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Safety Relays

Safety relays are essential devices in industrial systems. They monitor safety-related functions and ensure the reliable operation of safety devices like emergency stop buttons, light curtains, and switches. Their operation is simple but effective: when a fault is detected or a safety condition is not met, the relays interrupt power to the hazardous motion or energy source. That's a direct line to overall system safety—conformance with the many applicable requirements and standards that encompass the various parts of safety applications.

The main job of safety relays is to ensure that safety circuits do just that: control the logic and the safe functioning of a machine. The relay is given commands via input signals, which tell it when a safety function has been activated—like an emergency stop, for example. When that happens, the safety relay opens its internal contacts so that any outputs controlling machine motion (or any sort of energy) are now safely disabled. What makes safety relays unique is that they do all this with a very high level of reliability.

Found 371 items
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Found 371 items
Manufacturer
ABB (28)
Eaton (9)
IDEC (89)
Littelfuse (12)
Lovato (8)
Phoenix Contact (193)
Schneider Electric (27)
Weidmuller (5)
Component
Contact Module (1)
Coupling Relay (3)
Data Interface (1)
Extension Module (62)
Intrinsically Safe Devices (89)
Intrinsically Safe Relay (12)
Safety Module (17)
Safety Relay (177)
Safety Input Voltage
120 Volt (1)
230 Volt (2)
24 Volt (29)
Safety Relay Supply Voltage
24 Volt (146)
42 Volt (2)
48-240 Volt (14)
Relay Throws
2 NO (4)
Safety Relay Outputs
1 C/O (4)
1 NC (4)
2 NC (4)
2 NO (4)
2 NO + 1 NC (4)
3 NO (7)
3 NO + 1 NC (4)
4 NO (4)
Relay Connection Type
Screw Connection (5)
Safety Relay Additional Outputs
3 Pulsed Output (11)
4 Pulsed Output (4)
7 Pulsed Output (4)
Series
EB3C Relay Barrier (42)
EB3L Lamp Barrier (43)
EB3N Safety Relay Barrier (4)
Line
Preventa (27)
Relay Indication
Red LED (1)
Yellow LED (3)
Relay Mounting
Din Rail (16)
Coil Voltage Rating
100 VAC (37)
120 Volt (9)
24 VAC (2)
24 VDC (47)
240 VAC (37)
90-120 Volt (2)
Hazardous Location Rating
Class I Div 1 (89)
Safety Connection Method
Push-In Connection (77)
Screw Connection (98)
Spring-Cage Connection (2)
USB 2.0 Type C (2)
Safety Contact Type
1 Confirmation Current Path (11)
1 Delayed Confirmation Current Path (4)
1 Delayed Signaling Current Path (4)
1 Enabling Current Path (26)
1 Semiconductor Signaling Output (2)
1 Signaling Current Path (31)
1 Signaling Current Path (Type B According To EN 50205) (2)
2 Confirmation Current Paths (4)
2 Enabling Current Paths (35)
2 PDT (2)
Safety Degree of Protection
IP20 (178)
Safety Interfaces
Encoder (14)
Proximity Switches (16)
TBUS (54)
Safety Relay Connection Type
Screw Clamp Connection (14)
Spring Connection (13)
Safety Relay Safety Level
SIL Cat 1 (21)
SIL Cat 2 (5)
SIL Cat 3 (10)
SIL Cat 4 (105)
Normally In Stock
Phoenix Contact 2700499 Safety relays PSR-MC30-2NO-1DO-24DC-SP
Free U.S Ground shipping
$214.86
$179.05
Normally In Stock
Schneider Electric XPSUAF13AP Safety Relay For Industrial Applications
Free U.S Ground shipping
$330.12
$275.10
Normally In Stock
Phoenix Contact 2702192 Safety relays PSR-MS21-1NO-1DO-24DC-SC
Free U.S Ground shipping
$145.34
$121.12
Normally In Stock
Phoenix Contact 2700466 Safety relays PSR-MC20-3NO-1DO-24DC-SC
Free U.S Ground shipping
$202.21
$168.51
Normally In Stock
Phoenix Contact 2700581 Coupling relay PSR-PC32-2NO-1NC-24-230UC-SC
Free U.S Ground shipping
$278.05
$231.71
Normally In Stock
Phoenix Contact 1104981 Safety module PSR-M-B1-SDI8-SDO2-DO2-SC
Free U.S Ground shipping
$594.04
$495.03
Normally In Stock
Phoenix Contact 2700577 Coupling relay PSR-PC20-1NO-1NC-24DC-SC
Free U.S Ground shipping
$214.86
$179.05
Normally In Stock
Phoenix Contact 2904664 Coupling relay PSR-PC50-1NO-1DO-24DC-SC
Free U.S Ground shipping
$366.53
$305.44
Normally In Stock
Phoenix Contact 2702663 Coupling relay PSR-PS23-1NO-1NC-24VDC-SC
Free U.S Ground shipping
$202.21
$168.51
Normally In Stock
Phoenix Contact 2700356 Coupling relay PSR-PS20-1NO-1NC-24DC-SC
Free U.S Ground shipping
$202.21
$168.51
Normally In Stock
