The Omron H3Y-4 24 VDC is a plug-in solid-state on-delay timer with 4PDT output contacts rated 3 A at 250 VAC on a resistive load, operating from a 24 VDC supply. It has the same footprint and socket as an MY relay, measures approximately 63 by 28 by 21.5 mm and weighs about 50 g.
The H3Y is the timer you fit when a machine needs a delay and nothing more: hold the conveyor for two seconds after the photocell clears, wait for the pump to prime before opening the valve, delay the fan after the heater shuts off. It plugs into the same socket family as the MY relay, so it drops straight into an existing interface row, and the time is set with a dial on the front rather than through a program.
Ratings and Characteristics
| Model | Contacts | Resistive rating | Socket |
|---|---|---|---|
| H3Y-2 | DPDT (2 changeover) | 5 A at 250 VAC | PYF08A (8-pin) |
| H3Y-4 | 4PDT (4 changeover) | 3 A at 250 VAC | PYF14A (14-pin) |
Operating voltage range is 85 to 110 percent of the rated supply voltage, except the 12 VDC version which is 90 to 110 percent. Power consumption ranges from about 0.9 W on 12 VDC to about 1.8 VA on 230 VAC. Repeat accuracy is plus or minus 1 percent of full scale maximum, and plus or minus 1 percent with an additional 10 ms on the 0.5 second range. Ambient operating temperature is -10 to 50 degrees C with no icing.
Time Ranges
The H3Y is supplied with a fixed time range that is selected at the time of ordering, covering settings from 0.5 seconds to 120 seconds and from 3 minutes to 3 hours, with several rated time points in between. State the time range you need with your enquiry, or send the model code printed on the timer you are replacing and we will match it.
Supply Voltages
The range covers 24 VAC, 100 to 120 VAC and 200 to 230 VAC, and 12, 24, 48, 100 to 110 and 125 VDC. This item is the 24 VDC version.
Typical Applications
- Delaying a conveyor, fan or pump start after a signal
- Run-on delay for a cooling fan after a heater or motor stops
- Sequencing two machine steps without adding a PLC
- Purge and pre-fill delays on filling and dosing equipment
- Simple interlocks in retrofit panels where no spare PLC output exists
Socket
This timer plugs into the PYF14A 14-pin DIN-track socket, the same socket family used by the MY relays, so a timer and a relay can share a standard row of sockets in the panel.
Frequently Asked Questions
What is Omron H3Y-4?
It is a plug-in solid-state on-delay timer with 4PDT contacts rated 3 A at 250 VAC, set by a dial on the front and mounted in a standard relay socket.
What is the difference between H3Y-2 and H3Y-4?
H3Y-2 has two changeover contacts rated 5 A and uses an 8-pin socket. H3Y-4 has four changeover contacts rated 3 A and uses a 14-pin socket.
Is the time range adjustable after purchase?
The dial adjusts within the range the timer was built for, but the range itself is fixed at ordering. Specify the range you need, or quote the code on the timer being replaced.
Which socket does it use?
The PYF14A 14-pin DIN-track socket, the same family as the MY relays.
How accurate is it?
Repeat accuracy is plus or minus 1 percent of full scale maximum, with an extra 10 ms allowance on the 0.5 second range.
