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 801-5943
Référence fabricant2981062
166,33 €
Each
Unité
24 V ac/dc 2 - Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock - - - 4 - Automatic, Manual 3 Cage Clamp - -
N° de stock RS 191-9859
Référence fabricant751109
MarquePilz
181,02 €
Each
Unité
24 V dc 2 1 Safety Switch - - - 3 PNOZ s9 Manual 4 Cage Clamp - -
N° de stock RS 177-9019
Référence fabricantSCR4-W22-3.5-D
MarqueBernstein AG
145,52 €
Each
Unité
24 V dc, 230 V ac 1 3NO/NC Two-Hand Control - - - - - - - Screw - -
N° de stock RS 190-8414
Référence fabricant2702902
289,20 €
Each
Unité
24 V dc 2 - - - - - 2 - Automatic, Manual, Monitored PLe Category 4, SILCL 3 Plug-In - -
N° de stock RS 447-4534
Référence fabricantXPSDMB1132
209,97 €
Each
Unité
24 V dc 1, 2 2 Safety Switch/Interlock - - - 2 Preventa - 4 Screw - -
N° de stock RS 191-9866
Référence fabricant751136
MarquePilz
356,05 €
Each
Unité
48 → 240 V ac/dc 2 1 - - - - 3 PNOZ s6 Monitored 4 Screw - -
N° de stock RS 123-2740
Référence fabricant280003-P
MarqueIDEM
198,66 €
Each
Unité
24 V ac/dc 2 1 Emergency Stop - - - 3 Viper Automatic - Plug In cULus, EN 60204-1, EN 62061, EN ISO 12100, EN ISO 13849-1, EN ISO 13849-2, TUV, UL 508 -
N° de stock RS 741-8669
Référence fabricantSRB202CA/QT 24VDC
MarqueSchmersal
421,03 €
Each
Unité
24 V dc 2 - Safety Switch/Interlock - - - - PROTECT - - Screw - -
N° de stock RS 271-518
Référence fabricantUE403-A0930
MarqueSick
333,00 €
Each
Unité
- - - - - - - - - - - - - -
N° de stock RS 200-6133
Référence fabricantXPSUAF13AP
206,67 €
Each
Unité
24 V 2 4 Emergency Stop - - - 3 Preventa - PLe Category 4, SIL CL3 Screw FS, CE, RoHS, REACH, Green Premium, cULus, RCM, CCC, S-Mark, K-Mark, EAC -
N° de stock RS 201-1493
Référence fabricantXPSUEP14AC
153,68 €
Each
Unité
24 V ac/dc 1 4 Emergency Stop Monitoring - - - 5 Preventa - PLe Category 4, SIL CL3 Spring FS, CE, RoHS, REACH, Green Premium, cULus, RCM, CCC, S-Mark, K-Mark, EAC -
N° de stock RS 193-0520
Référence fabricant440R-B23020
255,00 €
Each
Unité
24 V ac/dc 1 1 Safety Switch/Interlock - - - 3 Minotaur Automatic, Manual, Monitored - Screw - -
N° de stock RS 814-6915
Référence fabricantXPSAV11113P
419,04 €
Each
Unité
24 V dc 2 3 Emergency Stop, Safety Switch/Interlock - - - 6 Preventa Automatic, Monitored - Screw - -
N° de stock RS 707-9983
Référence fabricantXPSVNE3442P
451,62 €
Each
Unité
115 V 2 2 Speed/Standstill Monitoring - - - 2 Preventa - - Screw - -
N° de stock RS 184-0136
Référence fabricant3SK29412AA10
MarqueSiemens
347,74 €
Each
Unité
- 2 - - - - - - SIRIUS - 4, PLe 3, SIL 3 Plug In - -
N° de stock RS 2509665394
Référence fabricantES-UA-5A
282,11 €
Each
Unité
- - - - - - - - - - - - - -
N° de stock RS 2509667665
Référence fabricantGM-FA-10J
305,72 €
Each
Unité
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