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.

...
Read more Read less

Filters

Viewing 221 - 240 of 408 products
Results per page
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 Stock No. 155-866
Mfr. Part No.750136
BrandPilz
$957.45
Each
units
48 → 240 V ac/dc 2 1 Two-Hand Control 3 PNOZsigma - - Screw - 120mm - 98mm 22.5mm
New
RS Stock No. 201-1473
Mfr. Part No.XPSUDN13AC
$554.00
Each
units
24 V ac/dc 1 8 Emergency Stop 5 - - - - - - - - -
New
RS Stock No. 201-1467
Mfr. Part No.XPSUAT33A3AC
$787.64
Each
units
24 V ac/dc 1 8 Emergency Stop 5 - - - - - - - - -
RS Stock No. 125-1100
Mfr. Part No.XPSPVK3484
$1,129.71
Each
units
24 V dc - - Emergency Stop, Safety Switch/Interlock 2 Preventa Manual PLe Category 4, SIL CL3 Screw CSA, TUV, UL - - - -
RS Stock No. 733-2341
Mfr. Part No.2TLA010026R0000
BrandABB
$594.84
Each
units
24 V dc 1, 2 - Light Beam/Curtain, Safety Mat/Edge, Safety Switch/Interlock 4 - - - Terminal Block - 120mm - 84mm 45mm
New
RS Stock No. 201-6856
Mfr. Part No.2903253
$653.75
Each
units
24 V dc 4 None Emergency Stop, Safety Switch 3 - - - - - - - - -
RS Stock No. 757-9308
Mfr. Part No.G9SB-3012-C AC/DC24
BrandOmron
$316.80
Each
units
24 V ac/dc 2 1 Emergency Stop 3 - - - - - 112mm - 100mm 23mm
RS Stock No. 177-9024
Mfr. Part No.SCR ON4-W22-3.6-S
$336.96
Each
units
24 V dc, 230 V ac 1 3 Two-Hand Control - - - - Screw - 114.5mm - 22.5mm 99mm
RS Stock No. 177-9020
Mfr. Part No.SCR4-W22-3.5-SD
$258.57
Each
units
24 V dc, 230 V ac 1 3NO/NC Two-Hand Control - - - - Screw - 114.5mm - 22.5mm 99mm
RS Stock No. 656-6130
Mfr. Part No.LG5933.48 DC24V
BrandDold
$519.40
Each
units
24 V ac/dc - 1 Two-Hand Control 3 Safemaster Monitored - Screw - 121mm - 90mm 22.5mm
RS Stock No. 191-9861
Mfr. Part No.751110
BrandPilz
$448.66
Each
units
24 V dc 2 1 Safety Switch 4 PNOZ s10 Automatic 4 Cage Clamp - 120mm - 98mm 45mm
RS Stock No. 731-8967
Mfr. Part No.XPSBCE3710C
$1,733.82
Each
units
230 V ac - 1 Two-Hand Control 2 Preventa - - Cage Clamp - 114mm - 111mm 22.5mm
RS Stock No. 122-2495
Mfr. Part No.R1.188.1460.0
BrandWieland
$383.97
Each
units
230 V ac 2 1 Elevator System, Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock 3 SafeRELAY Manual, Monitored - 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 Stock No. 183-7201
Mfr. Part No.3SK2122-2AA10
BrandSiemens
$1,467.66
Each
units
24 V dc 4 - - - SIRIUS - PLe, SIL 3 Push In - 100mm - 45mm 124.5mm
RS Stock No. 794-8814
Mfr. Part No.G7SA-5A1B DC24
BrandOmron
$88.70
Each
units
12 → 48 V dc 2 1 - 1 - Manual - PCB Pin - 24mm - 50mm 13mm
RS Stock No. 177-4032
Mfr. Part No.2702097
$386.07
Each
units
24 V dc 2 - Emergency Stop 2 - Manual 1 Terminal Block DIN EN 50178 114.5mm - 116.6mm 12.5mm
RS Stock No. 666-7047
Mfr. Part No.2963750
$355.39
Each
units
24 V ac/dc 2 1 Emergency Stop, Safety Switch/Interlock 2 - - 3 Screw - 114.5mm - 99mm 22.5mm
RS Stock No. 125-1104
Mfr. Part No.XPSVC1132P
$1,260.07
Each
units
24 V dc - - Safety Switch/Interlock - Preventa Manual PLe Category 4, SIL CL3 Screw BIA, CSA, DIN V VDE 801 + A1, EN/IEC 60204-1, EN/IEC 60947-1 + A1, EN/IEC 60947-5-1, UL 114mm - 22.5mm 99mm
RS Stock No. 191-9865
Mfr. Part No.751135
BrandPilz
$626.42
Each
units
48 → 240 V ac/dc 2 - - 2 PNOZ s5 Automatic, Manual 4 Cage Clamp - 120mm - 98mm 22.5mm
RS Stock No. 780-5082
Mfr. Part No.R1.188.3590.0 - SNO4083KM-A
BrandWieland
$449.98
Each
units
115 → 230 V ac 2 - - 3 SafeRELAY Manual - Screw - - - - -
Related Products
Detects the stop condition of all types of ...
Description:
Detects the stop condition of all types of AC or DC motor driven machines which, when the motor runs down, produce a residual voltage in the windings. No additional sensor is required1 N/O and 1 N/C contacts, EN954-1 Category 3 ...
LED indication for supply voltage and safety circuits. ...
Description:
LED indication for supply voltage and safety circuits. Automatic restart function available. Contact current rating: 6A Conform to BS EN 60204 Part 1 1993; EN 954-1; IEC 204-1; VDE 0113 Dimensions (mm): H 96.5, W 22.5, L 114.
The PNOZ X3 range of Safety Relays by ...
Description:
The PNOZ X3 range of Safety Relays by PILZ introduces your circuit to a safety related interruption wherein the primary applications are typically in potential hazardous environments where you need that quick power cut off. Particularly useful in automated environments ...
Single or dual channel cabling with short-circuit detection. ...
Description:
Single or dual channel cabling with short-circuit detection. Choice of self-monitoring or automatic reset. Display LEDs for status of channels 1 and 2, input circuits, power supply voltage and reset. Return loop for monitoring external contactors2 solid state outputs.