ISO 13849-1 Relays | McMaster-Carr

Filter by

System of Measurement

Input Voltage

Switching Voltage

Mounting Location

Switching Current

Number of Circuits Controlled

Electrical Phase

For Use With

Switch Designation

Number of Safety Outputs

Switch Starting Position

Height

Number of Terminals

Maximum System Safety Rating

Horsepower @ Switching Voltage

Switch Action

Wire Connection

Control Current

Relay Type

Operation Type

REACH

RoHS

Compliant with Exemptions

Not Compliant

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Specifications Met

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

Exempt

Forward

How can we improve?

21 Products

Safety Relays

Receive signals from safety monitoring relays or controllers to switch devices off and on because of a system failure. Also known as force-guided or mechanically linked contacts, the interlocking opposing contacts on these relays cannot be open or closed at the same time. To keep your system from receiving false switching signals, the interlocking opposing contact must remain open even if a contact welds closed.

IP20 rated, they have recessed terminals that prevent fingers and other objects from touching live circuits. These relays have been tested to safety standards that can help you achieve your system's PL (performance level) and SIL (safety integrity level). Choose a relay with a PL and SIL rating to meet the needs of your system. Higher ratings indicate greater safety protection. As your system becomes more complex, you generally require a higher safety protection level. Mount them to 35mm DIN rail (also known as DIN 3 Rail).

SIL 3, PLe Max. System Safety Rating—DIN-Rail Mount

Relays that meet SIL 3 are tested for applications with a probability of failure of 0.01% to 0.1% and are used for preventing fires, explosions, or toxic releases.

Mirror Auxiliary Contacts—Relays with mirror auxiliary contacts have contacts that are normally closed and cannot be open at the same time as a normally open main contact.

Nondetachable Auxiliary Contacts—Relays with nondetachable contacts have auxiliary contacts that won’t separate from the relay if there is shock or vibration.

Self-Monitoring Circuitry—When a failure is detected, relays with self-monitoring circuitry signal the controller to remove power and prevent restarting until the issue is resolved.

	Switching Current @ Voltage	Max. Switching Voltage, V AC	Aux. Contact Switch Starting Position	Ht.	Wd.	Dp.	Features		Each
Spring-Clamp-Terminal Wire Connection







	3 Circuits Controlled with 3 Off—3PST-NO

	18	24V AC, 24V DC	5	5 amp @ 120V AC	230	1 On	3.9"	0.9"	4.8"	Interlocked Opposing Contacts, LED Indicator, Mirror Auxiliary Contacts, Nondetachable Auxiliary Contacts, Recessed Terminals, Self-Monitoring Circuitry	6242N122	0000000

SIL 3, PLe, CAT IV, 600V Max. System Safety Rating—DIN-Rail and Surface Mount

Image of Product. Front orientation. Contains Annotated. Safety Relays. Safety Relays, SIL 3, PLe, CAT IV, 600V Max. System Safety Rating—DIN-Rail and Surface Mount.

Relays that meet SIL 3 are tested for applications with a probability of failure of 0.01% to 0.1% and are used for preventing fires, explosions, or toxic releases.

Relays that meet CAT 4 withstand circuit surges in electrical applications up to 600V.

Mirror Auxiliary Contacts—Relays with mirror auxiliary contacts have contacts that are normally closed and cannot be open at the same time as a normally open main contact.

Nondetachable Auxiliary Contacts—Relays with nondetachable contacts have auxiliary contacts that won’t separate from the relay if there is shock or vibration.

Self-Monitoring Circuitry—When a failure is detected, relays with self-monitoring circuitry signal the controller to remove power and prevent restarting until the issue is resolved.

						hp @ Switching Voltage
	No. of Terminals	Input Voltage	Control Current, mA	Switching Current @ Voltage	Max. Switching Voltage, V AC	Single Phase	Three Phase	Aux. Contact Switch Starting Position	Ht.	Wd.	Dp.	Features		Each
Screw-Terminal Wire Connection







				3 Circuits Controlled with 3 Off—3PST-NO

				18	120V AC	2	7 amp @ 400V AC	600	1/4 hp @ 120V AC 1 hp @ 240V AC	2 hp @ 240V AC 3 hp @ 480V AC 5 hp @ 600V AC	2 Off and 3 On	2.7"	1.8"	4.6"	Inspection Window, Interlocked Opposing Contacts, Mirror Auxiliary Contacts, Nondetachable Auxiliary Contacts, Recessed Terminals, Self-Monitoring Circuitry	6242N11	0000000


