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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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. 360-4346
Mfr. Part No.XPSAF5130
TWD6,726.00
Each
units
24 V ac/dc 1, 2 - Safety Switch/Interlock 3 Preventa - - Screw - 114mm - 99mm 22.5mm
RS Stock No. 477-3847
Mfr. Part No.XPSAV11113
TWD13,448.00
Each
units
24 V 1, 2 - Emergency Stop 3 Preventa - - - - 114mm - 99mm 45mm
RS Stock No. 609-7167
Mfr. Part No.XPSAFL5130
TWD10,116.00
Each
units
24 V ac/dc 1, 2 - Light Beam/Curtain 3 Preventa - - Screw - 114mm - 99mm 22.5mm
RS Stock No. 814-6924
Mfr. Part No.XPSAC3421P
TWD10,409.00
Each
units
115 V ac 1 1 Emergency Stop, Safety Switch/Interlock 3 Preventa Monitored - Screw - 114mm - 99mm 22.5mm
New
RS Stock No. 201-1466
Mfr. Part No.XPSUAT13A3AC
TWD12,793.00
Each
units
24 V ac/dc 1 8 Emergency Stop 5 - - - - - - - - -
RS Stock No. 814-6946
Mfr. Part No.XPSDMB1132P
TWD10,217.00
Each
units
24 V dc 1 2 Safety Switch/Interlock 2 Preventa Monitored - Screw - 114mm - 99mm 22.5mm
New
RS Stock No. 201-1467
Mfr. Part No.XPSUAT33A3AC
TWD14,038.00
Each
units
24 V ac/dc 1 8 Emergency Stop 5 - - - - - - - - -
RS Stock No. 814-6927
Mfr. Part No.XPSAC5121P
TWD6,925.00
Each
units
24 V ac/dc 1 1 Emergency Stop, Safety Switch/Interlock 3 Preventa Monitored - Screw - 114mm - 99mm 22.5mm
RS Stock No. 447-4506
Mfr. Part No.XPSAR311144
TWD14,133.00
Each
units
24 V dc 1, 2 2 Light Beam/Curtain 7 Preventa - - - - 114mm - 99mm 99mm
RS Stock No. 447-4540
Mfr. Part No.XPSDME1132
TWD11,121.00
Each
units
24 V dc 1, 2 2 Safety Switch/Interlock 2 Preventa - - Screw - 114mm - 22.5mm 99mm
RS Stock No. 814-6930
Mfr. Part No.XPSAK311144P
TWD10,478.00
Each
units
24 V ac/dc 2 1 Emergency Stop, Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock 3 Preventa Monitored - Screw - 114mm - 99mm 45mm
RS Stock No. 814-6949
Mfr. Part No.XPSDME1132P
TWD14,345.00
Each
units
24 V dc 1 2 Safety Switch/Interlock 2 Preventa Monitored - Screw - 114mm - 99mm 45mm
RS Stock No. 181-1416
Mfr. Part No.XPSATE5110P
TWD14,199.00
Each
units
100 - 120 V, 200 - 240 V - - - - - - - - - - - - -
New
RS Stock No. 201-1468
Mfr. Part No.XPSUAB31CC
TWD4,894.00
Each
units
48-230 V ac/dc 1 8 Emergency Stop Monitoring 2 - - - - - - - - -
New
RS Stock No. 200-6136
Mfr. Part No.XPSUAT33A3AP
TWD16,890.00
Each
units
48 to230 V 3 - Emergency Stop 7 - - - - - - - - -
New
RS Stock No. 201-1471
Mfr. Part No.XPSUAB11CC
TWD4,422.00
Each
units
24 V ac/dc 1 8 Emergency Stop 2 - - - - - - - - -
RS Stock No. 464-489
Mfr. Part No.XPSVNE1142HSP
TWD15,874.00
Each
units
24 V dc 2 2 Speed/Standstill Monitoring 2 Preventa - - Screw - 99mm - 120mm 45mm
RS Stock No. 477-8684
Mfr. Part No.XPSCM1144
TWD11,659.00
Each
units
24 V dc - 4 Light Beam/Curtain 2 Preventa - - Screw - - - - -
RS Stock No. 731-8951
Mfr. Part No.XPSBCE3110P
TWD11,737.00
Each
units
24 V ac/dc - 1 Two-Hand Control 2 Preventa - - Screw - 114mm - 99mm 22.5mm
New
RS Stock No. 201-1464
Mfr. Part No.XPSUAF33AC
TWD7,298.00
Each
units
48-230 V ac/dc 1 4 Emergency Stop 5 - - - - - - - - -