Phoenix Contact 2700357 Coupling relay PSR-PS21-1NO-1NC-24DC-SC
Free U.S Ground shipping
$176.94
$147.45
Normally In Stock
Phoenix Contact 2700588 Coupling relay PSR-PC40-2NO-1DO-24DC-SC
Free U.S Ground shipping
$227.50
$189.58
Normally In Stock
Phoenix Contact 2702524 Coupling relay PSR-PS22-1NO-1NC-24VDC-SC
Free U.S Ground shipping
$208.54
$173.78
Normally In Stock
Phoenix Contact 2700498 Safety relays PSR-MC30-2NO-1DO-24DC-SC
Free U.S Ground shipping
$214.86
$179.05
Normally In Stock
Phoenix Contact 2700540 Safety relays PSR-MC34-3NO-1DO-24DC-SC
Free U.S Ground shipping
$233.81
$194.84
Normally In Stock
Phoenix Contact 1104974 Safety module PSR-M-B2-SDI8-SDO4-DO4-SC
Free U.S Ground shipping
$757.06
$630.88
Normally In Stock
Phoenix Contact 2700589 Coupling relay PSR-PC40-2NO-1DO-24DC-SP
Free U.S Ground shipping
$227.50
$189.58
Normally In Stock
Phoenix Contact 2904952 Safety relays PSR-MS30-1NO-24DC-SC
Free U.S Ground shipping
$170.63
$142.19
Normally In Stock
Phoenix Contact 2963763 Safety relays PSR-SCP- 24UC/ESA4/3X1/1X2/B
Free U.S Ground shipping
$274.25
$228.54
Normally In Stock
Phoenix Contact 2700553 Safety relays PSR-MC50-3NO-1DO-24DC-SC
Free U.S Ground shipping
$233.81
$194.84
Normally In Stock
Phoenix Contact 2981059 Safety relays PSR-SCP- 24UC/ESL4/3X1/1X2/B
Free U.S Ground shipping
$300.80
$250.67
Normally In Stock
Schneider Electric XPSUDN13AP Safety Relay for Industrial Applications
Free U.S Ground shipping
$495.71
$413.09
Normally In Stock
Schneider Electric XPSUS32AP Safety Relay Features and Applications
Free U.S Ground shipping
$477.76
$398.13
Normally In Stock
Schneider Electric XPSUEP14AC Safety Relay for Extending Safety Contacts
Free U.S Ground shipping
$291.17
$242.64
Normally In Stock
Schneider Electric XPSUAT13A3AC Safety Relay for Various Industries
Free U.S Ground shipping
$637.81
$531.51
Normally In Stock
Schneider Electric XPSUAT13A3AP Safety Relay for Various Applications
Free U.S Ground shipping
$637.81
$531.51
Normally In Stock
Schneider Electric XPSUS32AC Safety Relay Module For Various Applications
Free U.S Ground shipping
$477.76
$398.13
Normally In Stock
Schneider Electric XPSUEP14AP Safety Relay Specifications
Free U.S Ground shipping
$291.17
$242.64
Normally In Stock
Schneider Electric XPSUEP34AC Safety Relay for Extended Safety Functions
Free U.S Ground shipping
$320.30
$266.92
Normally In Stock
Schneider Electric XPSUAT33A3AC Universal Safety Relay Solutions
Free U.S Ground shipping
$701.59
$584.66
Normally In Stock
Schneider Electric XPSUAT33A3AP Universal Safety Relay Description
Free U.S Ground shipping
$701.59
$584.66
Normally In Stock
Schneider Electric XPSUAF33AC Safety Relay Specifications Overview
Free U.S Ground shipping
$363.16
$302.63
Normally In Stock
Schneider Electric XPSUAF33AP Safety Relay for Industrial Applications
Free U.S Ground shipping
$363.16
$302.63
Normally In Stock
Schneider Electric XPSUAK12AC Safety Relay Module Design
Free U.S Ground shipping
$350.80
$292.33
Normally In Stock
Schneider Electric XPSUAK32AC Safety Relay for Multiple Safety Functions
Free U.S Ground shipping
$385.87
$321.56
Normally In Stock
Schneider Electric XPSUDN33AC Safety Relay Specifications Overview
Free U.S Ground shipping
$817.88
$681.57
Normally In Stock
Schneider Electric XPSUS12AC Safety Relay Specifications
Free U.S Ground shipping
$434.33
$361.94
Normally In Stock
Weidmuller 1303760000 Safety Relay
Free U.S Ground shipping
$368.88
$307.40
Normally In Stock
Schneider Electric XPSUS12AP Safety Relay Module for Industrial Control
Free U.S Ground shipping
$434.33
$361.94
Normally In Stock
Weidmuller 1303890000 Safety Relay
Free U.S Ground shipping
$234.74
$195.62
Normally In Stock
Weidmuller 1304040000 Safety Relay
Free U.S Ground shipping
$426.76
$355.63
Normally In Stock
Weidmuller 1319270000 Safety Relay
Free U.S Ground shipping
$398.60
$332.17
Normally In Stock
Weidmuller 1319280000 Safety Relay
Free U.S Ground shipping
$398.60
$332.17
Normally In Stock
IDEC EB3C-R01AN EB3C Relay Barrier, 100 VAC, 240 VAC
Free U.S Ground shipping
$321.25
$267.71
Normally In Stock
IDEC EB3C-R01DN EB3C Relay Barrier, 24 VDC
Free U.S Ground shipping
$321.25
$267.71
Normally In Stock
IDEC EB3C-R02AN EB3C Relay Barrier, 100 VAC, 240 VAC
Free U.S Ground shipping
$329.27
$274.39

