The Omron MY2N AC24 is a plug-in miniature power relay with DPDT contacts rated 5 A at 220 VAC and 5 A at 24 VDC on a resistive load, driven by a 24 VAC coil. The N in the model code marks the version with the LED operation indicator on the top of the case, so a technician can see at a glance whether the coil is energised.
The MY series is the relay Omron built the rest of its control-panel range around, and it is the part found plugged into the interface row of almost every machine panel: it takes a low-power signal from a PLC output or a control circuit and switches a solenoid valve, a contactor coil, a lamp or a small motor. Because it plugs into a socket, a failed relay is replaced in seconds without touching a single wire, which is why it is one of the most frequently ordered spare parts in a panel.
Ratings and Characteristics
| Model | Contacts | Resistive rating | Electrical durability | Socket |
|---|---|---|---|---|
| MY2N | DPDT (2 changeover) | 5 A at 220 VAC / 5 A at 24 VDC | 500,000 operations min. | PYF08A-E (8-pin) |
| MY4N | 4PDT (4 changeover) | 3 A at 220 VAC / 3 A at 24 VDC | 200,000 operations min. | PYF14A-E (14-pin) |
Inductive load rating for this model is 2 A at 220 VAC and 2 A at 24 VDC, and maximum switching power is 1,100 VA and 120 W on a resistive load. Contact resistance is 50 milliohms maximum, operate and release time are both 20 milliseconds maximum, insulation resistance is 100 megohms minimum and dielectric strength is 2,000 VAC between coil and contacts and 1,000 VAC between contacts of the same polarity. Mechanical durability is 50,000,000 operations minimum for AC coils and 100,000,000 for DC coils, and electrical durability at rated load is 500,000 operations minimum. Ambient operating temperature is -55 to 70 degrees C, operating humidity 5 to 85 percent, and the relay weighs approximately 35 g.
Coil Voltages
The MY range covers 12, 24, 100/110, 110/120, 200/220 and 220/240 VAC, and 12, 24, 48 and 100/110 VDC. This item is the 24 VAC version. AC coils draw approximately 0.9 to 1.3 VA at 60 Hz and DC coils approximately 0.9 W. The relay is guaranteed to operate at 80 percent of rated coil voltage, and releases at 30 percent or less for AC coils and 10 percent or less for DC coils.
Typical Applications
- PLC output interface: isolating a transistor or relay output card from the load it drives
- Solenoid valve and pneumatic manifold switching on packaging, filling and bottling lines
- Contactor coil control, where the relay carries the coil current and the PLC does not
- Pilot lamps, buzzers and signal towers on machine panels
- Motor direction and start interlocks in small drives and conveyor sections
- Heater and fan control in cabinets, ovens and drying tunnels
Socket and Accessories
This relay plugs into the PYF08A-E 8-pin front-connecting DIN-track socket, and a PYC series hold-down clip keeps it seated where the panel is subject to vibration. Confirm the socket pin count matches the relay: an MY2 relay uses an 8-pin socket and an MY4 relay a 14-pin socket, and the two are not interchangeable.
Ordering the Correct Relay
Three details decide the part number: the number of poles, the coil voltage, and whether the LED indicator is required. Read the coil voltage off the label on the side of the relay being replaced rather than off the panel supply, because the control circuit often runs at a different voltage from the power circuit. If the label is unreadable, send a photograph of the relay and its socket and we will identify it.
Frequently Asked Questions
What is Omron MY2N?
It is a plug-in miniature power relay from the Omron MY family with DPDT contacts and an LED operation indicator, used as an interface relay between control signals and the loads they switch.
What is the difference between MY2N and MY4N?
MY2N has two changeover contacts rated 5 A and MY4N has four changeover contacts rated 3 A. MY2N uses an 8-pin PYF08A-E socket and MY4N a 14-pin PYF14A-E socket.
What does the N in the model code mean?
It marks the version fitted with an LED indicator that lights while the coil is energised. Models without the N are otherwise identical.
Which socket fits this relay?
The PYF08A-E front-connecting DIN-track socket. A PYC series hold-down clip is recommended in high-vibration installations.
Can I fit a MY2N with a different coil voltage?
No. The coil voltage must match the control circuit exactly. A 24 VDC coil will not operate reliably on 24 VAC, and a 24 V coil connected to 230 V burns out immediately.
How long does an MY relay last?
Mechanical durability is at least 50,000,000 operations for AC coils and 100,000,000 for DC coils. At rated electrical load the figure is 500,000 operations minimum, and that is the number that decides replacement intervals in practice.
