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 780-5091
製造零件編號R1.188.3710.0 - SNZ1022K-A
BrandWieland
HK$1,460.75
單位
115 → 230 V ac 2 2 - - - SafeRELAY - Screw - - - - -
RS庫存編號 780-5073
製造零件編號R1.188.3580.0 - SNO4083KM-A
BrandWieland
HK$2,265.37
單位
24 V dc 2 3 - - Manual SafeRELAY - Screw - - - - -
RS庫存編號 515-1787
製造零件編號R1.188.0530.1
BrandWieland
HK$1,548.37
單位
24 V ac/dc 2 2 Two-Hand Control 1 Monitored SafeRELAY - Screw - 114mm - 96.5mm 22.5mm
RS庫存編號 122-2492
製造零件編號R1.188.2070.0
BrandWieland
HK$3,264.31
單位
24 V dc 2 7 Elevator System, Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock - Automatic, Manual, Monitored SafeRELAY - Screw CCC, CPT, CULus, EN 50156-1, EN 62061, EN ISO 13849-1, FS, GL, GOST R, TUV 96.5mm - 45mm 114mm
RS庫存編號 122-2493
製造零件編號R1.188.1840.0
BrandWieland
HK$1,925.72
單位
230 V ac 2 3 Elevator System, Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock 1 Manual SafeRELAY - Screw CCC, CPT, CULus, EN 50156-1, EN 61511, EN 62061, EN 81-1, EN ISO 13849-1, FS, GL, GOST R, TUV 96.5mm - 22.5mm 114mm
RS庫存編號 122-2494
製造零件編號R1.188.2040.0
BrandWieland
HK$3,307.23
單位
24 V dc 2 7 Elevator System, Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock - Automatic, Manual, Monitored SafeRELAY - Screw CCC, CPT, CULus, EN 50156-1, EN 62061, EN ISO 13849-1, FS, GL, GOST R, TUV 96.5mm - 45mm 114mm
RS庫存編號 122-2498
製造零件編號R1.188.1440.0
BrandWieland
HK$1,942.77
單位
24 V ac/dc 2 3 Elevator System, Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock 1 Manual, Monitored SafeRELAY - Screw CCC, CULus, EN 50156-1, EN 61511, EN 62061, EN 81-1, EN ISO 13849-1, GL, GOST R, TUV 96.5mm - 22.5mm 114mm
RS庫存編號 122-2495
製造零件編號R1.188.1460.0
BrandWieland
HK$1,987.16
單位
230 V ac 2 3 Elevator System, Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock 1 Manual, Monitored SafeRELAY - Screw CCC, CPT, CULus, EN 50156-1, EN 61511, EN 62061, EN 81-1, EN ISO 13849-1, FS, GL, GOST R, TUV 96.5mm - 22.5mm 114mm
RS庫存編號 780-5098
製造零件編號R1.188.3700.0 - SNZ1022K-A
BrandWieland
HK$1,263.74
單位
24 V dc 2 2 - - - SafeRELAY - Screw - - - - -
RS庫存編號 780-5089
製造零件編號R1.188.3840.0 - SNO4083KM-A
BrandWieland
HK$2,001.31
單位
115 → 230 V ac 2 3 - - Manual SafeRELAY - Screw - - - - -
RS庫存編號 122-2497
製造零件編號R1.188.1810.0
BrandWieland
HK$1,774.43
單位
24 V ac/dc 2 3 Elevator System, Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock 1 Manual SafeRELAY - Screw CCC, CPT, CULus, EN 50156-1, EN 61511, EN 62061, EN 81-1, EN ISO 13849-1, FS, GL, GOST R, TUV 96.5mm - 22.5mm 114mm
RS庫存編號 122-2496
製造零件編號R1.188.1450.0
BrandWieland
HK$1,584.27
單位
115 → 120 V ac 2 3 Elevator System, Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock 1 Manual, Monitored SafeRELAY - Screw CCC, CPT, CULus, EN 50156-1, EN 61511, EN 62061, EN 81-1, EN ISO 13849-1, FS, GL, GOST R, TUV 96.5mm - 22.5mm 114mm
RS庫存編號 122-2491
製造零件編號R1.188.1830.0
BrandWieland
HK$1,911.82
單位
115 → 120 V ac 2 3 Elevator System, Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock 1 Manual SafeRELAY - Screw CCC, CPT, CULus, EN 50156-1, EN 61511, EN 62061, EN 81-1, EN ISO 13849-1, FS, GL, GOST R, TUV 96.5mm - 22.5mm 114mm
RS庫存編號 122-2500
製造零件編號R1.188.0720.2
BrandWieland
HK$1,627.77
單位
24 V ac/dc 2 2 Elevator System, Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock 1 Monitored SafeRELAY - Screw CCC, CPT, CULus, DGUV, EN 62061, EN ISO 13849-1, GOST R 96.5mm - 22.5mm 114mm
RS庫存編號 780-5095
製造零件編號R1.188.3740.0 - SNO1012K-A
BrandWieland
HK$1,289.95
單位
24 V ac/dc 1 2 - - Manual SafeRELAY - Screw - - - - -
RS庫存編號 122-2499
製造零件編號R1.188.0620.0
BrandWieland
HK$2,399.10
單位
24 V dc 2 3 Elevator System, Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock - Monitored SafeRELAY - Screw CCC, CPT, CULus, EN 50156-1, EN 62061, EN ISO 13849-1, FS, GL, GOST R, TUV 96.5mm - 22.5mm 114mm
RS庫存編號 515-1759
製造零件編號R1.188.0500.1
BrandWieland
HK$1,416.88
單位
24 V ac/dc 2 3 Safety Switch/Interlock 1 Monitored SafeRELAY - Screw - 114mm - 99mm 22.5mm
RS庫存編號 321-9049
製造零件編號SNO 4062K-A-00C
BrandWieland
HK$1,361.39
單位
24 V ac/dc 2 2 Emergency Stop 1 - SafeRELAY - Screw - 114mm - 96.5mm 22.5mm
RS庫存編號 780-5082
製造零件編號R1.188.3590.0 - SNO4083KM-A
BrandWieland
HK$2,328.76
單位
115 → 230 V ac 2 3 - - Manual SafeRELAY - Screw - - - - -