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Safety Relays with Diagnostic Capabilities
Control and diagnose issues with safety-critical circuits. These relays have a microprocessor that monitors safety components, such as emergency stops and light curtains, and sends a signal to stop the operation if a failure is detected and restart when the issue is resolved. They also help with diagnostic tasks because of their feedback circuit, which allows basic relays to communicate their status back to the safety relay. These relays have a duplicate set of input and output signals, so they’ll still stop the controlled device if one of the inputs fails.
IP20 rated, they have recessed terminals which prevent fingers and other objects from touching live circuits. These relays have been tested to multiple safety standards and can help achieve PL, SIL, or CAT system ratings. They also meet ISO and IEC standards for machine safety.
Mount them to 35 mm DIN rail (also known as DIN 3 Rail) for fast installation.
Relays and auxiliary contact blocks with delayed safety outputs are often used where power must be maintained after an input signal is received. For example, after a stop button for a machine is pressed, the guard door will stay locked until the machine cycle is finished.
Auxiliary contact blocks (sold separately) allow you to control more components, such as signaling devices or basic relays.
For technical drawings and 3-D models, click on a part number.
| Number of Terminals | Input Voltage | Switching Current @ Voltage | Max. Switching Voltage | Ht. | Wd. | Dp. | For Use With | Max. System Safety Rating | Features | Each | |
2 Circuits Controlled | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
2 Off (Normally Open) | |||||||||||
| 14 | 24V DC | 2 A @ 240 V AC 1.5 A @ 24 V DC | 250V AC | 4.9" | 0.69" | 4.3" | Emergency Stops, Light Curtains | PLe, SIL3, CAT 4, 250V | Auxiliary PNP Output, LED Indicator | 0000000 | 0000000 |
2 Safety Outputs with 2 Off (Normally Open) and 2 Delayed Safety Outputs with 2 Off (Normally Open) | |||||||||||
| 16 | 24V DC | 3 A @ 240 V AC 3 A @ 24 V DC | 250V AC 250V DC | 3.9" | 0.9" | 4.5" | Emergency Stops, Light Curtains | PLe, SIL3 | Time Delay | 0000000 | 000000 |
2 Safety Outputs with 2 Off (Normally Open) and 1 Signal Output with 2 On (Normally Closed) | |||||||||||
| 16 | 24V AC, 24V DC | 5 A @ 240 V AC 5 A @ 24 V DC | 250V AC 250V DC | 3.9" | 0.9" | 4.5" | Emergency Stops | PLe, SIL3 | __ | 0000000 | 000000 |
| 16 | 24V AC, 24V DC | 5 A @ 240 V AC 5 A @ 24 V DC | 250V AC 250V DC | 3.9" | 0.9" | 4.5" | Two-Hand Switches | PLe, SIL3 | __ | 0000000 | 000000 |
3 Safety Outputs with 2 Off (Normally Open) and 1 Signal Output with 2 On (Normally Closed) | |||||||||||
| 16 | 240V AC | 3 A @ 240 V AC 2.5 A @ 24 V DC | 250V AC 250V DC | 3.9" | 1.8" | 4.5" | Emergency Stops | PLe, SIL3 | __ | 0000000 | 000000 |
| 24 | 24V AC, 48V AC, 120V AC, 240V AC, 24V DC, 48V DC, 60V DC, 120V DC, 240V DC | 5 A @ 240 V AC 5 A @ 24 V DC | 250V AC 250V DC | 4.42" | 0.9" | 4.5" | Emergency Stops | PLe, SIL3 | __ | 0000000 | 00000000 |
