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 Series
RS Stock No. 177-4036
Mfr. Part No.2700575
$447.79
Each
units
24 V dc 2 - Two Hand Control 2 - Manual 1 Terminal Block - 114.5mm - 116.6mm -
RS Stock No. 893-7705
Mfr. Part No.2700570
$354.55
Each
units
24 V dc 2 3 Emergency Stop, Safety Switch/Interlock 3 PSRmini Automatic, Manual 4 Cage Clamp cUL, cULus, EAC, Functional Safety, UL 114.5mm - 116.6mm -
RS Stock No. 893-7698
Mfr. Part No.2700540
$241.24
Each
units
24 V dc 2 3 Emergency Stop, Safety Switch/Interlock 3 PSRmini Automatic, Manual 3 Screw cUL, cULus, EAC, Functional Safety, UL 114.5mm - 112.2mm -
RS Stock No. 780-5091
Mfr. Part No.R1.188.3710.0 - SNZ1022K-A
BrandWieland
$215.82
Each
units
115 → 230 V ac 2 - - 2 safeRELAY - - Screw - - - - -
RS Stock No. 125-1100
Mfr. Part No.XPSPVK3484
$1,065.01
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. 712-5263
Mfr. Part No.2986575
$281.15
Each
units
24 V dc - - - 3 - - - Screw - 114.5mm - 99mm -
RS Stock No. 123-2740
Mfr. Part No.280003-P
BrandIDEM
$313.66
Each
units
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 99mm - 22.5mm -
RS Stock No. 378-5388
Mfr. Part No.774435
BrandPilz
$767.89
Each
units
115 V ac 2 1 Two-Hand Control 3 PNOZ X Manual - Screw - 121mm - 101mm -
RS Stock No. 784-5825
Mfr. Part No.3SK1121-2CB44
BrandSiemens
$780.91
Each
units
24 V dc 1 - - 4 SIRIUS Automatic, Monitored - Cage Clamp - 121.7mm - 100mm -
RS Stock No. 784-5784
Mfr. Part No.3SK1111-1AW20
BrandSiemens
$474.86
Each
units
110 → 240 V ac/dc 1 - - 4 SIRIUS Automatic, Monitored - Screw - 121.7mm - 100mm -
RS Stock No. 156-112
Mfr. Part No.750134
BrandPilz
$696.66
Each
units
48 → 240 V ac/dc 2 1 Emergency Stop, Light Beam/Curtain, Safety Switch/Interlock 3 PNOZsigma Automatic, Manual, Monitored - Screw - 120mm - 102mm -
RS Stock No. 698-8694
Mfr. Part No.SRB101EXI-1R
BrandSchmersal
$1,360.39
Each
units
24 V dc 2 1 Safety Switch/Interlock 1 PROTECT Monitored - Screw - 121mm ATEX 100mm -
RS Stock No. 447-4461
Mfr. Part No.XPSMP11123
$858.71
Each
units
24 V dc 1 3 Safety Mat/Edge, Safety Switch/Interlock 6 Preventa Automatic, Monitored - - - 114mm - 99mm -
RS Stock No. 176-0029
Mfr. Part No.2TLA010052R0400
BrandABB Jokab
$480.03
Each
units
24 V dc 3 4 Safety Switch 4 Sentry Multi-Reset 4 Screw - 120mm - 22.5mm -
RS Stock No. 123-2744
Mfr. Part No.280002
BrandIDEM
$189.70
Each
units
24 V ac/dc 2 1 Emergency Stop, Safety Switch/Interlock 3 Viper Automatic, Manual - Screw cULus, EN 60204-1, EN 62061, EN ISO 12100, EN ISO 13849-1, EN ISO 13849-2, TUV, UL 508 99mm - 22.5mm -
RS Stock No. 784-5780
Mfr. Part No.3SK1111-1AB30
BrandSiemens
$543.46
Each
units
24 V ac/dc 1 - - 4 SIRIUS Automatic, Monitored - Screw - 121.7mm - 100mm -
RS Stock No. 177-9022
Mfr. Part No.SCR2-W22-2.5-S
$240.95
Each
units
24 V dc, 230 V ac 1 2 Two-Hand Control - - - - Screw - - - - -
RS Stock No. 360-4352
Mfr. Part No.XPSAF5130P
$354.28
Each
units
24 V ac/dc 1, 2 - Safety Switch/Interlock 3 Preventa - - Screw - 114mm - 99mm -
RS Stock No. 712-5250
Mfr. Part No.2900509
$367.21
Each
units
24 V ac/dc 1, 2 1 Safety Switch/Interlock 3 - - 3 Screw - 114.5mm - 99mm -
RS Stock No. 177-4035
Mfr. Part No.2700572
$384.59
Each
units
24 V dc 1 - Two Hand Control 2 - Manual 1 Terminal Block - 114.5mm - 116.6mm -
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