 2 Preventa - - Cage Clamp - 114mm - 111mm 22.5mm
RS Stock No. 447-4540
Mfr. Part No.XPSDME1132
MYR2,047.51
Each
units
24 V dc 1, 2 2 Safety Switch/Interlock 2 Preventa - - Screw - 114mm - 22.5mm 99mm
RS Stock No. 191-9875
Mfr. Part No.751330
BrandPilz
MYR4,866.33
Each
units
24 → 240 V ac/dc - 2 Safety Switch 2 PNOZ s30 Automatic, Manual 2, 4 Cage Clamp - 120mm - 98mm 45mm
RS Stock No. 191-9853
Mfr. Part No.751102
BrandPilz
MYR929.31
Each
units
24 V dc 2 1 - 3 PNOZ s2 Automatic, Manual 4 Cage Clamp - 120mm - 98mm 17.5mm
RS Stock No. 177-9020
Mfr. Part No.SCR4-W22-3.5-SD
MYR892.17
Each
units
24 V dc, 230 V ac 1 3NO/NC Two-Hand Control - - - - Screw - 114.5mm - 22.5mm 99mm
RS Stock No. 757-9301
Mfr. Part No.G9SB-3010 DC24
BrandOmron
MYR896.42
Each
units
24 V dc 2 1 Emergency Stop 3 - - - - - 112mm - 100mm 18mm
RS Stock No. 198-582
Mfr. Part No.XPSAR351144P
MYR3,126.24
Each
units
115 V ac 2 2 Emergency Stop, Light Beam/Curtain 7 Preventa Automatic, Manual - Screw - 114mm - 99mm 90mm