Safety Relays

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 Safety Contacts Function Auxiliary Contacts Reset Method Range Safety Category Terminal Type Length Width Depth
RS庫存編號 360-4346
製造零件編號XPSAF5130
TWD6,926.00
單位
24 V ac/dc 3 Safety Switch/Interlock - - Preventa - Screw - - -
RS庫存編號 245-1854
製造零件編號774318
BrandPilz
TWD9,011.00
單位
24 V dc, 230 V ac 3 Emergency Stop 1 Automatic, Monitored PNOZ X - Screw - - -
RS庫存編號 784-5793
製造零件編號3SK1111-2AB30
BrandSiemens
TWD9,160.00
單位
24 V ac/dc 4 - - Automatic, Monitored SIRIUS - Cage Clamp - - -
RS庫存編號 733-5117
製造零件編號50.12.9.048.5000
BrandFinder
TWD652.00
單位
- - - - - - - - - - -
RS庫存編號 245-1905
製造零件編號774500
BrandPilz
TWD13,436.00
單位
24 V dc 2 Safety Switch/Interlock - Automatic, Manual, Monitored PNOZ X - Screw - - -
RS庫存編號 549-609
製造零件編號G9SA-301 24AC/DC
BrandOmron
TWD7,472.00
單位
24 V ac/dc 3 Emergency Stop 1 - - - - - - -
RS庫存編號 378-5366
製造零件編號774315
BrandPilz
TWD8,247.00
單位
24 V dc, 115 V ac 3 Safety Switch/Interlock 1 Automatic, Monitored PNOZ X - Screw - - -
RS庫存編號 918-6677
製造零件編號774502
BrandPilz
TWD14,218.00
單位
- 2 Emergency Stop, Safety Switch/Interlock 2 Automatic, Manual - PLe Category 4, SIL CL3 - - - -
RS庫存編號 666-7062
製造零件編號2981680
TWD9,129.00
單位
24 V dc 6 Expansion Module - - - 3 Screw - - -
RS庫存編號 666-7069
製造零件編號2981499
TWD8,312.00
單位
24 V dc 2 Safety Switch/Interlock 1 - - 3 Screw - - -
RS庫存編號 489-6394
製造零件編號777949
BrandPilz
TWD18,288.00
單位
24 → 240 V ac/dc 2 Speed/Standstill Monitoring 1 - PNOZ X PLe Category 4 Screw - - -
RS庫存編號 156-106
製造零件編號750104
BrandPilz
TWD10,243.00
單位
24 V dc 3 Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock 1 Automatic, Manual, Monitored PNOZsigma - Screw - - -
RS庫存編號 122-2499
製造零件編號R1.188.0620.0
BrandWieland
TWD8,897.00
單位
- 3 Elevator System, Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock - Monitored - - - - - -
RS庫存編號 477-3847
製造零件編號XPSAV11113
TWD20,311.00
單位
24 V 3 Emergency Stop - - Preventa - - - - -
RS庫存編號 489-6350
製造零件編號777302
BrandPilz
TWD7,142.00
單位
24 → 240 V ac/dc 3 Safety Switch/Interlock 1 Manual PNOZ X PLe Category 4 Screw - - -
RS庫存編號 239-1033
製造零件編號774300
BrandPilz
TWD7,792.00
單位
24 V ac/dc 3 Safety Switch/Interlock 1 Automatic, Manual PNOZ X - Screw - - -
RS庫存編號 733-2351
製造零件編號2TLA010026R0500 RT6 230AC
BrandABB
TWD14,095.00
單位
230 V ac 4 Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock - - - - Terminal Block - - -
RS庫存編號 784-5780
製造零件編號3SK1111-1AB30
BrandSiemens
TWD8,651.00
單位
24 V ac/dc 4 - - Automatic, Monitored SIRIUS - Screw - - -
RS庫存編號 609-7167
製造零件編號XPSAFL5130
TWD10,121.00
單位
24 V ac/dc 3 Light Beam/Curtain - - Preventa - Screw - - -
RS庫存編號 757-9310
製造零件編號G9SA-321-T075 AC/DC24
BrandOmron
TWD12,397.00
單位
24 V ac/dc 3 Emergency Stop 1 - - - - - - -