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庫存編號 447-4540
製造零件編號XPSDME1132
HK$2,844.05
單位
24 V dc 1, 2 2 Safety Switch/Interlock 2 Preventa - - Screw - 114mm - 22.5mm 99mm
RS庫存編號 447-4477
製造零件編號XPSAC5121
HK$1,648.53
單位
24 V ac/dc - 1 Emergency Stop 3 Preventa - - Screw - 114mm - 99mm 22.5mm
RS庫存編號 447-4499
製造零件編號XPSAC3721
HK$1,191.07
單位
230 V ac - 1 Emergency Stop 3 Preventa - - Screw - 114mm - 99mm 22.5mm
RS庫存編號 731-8951
製造零件編號XPSBCE3110P
HK$2,330.00
單位
24 V ac/dc - 1 Two-Hand Control 2 Preventa - - Screw - 114mm - 99mm 22.5mm
RS庫存編號 464-495
製造零件編號XPSATE3710P
HK$6,167.80
單位
230 V ac 2 4 Emergency Stop, Safety Mat/Edge, Safety Switch/Interlock 2 Preventa Automatic, Manual - Screw - 114mm - 99mm 45mm
RS庫存編號 422-5180
製造零件編號XPSAK371144
HK$4,544.04
單位
230 V ac 2 1 Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock 3 Preventa Automatic, Manual - Screw - 114mm - 99mm 45mm
RS庫存編號 447-4483
製造零件編號XPSAC3421
HK$1,090.00
單位
115 V ac - 1 Emergency Stop 3 Preventa - - Screw - 114mm - 99mm 22.5mm
RS庫存編號 477-3847
製造零件編號XPSAV11113
HK$2,884.00
單位
24 V 1, 2 - Emergency Stop 3 Preventa - - - - 114mm - 99mm 45mm
RS庫存編號 360-4346
製造零件編號XPSAF5130
HK$1,658.80
單位
24 V ac/dc 1, 2 - Safety Switch/Interlock 3 Preventa - - Screw - 114mm - 99mm 22.5mm
RS庫存編號 609-7167
製造零件編號XPSAFL5130
HK$2,553.67
單位
24 V ac/dc 1, 2 - Light Beam/Curtain 3 Preventa - - Screw - 114mm - 99mm 22.5mm
RS庫存編號 181-1415
製造零件編號XPSATE5110
HK$4,126.45
單位
200 - 240 V, 380 - 480 V - - - - - - - - - - - - -
RS庫存編號 125-1101
製造零件編號XPSPVT1180
HK$11,264.41
單位
24 V dc - - Emergency Stop, Safety Switch/Interlock 3 Preventa Manual PLe Category 4, SIL CL3 Screw CSA, TUV, UL - - - -
RS庫存編號 731-8960
製造零件編號XPSBCE3410C
HK$3,271.84
單位
115 V ac - 1 Two-Hand Control 2 Preventa - - Cage Clamp - 114mm - 111mm 22.5mm
全新
RS庫存編號 201-1497
製造零件編號XPSUEP34AC
HK$1,716.00
單位
24 V ac/dc 1 4 Emergency Stop Monitoring 5 - - - - - - - - -
RS庫存編號 447-4584
製造零件編號XPSVC1132
HK$2,711.28
單位
24 V dc - 2 - 2 Preventa - - - - 114mm - 99mm 22.5mm
RS庫存編號 181-1416
製造零件編號XPSATE5110P
HK$3,361.76
單位
100 - 120 V, 200 - 240 V - - - - - - - - - - - - -
全新
RS庫存編號 201-1483
製造零件編號XPSUDN33AP
HK$2,905.76
單位
24 V ac/dc 1 4 Emergency Stop 5 - - - - - - - - -
RS庫存編號 464-491
製造零件編號XPSATE5110P
HK$3,347.50
單位
24 V dc 2 4 Emergency Stop, Safety Mat/Edge, Safety Switch/Interlock 2 Preventa Automatic, Manual - Screw - 114mm - 99mm 45mm
全新
RS庫存編號 201-1460
製造零件編號XPSUAF33AP
HK$1,944.80
單位
48-230 V ac/dc 1 4 Emergency Stop 5 - - - - - - - - -
RS庫存編號 731-8963
製造零件編號XPSBCE3410P
HK$3,077.36
單位
115 V ac - 1 Two-Hand Control 2 Preventa - - Screw - 114mm - 99mm 22.5mm