Wireless Relays | McMaster-Carr

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9 Products

Wireless Enclosed Relays

Send a signal to turn equipment on and off from up to 150 feet away without having to run electrical wire. These relays have an enclosure to protect the terminals from dust and accidental bumps. They can be set to transmit, receive, or both at once. You’ll need at least two relays to switch a device. They have an alarm that can be set to check for certain conditions before transmitting a signal. For example, you could set these relays to send a signal to turn on an air conditioner if all windows are closed. The repeat function extends the transmitting signal through a maximum of two receiving relays.

Relays that are set to transmit can be linked up to as many receiving relays as you need. Relays set to receive can be linked up to 30 transmitting relays. All relays connect to dry contacts on your switch, sensor, or controller. Use the wire leads to connect them to a power source.

UL and C-UL listed, all meet American and Canadian safety standards. Rated NEMA 1, they should only be used indoors.

										Wire Lead		Conduit Connection
	Input Voltage	Control Current, mA	Switching Current @ Voltage	Max. Switching Voltage, V AC	hp @ Switching Voltage	Ht.	Wd.	Dp.	Max. Transmission Distance, ft.	Lg.	No. of	Gender	Trade Size	Thread Type	Enclosure Rating	Features		Each
1 Circuit Controlled with 1 Off or 1 On—SPDT







				Conduit-Hub Mount/Surface Mount

				24V AC, 24V DC	69	20 amp @ 277V AC	277	2 hp @ 277V AC	2.3"	3.2"	1.8"	150	16"	7	Male	1/2	NPT	NEMA 1	Alarm, Repeat Function	3918N15	0000000


				120V AC	73	20 amp @ 277V AC	277	2 hp @ 277V AC	2.3"	3.2"	1.8"	150	16"	7	Male	1/2	NPT	NEMA 1	Alarm, Repeat Function	3918N11	000000
				208V AC	80	20 amp @ 277V AC	277	2 hp @ 277V AC	2.3"	3.2"	1.8"	150	16"	7	Male	1/2	NPT	NEMA 1	Alarm, Repeat Function	3918N12	000000
				240V AC	80	20 amp @ 277V AC	277	2 hp @ 277V AC	2.3"	3.2"	1.8"	150	16"	7	Male	1/2	NPT	NEMA 1	Alarm, Repeat Function	3918N13	000000
				277V AC	80	20 amp @ 277V AC	277	2 hp @ 277V AC	2.3"	3.2"	1.8"	150	16"	7	Male	1/2	NPT	NEMA 1	Alarm, Repeat Function	3918N14	000000

Smart DIN-Rail Mount Multifunction Timer Relays


1 Circuit Controlled	2 Circuits Controlled

Whether installed in an electrical cabinet or hard-to-reach area, these timer relays are controlled remotely from your smartphone. They connect to your phone via a free downloadable app with NFC (Near Field Communication), so you can set time delay ranges, adjust settings, and save programs. An LED indicator on the relay shows that your switch is on and whether it’s actuated. Mount them directly to 35 mm DIN rail (also known as DIN 3 rail).

Although these relays have 30 different functions, they all fall into 11 categories. Within these categories, you can select different functions to allow you to add a switch, program a delay, or change how the relay responds to a trigger (turning on or off, pausing, or resetting).

Delayed Start (Delay on Make) Timer—These functions allow you to set how long it takes for the relay to turn on after input voltage is applied. For example, a drill starts pumping lubricant immediately, but it does not start rotating until the set time has elapsed.

Delayed Switch Off (Delay on Break) Timer—These functions use a switch instead of input voltage. When the switch is turned off, the relay remains on for a programmed amount of time before turning off. For example, a projector’s light is turned off with a switch, but its cooling fan continues to run for a set time.

Delayed Switch-On with Delayed Switch-Off Timer—This function uses a switch instead of an input voltage. It allows you to set how long it takes the relay to turn on after a switch is turned on, and how long it will stay on after the switch is turned off. For example, a furnace turns on, but the fan doesn’t start pushing air through the vents until it has been heated. When the furnace turns off, the fan keeps blowing to circulate all the hot air.

Interval Timer—These functions use input voltage to turn on the relay for a programmed amount of time. For example, when a part moving down a conveyor reaches a certain location, a cleaning spray comes on for a set amount of time.

Switch on (Single Shot) Timer—These functions require a switch to activate the relay, which stays on for the programmed amount of time. For example, lights in a storage room are turned on with a switch and stay on for a set time before turning off.

Repeat-Cycle Timer—These functions start with an on cycle and then alternate between an on cycle and off cycle of equal durations until input voltage is removed, such as with a flashing light.

Asymmetrical-Repeat-Cycle Timer—These functions start with an on-cycle and then have an off-cycle, but these cycles have different durations. The cycles repeat until input voltage is removed. For example, a sprinkler system sprays in short bursts followed by longer rest periods, on and off until input voltage is removed.

Manual-Switch-Control Timer—Use these functions to turn the relay on and off with a switch.

Fixed On/Off Timer—The on function keeps the relay on whenever input voltage is applied; it will only turn off if the voltage is removed. The off function keeps the relay in an off state, even if input voltage is applied.

Star-to-Delta Timer—These functions allow you to set the time delay within the relay's range to switch contacts on a three-phase motor from star to delta configuration. Since star configuration takes less voltage to start than delta, these functions prevent voltage dips that often happen when a motor starts and are gentler on mechanical parts.

