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 155-939
Référence fabricant750101
MarquePilz
122,30 €
Each
Unité
24 V dc 1 - Emergency Stop, Safety Switch/Interlock - - - 2 PNOZsigma Automatic, Manual - Screw - -
N° de stock RS 464-491
Référence fabricantXPSATE5110P
321,48 €
Each
Unité
24 V dc 2 4 Emergency Stop, Safety Mat/Edge, Safety Switch/Interlock - - - 2 Preventa Automatic, Manual - Screw - -
N° de stock RS 122-2493
Référence fabricantR1.188.1840.0
MarqueWieland
216,98 €
Each
Unité
230 V ac 2 1 Elevator System, Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock - - - 3 safeRELAY Manual - Screw CCC, CPT, cULus, EN 50156-1, EN 61511, EN 62061, EN 81-1, EN ISO 13849-1, FS, GL, GOST R, TUV -
N° de stock RS 757-9310
Référence fabricantG9SA-321-T075 AC/DC24
MarqueOmron
314,42 €
Each
Unité
24 V ac/dc 2 1 Emergency Stop - - - 3 - - - - - -
N° de stock RS 814-6927
Référence fabricantXPSAC5121P
155,16 €
Each
Unité
24 V ac/dc 1 1 Emergency Stop, Safety Switch/Interlock - - - 3 Preventa Monitored - Screw - -
N° de stock RS 890-3386
Référence fabricantG9SE-221-T05-DC24
MarqueOmron
162,71 €
Each
Unité
24 V dc 2 1 Emergency Stop - - - 2 - Automatic, Manual - Screw CAN C22.2 No.14, CSA C22.2 No.14, EN 62061 SIL3, EN 81-1, EN 81-2, EN ISO 13849-1: 2008 PL e Safety Category 4, EN/IEC 60947-5-1, GB 14048.5, IEC 62061 SIL 3, UL508 -
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 757-9317
Référence fabricantG9SA-301 AC100-240
MarqueOmron
259,34 €
Each
Unité
100 → 240 V ac 2 1 Emergency Stop - - - 1 - - - - - -
N° de stock RS 464-495
Référence fabricantXPSATE3710P
380,00 €
Each
Unité
230 V ac 2 4 Emergency Stop, Safety Mat/Edge, Safety Switch/Interlock - - - 2 Preventa Automatic, Manual - Screw - -
N° de stock RS 814-6921
Référence fabricantXPSAFL5130P
183,06 €
Each
Unité
24 V ac/dc 2 - Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock - - - 3 Preventa 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 893-7711
Référence fabricant2904950
88,13 €
Each
Unité
24 V dc 1 1 Emergency Stop, Safety Switch/Interlock - - - 1 PSRmini Automatic 1 Screw cUL, cULus, EAC, Functional Safety, UL -
N° de stock RS 240-8692
Référence fabricantBD5935.48 DC24V
MarqueDold
315,33 €
Each
Unité
24 V dc 1, 2 - Emergency Stop - - - 4 Safemaster - - Screw - -
N° de stock RS 155-850
Référence fabricant750126
MarquePilz
194,50 €
Each
Unité
24 V dc 2 1 Two-Hand Control - - - 3 PNOZsigma - - 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 860-3773
Référence fabricantG9SR-BC201-RC
MarqueOmron
138,25 €
Each
Unité
24 V dc 2 - Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock - - - - - - - Cage Clamp - -
N° de stock RS 447-4483
Référence fabricantXPSAC3421
147,69 €
Each
Unité
115 V ac - 1 Emergency Stop - - - 3 Preventa - - Screw - -
N° de stock RS 656-6089
Référence fabricantLG5924.02/61 AC50/60Hz 230V
MarqueDold
155,00 €
Each
Unité
230 V ac 1 - Emergency Stop - - - 2 Safemaster - - Terminal Block - -
N° de stock RS 712-5260
Référence fabricant2986960
117,59 €
Each
Unité
24 V dc - - - - - - 3 - - 3 Screw - -
N° de stock RS 447-4528
Référence fabricantXPSAR371144
365,49 €
Each
Unité
24 V dc, 240 V ac 1, 2 2 Light Beam/Curtain - - - 7 Preventa - - Screw - -