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 324-7280
製造零件編號774325
BrandPilz
HK$1,555.15
單位
24 V ac/dc 1, 2 - Safety Switch/Interlock 2 PNOZ X - - Screw - 121mm - 87mm 22.5mm
RS庫存編號 156-106
製造零件編號750104
BrandPilz
HK$1,613.77
單位
24 V dc 2 1 Emergency Stop 3 PNOZsigma Automatic, Manual, Monitored - Screw - 120mm - 102mm 22.5mm
RS庫存編號 918-6649
製造零件編號777512
BrandPilz
HK$3,406.91
單位
24 V dc 2 2 Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock 3 PNOZ X Automatic, Manual - Screw - 121mm - 94mm 45mm
RS庫存編號 245-1854
製造零件編號774318
BrandPilz
HK$3,159.19
單位
24 V dc, 230 V ac 2 1 Emergency Stop 3 PNOZ X Automatic, Monitored - Screw - 121mm - 87mm 45mm
RS庫存編號 245-1860
製造零件編號774080
BrandPilz
HK$2,558.21
單位
24 V ac/dc 2 1 Safety Switch/Interlock 7 - Automatic, Manual, Monitored - Screw - 121mm - 87mm 90mm
RS庫存編號 245-1905
製造零件編號774500
BrandPilz
HK$3,011.49
單位
24 V dc 2 - Safety Switch/Interlock 2 PNOZ X Automatic, Manual, Monitored - Screw - 121mm - 87mm 45mm
RS庫存編號 245-1848
製造零件編號774310
BrandPilz
HK$1,990.79
單位
24 V ac/dc 2 1 Safety Switch/Interlock 3 PNOZ X Automatic, Monitored - Screw - 121mm - 87mm 45mm
RS庫存編號 918-6686
製造零件編號777301
BrandPilz
HK$2,198.08
單位
24 V ac/dc 2 1 Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock 3 PNOZ X Automatic, Manual - Screw - 121mm - 94mm 22.5mm
RS庫存編號 155-850
製造零件編號750126
BrandPilz
HK$2,452.93
單位
24 V dc 2 1 Two-Hand Control 3 PNOZsigma - - Screw - 120mm - 98mm 22.5mm
RS庫存編號 918-6645
製造零件編號777313
BrandPilz
HK$2,286.79
單位
24 → 240 V ac/dc 2 1 Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock 3 PNOZ X Automatic, Manual - Screw - 121mm - 94mm 45mm
RS庫存編號 156-083
製造零件編號750103
BrandPilz
HK$1,670.83
單位
24 V dc 2 - Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock 2 PNOZsigma Automatic, Manual, Monitored - Screw - 120mm - 102mm 17.5mm
RS庫存編號 239-1055
製造零件編號774306
BrandPilz
HK$1,504.17
單位
24 V ac/dc 2 - Safety Switch/Interlock 2 PNOZ X Automatic, Manual - Screw - 121mm - 87mm 22.5mm
RS庫存編號 191-9869
製造零件編號751167
BrandPilz
HK$1,224.52
單位
24 V dc 2 - Expansion Module 3 PNOZ s7.1 Automatic 4 Cage Clamp - 120mm - 98mm 17.5mm
RS庫存編號 156-099
製造零件編號750102
BrandPilz
HK$1,804.59
單位
24 V dc 1 1 Emergency Stop, Safety Switch/Interlock 3 PNOZsigma Automatic, Manual, Monitored - Screw - 120mm - 102mm 17.5mm
RS庫存編號 191-9864
製造零件編號751134
BrandPilz
HK$2,592.98
單位
48 → 240 V ac/dc 2 1 - 3 PNOZ s5 Automatic, Manual 4 Cage Clamp - 120mm - 98mm 22.5mm
RS庫存編號 191-9871
製造零件編號751184
BrandPilz
HK$2,393.88
單位
24 V dc 2 1 - 3 PNOZ s5 Automatic, Manual 4 Cage Clamp - 120mm - 98mm 22.5mm
RS庫存編號 362-0174
製造零件編號774350
BrandPilz
HK$3,683.48
單位
24 V dc 2 1 Two-Hand Control 2 PNOZ X Monitored - Screw - 121mm - 87mm 22.5mm
RS庫存編號 191-9873
製造零件編號751187
BrandPilz
HK$1,725.13
單位
24 V dc 2 1 Safety Switch 4 PNOZ s7 Automatic 4 Cage Clamp - 120mm - 98mm 17.5mm
RS庫存編號 239-1061
製造零件編號774314
BrandPilz
HK$2,000.24
單位
24 V dc, 110 V ac 2 1 Safety Switch/Interlock 3 PNOZ X Automatic, Monitored - Screw - 121mm - 87mm 45mm
RS庫存編號 191-9862
製造零件編號751126
BrandPilz
HK$2,008.52
單位
24 V dc 2 1 - 3 PNOZ s6.1 Automatic 1, 4 Cage Clamp - 120mm - 98mm 22.5mm