3 Circuits Controlled | |||||||||||
3 Safety Outputs with 3 Off (Normally Open) | |||||||||||
| 6 | 24V DC | 6 A @ 240 V AC 6 A @ 24 V DC | 240V AC | 3.7" | 0.9" | 4.8" | Light Curtains | PLe, SIL3 | Auxiliary PNP Output, Self-Monitoring Circuitry | 0000000 | 000000 |
3 Safety Outputs with 2 Off (Normally Open) and 1 Signal Output with 2 On (Normally Closed) | |||||||||||
| 16 | 24V AC, 24V DC | 5 A @ 240 V AC 5 A @ 24 V DC | 250V AC 250V DC | 3.9" | 0.9" | 4.5" | Emergency Stops | PLe, SIL3 | __ | 0000000 | 000000 |
4 Circuits Controlled | |||||||||||
4 Off (Normally Open) | |||||||||||
| 18 | 24V DC | 2 A @ 240 V AC 1.5 A @ 24 V DC | 250V AC | 4.9" | 0.89" | 4.3" | Emergency Stops, Light Curtains | PLe, SIL3, CAT 4, 250V | Auxiliary PNP Output, LED Indicator | 0000000 | 000000 |
| Number of Terminals | Input Voltage  | Switching Current @ Voltage | Max. Switching Voltage | Ht. | Wd. | Dp. | Features | Each | |
5 Safety Outputs | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 16 | 24V AC, 24V DC | 2.5 A @ 24 V DC 3 A @ 240 V AC | 250V AC, 250V DC | 3.9" | 0.9" | 4.5" | __ | 0000000 | 0000000 |
4 Delayed Safety Outputs | |||||||||
| 16 | 24V DC | 3 A @ 240 V AC 3 A @ 24 V DC | 250V AC, 250V DC | 3.9" | 0.9" | 4.5" | Time Delay | 0000000 | 000000 |
Safety Relays
Receive signals from safety monitoring relays or controllers to switch devices off and on because of a system failure. When a failure is detected, the self-monitoring circuitry signals the controller to remove power and prevent restarting until the issue is resolved. An inspection window allows you to easily see the status of your system.
These relays have nondetachable auxiliary contacts, so they won’t separate from the relay if there is shock or vibration. Also known as force-guided or mechanically linked contacts, their interlocking opposing auxiliary contacts cannot be open or closed at the same time. They have mirror auxiliary contacts, which are normally closed and cannot be open at the same time as a normally open main contact. To keep your system from receiving false switching signals, the interlocking opposing auxiliary contact must remain open even if a contact welds closed.
IP20 rated, they have recessed terminals which prevent fingers and other objects from touching live circuits. These relays have been tested to multiple safety standards and can help achieve PL, SIL, and CAT system ratings. They also meet ISO and IEC standards for machine safety.
Mount them to 35mm DIN rail (also known as DIN 3 Rail). They can also be mounted to flat surfaces.
For technical drawings and 3-D models, click on a part number.
hp @ Switching Voltage | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of Terminals | Input Voltage | Control Current, A | Switching Current @ 600V AC | Max. Switching Voltage | Single Phase | Three Phase | Auxiliary Contact Switch Starting Position (No. of Contacts) | Ht. | Wd. | Dp. | Max. System Safety Rating | Each | |