				18	120V AC	2	9 amp @ 400V AC	600	1/2 hp @ 120V AC 1 1/2 hp @ 240V AC	3 hp @ 240V AC 5 hp @ 480V AC 7 1/2 hp @ 600V AC	2 Off and 3 On	2.7"	1.8"	4.6"	Inspection Window, Interlocked Opposing Contacts, Mirror Auxiliary Contacts, Nondetachable Auxiliary Contacts, Recessed Terminals, Self-Monitoring Circuitry	6242N12	000000
				18	120V AC	2	12 amp @ 400V AC	600	1 hp @ 120V AC 2 hp @ 240V AC	3 hp @ 240V AC 10 hp @ 480V AC 10 hp @ 600V AC	2 Off and 3 On	2.7"	1.8"	4.6"	Inspection Window, Interlocked Opposing Contacts, Mirror Auxiliary Contacts, Nondetachable Auxiliary Contacts, Recessed Terminals, Self-Monitoring Circuitry	6242N13	000000
				18	120V AC	5	18 amp @ 400V AC	600	2 hp @ 120V AC 3 hp @ 240V AC	5 hp @ 240V AC 10 hp @ 480V AC 15 hp @ 600V AC	2 Off and 3 On	3.4"	1.8"	5.5"	Inspection Window, Interlocked Opposing Contacts, Mirror Auxiliary Contacts, Nondetachable Auxiliary Contacts, Recessed Terminals, Self-Monitoring Circuitry	6242N14	000000
				18	120V AC	5	25 amp @ 400V AC	600	2 hp @ 120V AC 5 hp @ 240V AC	10 hp @ 240V AC 15 hp @ 480V AC 20 hp @ 600V AC	2 Off and 3 On	3.4"	1.8"	5.5"	Inspection Window, Interlocked Opposing Contacts, Mirror Auxiliary Contacts, Nondetachable Auxiliary Contacts, Recessed Terminals, Self-Monitoring Circuitry	6242N19	000000
				18	24V DC	3	18 amp @ 400V AC	600	2 hp @ 120V AC 3 hp @ 240V AC	5 hp @ 240V AC 10 hp @ 480V AC 15 hp @ 600V AC	2 Off and 3 On	3.4"	1.8"	5.5"	Inspection Window, Interlocked Opposing Contacts, Mirror Auxiliary Contacts, Nondetachable Auxiliary Contacts, Recessed Terminals, Self-Monitoring Circuitry	6242N18	000000
				18	24V DC	3	25 amp @ 400V AC	600	2 hp @ 120V AC 5 hp @ 240V AC	10 hp @ 240V AC 15 hp @ 480V AC 20 hp @ 600V AC	2 Off and 3 On	3.4"	1.8"	5.5"	Inspection Window, Interlocked Opposing Contacts, Mirror Auxiliary Contacts, Nondetachable Auxiliary Contacts, Recessed Terminals, Self-Monitoring Circuitry	6242N21	000000
				18	24V DC	12	7 amp @ 400V AC	600	1/4 hp @ 120V AC 1 hp @ 240V AC	2 hp @ 240V AC 3 hp @ 480V AC 5 hp @ 600V AC	2 Off and 3 On	2.7"	1.8"	4.6"	Inspection Window, Interlocked Opposing Contacts, Mirror Auxiliary Contacts, Nondetachable Auxiliary Contacts, Recessed Terminals, Self-Monitoring Circuitry	6242N15	000000
				18	24V DC	18	9 amp @ 400V AC	600	1/2 hp @ 120V AC 1 1/2 hp @ 240V AC	3 hp @ 240V AC 5 hp @ 480V AC 7 1/2 hp @ 600V AC	2 Off and 3 On	2.7"	1.8"	4.6"	Inspection Window, Interlocked Opposing Contacts, Mirror Auxiliary Contacts, Nondetachable Auxiliary Contacts, Recessed Terminals, Self-Monitoring Circuitry	6242N16	000000
				18	24V DC	18	12 amp @ 400V AC	600	1 hp @ 120V AC 2 hp @ 240V AC	3 hp @ 240V AC 10 hp @ 480V AC 10 hp @ 600V AC	2 Off and 3 On	2.7"	1.8"	4.6"	Inspection Window, Interlocked Opposing Contacts, Mirror Auxiliary Contacts, Nondetachable Auxiliary Contacts, Recessed Terminals, Self-Monitoring Circuitry	6242N17	000000

Safety Relays with Diagnostic Capabilities


Relay	Relay with Time Delay

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.

