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 Prix Supply Voltage Number of Channels Auxiliary Contacts Function Safety Category ISO 13849-1 SIL IEC 61508 PL ISO 13849-1 Safety Contacts Range Reset Method Safety Category Terminal Type Standards Met Configurable
N° de stock RS 245-1848
Référence fabricant774310
MarquePilz
193,90 €
Each
Unité
24 V ac/dc 2 1 Safety Switch/Interlock - - - 3 PNOZ X Automatic, Monitored - Screw - -
N° de stock RS 239-1055
Référence fabricant774306
MarquePilz
144,40 €
Each
Unité
24 V ac/dc 2 - Safety Switch/Interlock - - - 2 PNOZ X Automatic, Manual - Screw - -
N° de stock RS 239-1033
Référence fabricant774300
MarquePilz
143,30 €
Each
Unité
24 V ac/dc 1 1 Safety Switch/Interlock - - - 3 PNOZ X Automatic, Manual - Screw - -
N° de stock RS 245-1905
Référence fabricant774500
MarquePilz
289,10 €
Each
Unité
24 V dc 2 - Safety Switch/Interlock - - - 2 PNOZ X Automatic, Manual, Monitored - Screw - -
N° de stock RS 324-7274
Référence fabricant774059
MarquePilz
120,40 €
Each
Unité
24 V ac/dc 1 - Safety Switch/Interlock - - - 2 PNOZ X - - Screw - -
N° de stock RS 245-1854
Référence fabricant774318
MarquePilz
193,90 €
Each
Unité
24 V dc, 230 V ac 2 1 Emergency Stop - - - 3 PNOZ X Automatic, Monitored - Screw - -
N° de stock RS 324-7268
Référence fabricant774056
MarquePilz
120,40 €
Each
Unité
230 V ac 1 - Safety Switch/Interlock - - - 2 PNOZ X - - Screw - -
N° de stock RS 362-0168
Référence fabricant774585
MarquePilz
122,80 €
Each
Unité
24 V dc 1 - Expansion Module - - - 4 PNOZ X Automatic - Screw - -
N° de stock RS 245-1955
Référence fabricant774150
MarquePilz
227,20 €
Each
Unité
24 V dc 2 1 Expansion Module - - - 8 PNOZ X - - Screw - -
N° de stock RS 489-6350
Référence fabricant777302
MarquePilz
170,90 €
Each
Unité
24 → 240 V ac/dc 1, 2 1 Safety Switch/Interlock - - - 3 PNOZ X - - Screw - -
N° de stock RS 362-0174
Référence fabricant774350
MarquePilz
375,26 €
Each
Unité
24 V dc 2 1 Two-Hand Control - - - 2 PNOZ X Monitored - Screw - -
N° de stock RS 489-6388
Référence fabricant777606
MarquePilz
408,30 €
Each
Unité
24 → 240 V ac/dc 1, 2 2 Safety Switch/Interlock - - - 7 PNOZ X - - Screw - -
N° de stock RS 239-1049
Référence fabricant774303
MarquePilz
144,40 €
Each
Unité
24 V ac/dc 2 - Light Beam/Curtain, Safety Switch/Interlock - - - 2 PNOZ X Manual - Screw - -
N° de stock RS 918-6649
Référence fabricant777512
MarquePilz
367,23 €
Each
Unité
24 V dc 2 2 Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock - - - 3 PNOZ X Automatic, Manual - Screw - -
N° de stock RS 324-7280
Référence fabricant774325
MarquePilz
151,40 €
Each
Unité
24 V ac/dc 1, 2 - Safety Switch/Interlock - - - 2 PNOZ X - - Screw - -
N° de stock RS 239-1061
Référence fabricant774314
MarquePilz
193,90 €
Each
Unité
24 V dc, 110 V ac 2 1 Safety Switch/Interlock - - - 3 PNOZ X Automatic, Monitored - Screw - -
N° de stock RS 489-6394
Référence fabricant777949
MarquePilz
430,00 €
Each
Unité
24 → 240 V ac/dc 1, 2 1 Speed/Standstill Monitoring - - - 2 PNOZ X - - Screw - -
N° de stock RS 362-0152
Référence fabricant774709
MarquePilz
363,60 €
Each
Unité
24 V dc 1, 2 4 Safety Switch/Interlock - - - 6 PNOZ X - - Screw - -
N° de stock RS 178-2438
Référence fabricant775600
MarquePilz
247,80 €
Each
Unité
24 V ac 2 1 Emergency Stop - - - 3 PNOZ X Automatic, Manual - Screw - -
N° de stock RS 918-6677
Référence fabricant774502
MarquePilz
354,76 €
Each
Unité
24 V dc 2 2 Emergency Stop, Safety Switch/Interlock - - - 2 PNOZ X Automatic, Manual - Screw - -