3 Circuits Controlled with 3 Off (Normally Open) or 3 On (Normally Closed)—3PST | |||||||||||||
| 18 | 120V AC | 7 | 20A | 600V AC | 1/4 hp @ 120 V AC 1 hp @ 240 V AC | 2 hp @ 240 V AC 3 hp @ 480 V AC 5 hp @ 600 V AC | 1 Off (Normally Open) (2) 1 On (Normally Closed) (3) | 2.68" | 1.77" | 4.6" | PLe, SIL3, CAT 4, 600V | 0000000 | 0000000 |
| 18 | 120V AC | 9 | 20A | 600V AC | 1/2 hp @ 120 V AC 1 1/2 hp @ 240 V AC | 3 hp @ 240 V AC 5 hp @ 480 V AC 7 1/2 hp @ 600 V AC | 1 Off (Normally Open) (2) 1 On (Normally Closed) (3) | 2.68" | 1.77" | 4.6" | PLe, SIL3, CAT 4, 600V | 0000000 | 000000 |
| 18 | 120V AC | 12 | 20A | 600V AC | 1 hp @ 120 V AC 2 hp @ 240 V AC | 3 hp @ 240 V AC 10 hp @ 480 V AC 10 hp @ 600 V AC | 1 Off (Normally Open) (2) 1 On (Normally Closed) (3) | 2.68" | 1.77" | 4.6" | PLe, SIL3, CAT 4, 600V | 0000000 | 000000 |
| 18 | 120V AC | 18 | 40A | 600V AC | 2 hp @ 120 V AC 3 hp @ 240 V AC | 5 hp @ 240 V AC 10 hp @ 480 V AC 15 hp @ 600 V AC | 1 Off (Normally Open) (2) 1 On (Normally Closed) (3) | 3.35" | 1.77" | 5.5" | PLe, SIL3, CAT 4, 600V | 0000000 | 000000 |
| 18 | 120V AC | 25 | 40A | 600V AC | 2 hp @ 120 V AC 5 hp @ 240 V AC | 10 hp @ 240 V AC 15 hp @ 480 V AC 20 hp @ 600 V AC | 1 Off (Normally Open) (2) 1 On (Normally Closed) (3) | 3.35" | 1.77" | 5.5" | PLe, SIL3, CAT 4, 600V | 0000000 | 000000 |
| 18 | 24V DC | 7 | 20A | 600V AC | 1/4 hp @ 120 V AC 1 hp @ 240 V AC | 2 hp @ 240 V AC 3 hp @ 480 V AC 5 hp @ 600 V AC | 1 Off (Normally Open) (2) 1 On (Normally Closed) (3) | 2.68" | 1.77" | 4.6" | PLe, SIL3, CAT 4, 600V | 0000000 | 000000 |
| 18 | 24V DC | 9 | 20A | 600V AC | 1/2 hp @ 120 V AC 1 1/2 hp @ 240 V AC | 3 hp @ 240 V AC 5 hp @ 480 V AC 7 1/2 hp @ 600 V AC | 1 Off (Normally Open) (2) 1 On (Normally Closed) (3) | 2.68" | 1.77" | 4.6" | PLe, SIL3, CAT 4, 600V | 0000000 | 000000 |
| 18 | 24V DC | 12 | 20A | 600V AC | 1 hp @ 120 V AC 2 hp @ 240 V AC | 3 hp @ 240 V AC 10 hp @ 480 V AC 10 hp @ 600 V AC | 1 Off (Normally Open) (2) 1 On (Normally Closed) (3) | 2.68" | 1.77" | 4.6" | PLe, SIL3, CAT 4, 600V | 0000000 | 000000 |
| 18 | 24V DC | 18 | 40A | 600V AC | 2 hp @ 120 V AC 3 hp @ 240 V AC | 5 hp @ 240 V AC 10 hp @ 480 V AC 15 hp @ 600 V AC | 1 Off (Normally Open) (2) 1 On (Normally Closed) (3) | 3.35" | 1.77" | 5.5" | PLe, SIL3, CAT 4, 600V | 0000000 | 000000 |
| 18 | 24V DC | 25 | 40A | 600V AC | 2 hp @ 120 V AC 5 hp @ 240 V AC | 10 hp @ 240 V AC 15 hp @ 480 V AC 20 hp @ 600 V AC | 1 Off (Normally Open) (2) 1 On (Normally Closed) (3) | 3.35" | 1.77" | 5.5" | PLe, SIL3, CAT 4, 600V | 0000000 | 000000 |
Machine-Guard Relays
The interlocked opposing contacts won't close at the same time, so these relays are suitable for safety applications such as machine guarding. The screw terminals are recessed to prevent accidental contact with live connections. Mount them on 35 mm DIN rail (also known as DIN 3 rail) or flat surfaces. These relays are built to IEC dimensional standards.
