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. 122-2495
Mfr. Part No.R1.188.1460.0
BrandWieland
$299.46
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 -
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. 239-1061
Mfr. Part No.774314
BrandPilz
$597.21
Each
units
24 V dc, 110 V ac 2 1 Safety Switch/Interlock 3 PNOZ X Automatic, Monitored - Screw - 121mm - 87mm -
RS Stock No. 741-8666
Mfr. Part No.SRB324ST 24V (V.3)
BrandSchmersal
$1,010.44
Each
units
24 V ac/dc 1, 2 - Light Beam/Curtain, Safety Switch/Interlock - PROTECT - - Screw - 121mm - 100mm -
RS Stock No. 155-844
Mfr. Part No.750106
BrandPilz
$786.49
Each
units
24 V dc 2 1 Two-Hand Control 3 PNOZsigma - - Screw - 120mm - 98mm -
RS Stock No. 125-1096
Mfr. Part No.XPSAR371144P
$1,001.82
Each
units
24 V dc, 230 V ac 2 2 Emergency Stop 7 Preventa Manual PLe Category 4, SIL CL3 Screw CSA, EN/IEC 60204-1, EN/IEC 60947-5-1, TUV, UL 114mm - 90mm -
RS Stock No. 857-7536
Mfr. Part No.NES13DB24SA
$549.04
Each
units
24 V ac/dc - - - - - - - - - 99mm - 22.5mm -
RS Stock No. 447-4512
Mfr. Part No.XPSAR351144
$930.26
Each
units
115 V ac 1, 2 2 Light Beam/Curtain 7 Preventa - - - - 114mm - 99mm -
RS Stock No. 489-6388
Mfr. Part No.777606
BrandPilz
$918.50
Each
units
24 240 V ac/dc 1, 2 2 Safety Switch/Interlock 7 PNOZ X - - Screw - 121mm - 94mm -
RS Stock No. 731-8951
Mfr. Part No.XPSBCE3110P
$548.62
Each
units
24 V ac/dc - 1 Two-Hand Control 2 Preventa - - Screw - 114mm - 99mm -
RS Stock No. 177-4038
Mfr. Part No.2702383
$305.54
Each
units
24 V dc 2 - Emergency Stop 5 - Manual 1 Terminal Block - 114.5mm - 116.6mm -
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 -
RS Stock No. 382-2049
Mfr. Part No.011-149
BrandSmartscan
$175.19
Each
units
24 V dc 2 1 Light Beam/Curtain 2 - Automatic, Manual - - - 60mm - 90mm -
RS Stock No. 549-570
Mfr. Part No.G9SB200DACDC24
BrandOmron
$413.93
Each
units
24 V ac/dc 2 - Emergency Stop 2 - Manual - - - 112mm - 100mm -
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. 125-1101
Mfr. Part No.XPSPVT1180
$1,501.24
Each
units
24 V dc - - Emergency Stop, Safety Switch/Interlock 3 Preventa Manual PLe Category 4, SIL CL3 Screw CSA, TUV, UL - - - -
RS Stock No. 893-7688
Mfr. Part No.2700466
$205.19
Each
units
24 V dc 1 3 Emergency Stop, Safety Switch/Interlock 3 PSRmini Automatic, Manual 1 Screw cUL, cULus, EAC, Functional Safety, UL 114.5mm - 112.2mm -
RS Stock No. 814-6952
Mfr. Part No.XPSAC3721P
$375.70
Each
units
230 V ac 1 1 Emergency Stop, Safety Switch/Interlock 3 Preventa Monitored - Screw - 114mm - 99mm -
RS Stock No. 177-4033
Mfr. Part No.2702192
$186.65
Each
units
24 V dc 1 - - 1 - Manual 1 Terminal Block - 102.5mm - 93.1mm -
RS Stock No. 712-5279
Mfr. Part No.2986957
$350.61
Each
units
24 V dc - - - 3 - - 3 Cage Clamp - 114.5mm - 112mm -
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