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 Safety Contacts Function Auxiliary Contacts Reset Method Range Safety Category Terminal Type Standards Met Depth Hazardous Area Certification Length Width
RS庫存編號 893-7711
製造零件編號2904950
HK$1,138.99
單位
24 V dc 1 1 Emergency Stop, Safety Switch/Interlock 1 Automatic PSRmini 1 Screw CUL, CULus, EAC, Functional Safety, UL 102.5mm - 93.1mm 6.8mm
RS庫存編號 666-7044
製造零件編號2963802
HK$1,299.42
單位
24 V ac/dc 1 4 Emergency Stop, Safety Switch/Interlock 1 - - 1 Screw - 114.5mm - 99mm 22.5mm
RS庫存編號 666-7022
製造零件編號2981020
HK$1,224.79
單位
24 V dc 1 3 Emergency Stop, Safety Switch/Interlock - - - - Screw - 114.5mm - 99mm 22.5mm
全新
RS庫存編號 207-2689
製造零件編號2702522
HK$3,740.26
單位
24 V 1 1 Safety Switch 1 - - - - - - - - -
全新
RS庫存編號 207-2690
製造零件編號2702663
HK$1,574.74
單位
24 V 1 1 Safety Switch 1 - - - - - - - - -
RS庫存編號 201-6245
製造零件編號2902725
HK$3,852.62
單位
24 V dc 4 3 Emergency Stop, Safety Switch None - - - - - - - - -
RS庫存編號 712-5248
製造零件編號2900525
HK$1,851.68
單位
24 V ac/dc 2 2 Safety Switch/Interlock 1 - - 3 Screw - 114.5mm - 99mm 22.5mm
全新
RS庫存編號 220-5833
製造零件編號2987338
HK$87.874
/個 (每包:10個)
單位
250 V - - - 1 - - - - - - - - -
RS庫存編號 190-8414
製造零件編號2702902
HK$2,679.17
單位
24 V dc 2 2 - - Automatic, Manual, Monitored - PLe Category 4, SILCL 3 Plug-In - 116.6mm - 17.5mm 114.5mm
全新
RS庫存編號 207-2691
製造零件編號2702901
HK$3,657.36
單位
24 V 1, 2 2 Safety Switch 1 - - - - - - - - -
RS庫存編號 201-3861
製造零件編號1015503
HK$2,058.06
單位
24 V dc 2 2 Emergency Stop, Safety Switch None - - - - - - - - -
RS庫存編號 201-6246
製造零件編號2902726
HK$3,816.86
單位
24 V dc 4 3 Emergency Stop, Safety Switch None - - - - - - - - -
RS庫存編號 201-5356
製造零件編號2702412
HK$2,104.34
單位
24 V dc 3 3 Emergency Stop, Safety Switch None - - - - - - - - -
全新
RS庫存編號 212-8812
製造零件編號2963996
HK$5,161.98
單位
24 V 1, 2 8 Safety Switch 1 - - - - - - - - -
RS庫存編號 801-5943
製造零件編號2981062
HK$2,034.10
單位
24 V ac/dc 2 4 Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock - Automatic, Manual - 3 Cage Clamp - 114.5mm - 112mm 22.5mm
全新
RS庫存編號 220-5644
製造零件編號1087561
HK$3,108.75
單位
24 V 1 or 2 2 Emergency Stop 3 - - - - - - - - -
全新
RS庫存編號 207-2698
製造零件編號2903262
HK$4,169.51
單位
24 V 2 4 Safety Switch 1 - - - - - - - - -
RS庫存編號 177-4036
製造零件編號2700575
HK$1,847.40
單位
24 V dc 2 2 Two Hand Control - Manual - 1 Terminal Block - 114.5mm - 116.6mm 12.5mm
RS庫存編號 201-5581
製造零件編號2903254
HK$3,816.86
單位
24 V dc 4 3 Emergency Stop, Safety Switch None - - - - - - - - -
全新
RS庫存編號 207-2680
製造零件編號2700524
HK$3,820.35
單位
24 V 1, 2 3 Safety Switch 1 - - - - - - - - -