Auxiliary contact (sold separately) allows you to add a signaling device or control another relay.
| Number of Terminals | Input Voltage | Control Current, mA | Switching Current @ 600V AC | Max. Switching Voltage | Ht. | Wd. | Dp. | Each | |
4 Circuits Controlled with 2 Off (Normally Open) and 2 On (Normally Closed)—4PST-2NO/2NC | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 10 | 24V AC | 125 | 10A | 600V AC | 2.3" | 1.7" | 2.2" | 00000000 | 000000 |
| 10 | 120V AC | 25 | 10A | 600V AC | 2.3" | 1.7" | 2.2" | 00000000 | 00000 |
| 10 | 240V AC | 12.5 | 10A | 600V AC | 2.3" | 1.7" | 2.2" | 00000000 | 00000 |
4 Circuits Controlled with 3 Off (Normally Open) and 1 On (Normally Closed)—4PST-3NO/1NC | |||||||||
| 10 | 24V AC | 125 | 10A | 600V AC | 2.3" | 1.7" | 2.2" | 00000000 | 00000 |
| 10 | 120V AC | 25 | 10A | 600V AC | 2.3" | 1.7" | 2.2" | 00000000 | 00000 |
| 10 | 240V AC | 12.5 | 10A | 600V AC | 2.3" | 1.7" | 2.2" | 00000000 | 00000 |
| Number of Circuits Controlled | Switch Starting Position | Industry Designation | Mounting Location | For Relay Width | Each | |
| 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | DPST-1NO/1NC | Front | 1.7" | 00000000 | 000000 |
Circuit Board Safety Relays
Reduce connection errors on circuit boards that control machine guards and other safety devices. Also known as force-guided contact relays, they have contacts that won’t close at the same time, causing contacts to stick or weld shut. These relays take up less space on a board than those with electrical wiring because their solder pin terminals mount directly through circuit board holes. Use them to control high-power components, such as fans and heaters, from a low-power circuit.
For technical drawings and 3-D models, click on a part number.
| Number of Terminals | Input Voltage | Control Current, mA | Switching Current @ Voltage | Max. Switching Voltage | Mechanical Life Cycles | Ht. | Wd. | Dp. | Pin Lg. | Each | |
2 Circuits Controlled with 2 Off (Normally Open) or 2 On (Normally Closed)—DPDT | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 8 | 24V DC | 29 | 8 A @ 240 V AC | 250V AC | 10,000,000 | 1.1" | 0.5" | 1" | 0.2" | 0000000 | 000000 |
Two-Hand Safety Switches
Activate these switches with two hands, reducing the risk of accidental equipment start up. A complete system requires a switch and a safety relay.
Switches have an emergency stop push-button to immediately cut power. They are rated IP65 for protection from low-pressure washdowns.
Safety relays control the switches when you push the two buttons within 0.5 seconds of each other. Self-monitoring circuitry shuts down the entire system until repaired if any part of it fails. These relays run on 24V DC but can run on 120V AC with a power supply (not included)
For technical drawings and 3-D models, click on a part number.
Actuator | Mounting | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Circuits Controlled | Switch Starting Position | Switch Action | Industry Designation | Material | Color | Switching Current @ Voltage | Ht. | Wd. | Dp. | No. of Holes | Hole Dia. | Mounting Fasteners Included | Each | |
| 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | Springs Back (Momentary) | DPST-1NO/1NC | Plastic | Black | 8 A @ 250 V AC, 5 A @ 24 V DC | 7 5/16" | 18 1/2" | 5 7/16" | 2 | 29/64" | No | 00000000 | 0000000 |
| Input Voltage | No. of Circuits Controlled | Switch Starting Position | No. of Terminals | Industry Designation | Switching Current @ Voltage | | For DIN Rail Ht., mm | Wire Connection Type | Each | |
| 24V DC | 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | 12 | DPST-1NO/1NC | 5.5 A | 24V DC | 35 | Screw Terminals | 00000000 | 0000000 |