Time Delay—Relays 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.

	No. of Terminals	Max. Switching Voltage	Ht.	Wd.	Dp.	For Use With	Mounting Location	Max. System Safety Rating	Features		Each
2 Circuits Controlled







		2 Off

		14	24V DC	2 amp @ 240V AC 1.5 amp @ 24V DC	250V AC	4.9"	0.69"	4.3"	Emergency Stops, Light Curtains	DIN Rail, Surface	PLe; SIL 3; CAT IV, 250V	Auxiliary PNP Output, LED Indicator	7774K73	0000000




				2 Safety Outputs with 2 Off and 2 Delayed Safety Outputs with 2 Off

				16	24V DC	3 amp @ 240V AC 3 amp @ 24V DC	250V AC, 250V DC	3.9"	0.9"	4.5"	Emergency Stops, Light Curtains	DIN Rail	PLe; SIL 3	Time Delay	6322N15	000000




						2 Safety Outputs with 2 Off and 1 Signal Output with 2 On

						16	24V AC, 24V DC	5 amp @ 240V AC 5 amp @ 24V DC	250V AC, 250V DC	3.9"	0.9"	4.5"	Two-Hand Switches	DIN Rail	PLe; SIL 3	—	6322N16	000000




								3 Safety Outputs with 2 Off and 1 Signal Output with 2 On

								16	240V AC	3 amp @ 240V AC 2.5 amp @ 24V DC	250V AC, 250V DC	3.9"	1.8"	4.5"	Emergency Stops	DIN Rail	PLe; SIL 3	—	6322N13	000000


								24	24V AC, 48V AC, 120V AC, 240V AC, 24V DC, 48V DC, 60V DC, 120V DC, 240V DC	5 amp @ 240V AC 5 amp @ 24V DC	250V AC, 250V DC	4.42"	0.9"	4.5"	Emergency Stops	DIN Rail	PLe; SIL 3	—	6322N14	00000000


								3 Circuits Controlled







												3 Safety Outputs with 3 Off

												6	24V DC	6 amp @ 240V AC 6 amp @ 24V DC	240V AC	3.7"	0.9"	4.8"	Light Curtains	DIN Rail	PLe; SIL 3	Auxiliary PNP Output, Self-Monitoring Circuitry	7933N23	000000




														3 Safety Outputs with 2 Off and 1 Signal Output with 2 On

														16	24V DC	4 amp @ 230V AC 4 amp @ 24V DC	240V AC	3.9"	0.9"	4.5"	Emergency Stops	DIN Rail	PLe; SIL 3	—	6322N19	000000


														4 Circuits Controlled







4 Off

18	24V DC																	2 amp @ 240V AC 1.5 amp @ 24V DC	250V AC	4.9"	0.89"	4.3"	Emergency Stops, Light Curtains	DIN Rail, Surface	PLe; SIL 3; CAT IV, 250V	Auxiliary PNP Output, LED Indicator	7774K76	000000

Auxiliary Contact Blocks for Relays with DC Input Voltage


Auxiliary Contact Block	Auxiliary Contact Block with Time Delay

Auxiliary contact blocks allow you to control more components, such as signaling devices or basic relays.

Time Delay—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.

	Input Voltage, V DC	Switching Current @ Voltage	Max. Switching Voltage	Ht.	Wd.	Dp.	Features		Each
5 Safety Outputs



	16	24	3 amp @ 240V AC 2.5 amp @ 24V DC	250V AC, 250V DC	3.9"	0.9"	4.5"	—	6322N22	0000000


	4 Delayed Safety Outputs



			16	24	3 amp @ 240V AC 3 amp @ 24V DC	250V AC, 250V DC	3.9"	0.9"	4.5"	Time Delay	6322N18	000000