More Information about Safety Relays

In more complex systems, safety relays may also include additional features such as contact extension, redundant channels, and fault diagnostics to meet higher safety requirements. These devices are designed to integrate seamlessly with existing machine control systems, providing safety functions like monitoring emergency stop circuits, safety gates, and other safety inputs. Their use helps meet the minimum safety requirements for machinery, reduce the risk of injury, and support safe operation across various industrial applications. With proper installation and monitoring, safety relays offer a critical layer of protection for both personnel and equipment in demanding plant environments.

FAQs

Do two hand controls on safety products perform in such a way that they are suitable for safety related applications?

Yes, two hand controls on safety products are designed to perform in such a way that they are suitable for safety-related applications by requiring simultaneous operation with both hands, reducing the risk of accidental activation and ensuring operator presence during hazardous machine functions.

Does the performance level of connected devices to safety relays have to perform in accordance with certain directives?

Yes, the performance level of devices connected to safety relays must perform in accordance with specific safety directives and standards, such as ISO 13849-1 or IEC 62061, to ensure compliance with required safety functions and risk reduction.

Safety Relays 

In the event of a hazard, safety relays can help reduce the risk to a more acceptable level. They are commonly designed to be used in conjunction with other safety relays to increase the functionality and safety levels in work environments. The design and functionality of these relays is similar to regular relays, with a few exceptions. Like a common relay, safety relays use contacts that can be opened or closed. However, they also have the ability to evaluate and then control outputs based on those evaluations. If installed correctly, a safety relay will continue to function if a fault in a device occurs or if a fault is caused by a sensor. The redundant design features of safety relays allow for wiring errors, while still providing proper safety function. 

It is very common to see safety relays being used around industrial machinery where safety is critical. Areas such as an industrial manufacturing plant environment, where there are a lot of motors, machinery and conveyors all operating simultaneously. Some of the devices that safety relays will be used with are emergency stops, three position devices, safety gates, pressure sensitive mats, contact strips, foot operated switches and time delay scenarios. Safety relays are tested much more vigorously than normal relays and have a much lower failure rate. The contacts are designed so that they can be completely disconnected, breaking both sides of the power connection as opposed to just one, like many normal relays.