Switch-On Asymmetrical Repeat Cycle Timer—These functions require a switch to activate the timing function. The input voltage is applied the whole time, and when you turn the switch on, the relay begins with an on-cycle followed by an off-cycle. These cycles have different durations, and they repeat until you turn the switch off. They could be used to turn on a motor or other system for a short period and then turn it off for a longer rest period, repeating that pattern until the switch is turned off.

	Input Voltage	Control Power, W	Timer Relay Function	Overall Timing Range	Switching Current @ Voltage	Max. Switching Voltage, V AC	Ht.	Wd.	Dp.	Operating System Compatibility	Features		Each
1 Circuit Controlled with 1 Off or 1 On—SPDT



	8	12V AC, 24V AC, 48V AC, 120V AC, 240V AC, 12V DC, 24V DC, 48V DC, 60V DC, 120V DC, 240V DC	0.15	Manual Switch Control Fixed On/Off Switch on (Single Shot) Delayed Start (Delay on Make) Delayed Switch Off (Delay on Break) Delayed Switch-On with Delayed Switch-Off Interval Repeat Cycle Asymmetrical Repeat Cycle Switch-On Asymmetrical Repeat Cycle	0.1 sec. to 999 day	8 amp @ 240V AC	250	4.1"	0.7"	2.5"	Android 5.0 or Later, iOS 14.4 or Later	LED Indicator	8491N12	000000


	2 Circuits Controlled with 2 Off or 2 On—DPDT



			9	24V AC, 48V AC, 120V AC, 240V AC, 24V DC, 48V DC, 60V DC, 120V DC, 240V DC	0.6	Manual Switch Control Fixed On/Off Switch on (Single Shot) Delayed Start (Delay on Make) Delayed Switch Off (Delay on Break) Delayed Switch-On with Delayed Switch-Off Interval Repeat Cycle Asymmetrical Repeat Cycle Switch-On Asymmetrical Repeat Cycle Star-to-Delta	0.1 sec. to 999 hr.	8 amp @ 240V AC	250	3.5"	0.9"	2.9"	Android 4.4 or Later, iOS 14.5 or Later	LED Indicator	8491N11	00000

Dual-Channel DIN-Rail Mount Multifunction Timer Relays

Control two steps of an electrical process from a single relay—with two fully independent channels and 30 different functions, these relays give you a wide range of possibilities. Each channel has its own output, so you can run two different functions (one per circuit) at the same time. Mount them to 35 mm DIN rails (also known as DIN 3 rail) and connect them to lighting systems, conveyors, electric motors, and other systems. These relays are UL Listed, C-UL Listed, and CE Marked, meaning they meet U.S. and international safety standards.

View times, function names, and on/off status for both channels at once using the digital display. You can program these relays with a joystick on the face, which is easier to use than the rotary dials on traditional relays. You can also program them using an Android phone with NFC (near field communication) capability, which is commonly used for mobile payment. Once you select the functions you need, hold the phone against the relay to program.

Connect switches to inputs on these relays to trigger, pause, and reset functions. Turning on a switch connected to the pause input stops functions until the switch is turned off. A switch connected to the reset input will start functions from the beginning. If the relay is actively receiving a signal, the function will restart right away. If there is no signal, the function will stop and reset, so it starts from the beginning the next time it’s triggered. You can use switches to pause or reset both channels at once, or for one channel only.

Although these relays have 30 different functions, they all fall into 10 categories. Within these categories, you can select different functions to allow you to add a switch, program a delay, or change how the relay responds to a trigger (turning on or off, pausing, or resetting).

Repeat-Cycle Timer—When input voltage is applied, the relay turns on for a duration, then off for the same duration. They alternate between the two until input voltage is removed. For example, a flashing light stays on and off for equal periods of time.

Manual-Switch-Control Timer—Use these functions to turn the relay on and off with a switch.

Proximity Sensor Compatability (PNP and NPN)—Use relays with proximity sensor compatibility to activate functions when your sensor is triggered, such as when an object approaches or a liquid level changes. These relays are compatible with both standard styles of sensors, PNP and NPN, and are often used for warning signals, motion-detecting light and heating systems, and automated assembly lines.

					Timing Range
	No. of Terminals	Input Voltage	Control Current, mA	Timer Relay Function	No. of	Overall	Switching Current @ Voltage	Max. Switching Voltage, V AC	Ht.	Wd.	Dp.	Features		Each
2 Circuits Controlled with 2 Off and 2 On—DPDT



		12	12V AC, 24V AC, 12V DC, 24V DC	8	Manual Switch Control Fixed On/Off Switch on (Single Shot) Delayed Start (Delay on Make) Delayed Switch Off (Delay on Break) Delayed Switch-On with Delayed Switch-Off Interval Repeat Cycle Asymmetrical Repeat Cycle Switch-On Asymmetrical Repeat Cycle	30	0.1 sec. to 9,999 hr.	16 amp @ 240V AC	240	3.4"	1.4"	2.2"	2 Individually Programmable Timers, LCD Screen, Proximity Sensor Compatability (PNP and NPN)	7105N11	0000000


		12	120V AC, 240V AC, 110V DC, 240V DC	16	Manual Switch Control Fixed On/Off Switch on (Single Shot) Delayed Start (Delay on Make) Delayed Switch Off (Delay on Break) Delayed Switch-On with Delayed Switch-Off Interval Repeat Cycle Asymmetrical Repeat Cycle Switch-On Asymmetrical Repeat Cycle	30	0.1 sec. to 9,999 hr.	16 amp @ 240V AC	240	3.4"	1.4"	2.2"	2 Individually Programmable Timers, LCD Screen	7105N12	000000