Omron LY2-0 24VDC General Purpose Relay
The Omron LY2-0 24VDC general purpose relay is one of the most practical relay options for modern industrial control systems. Because 24 VDC is widely used in PLC panels, sensors, control modules, and machine automation, this relay is often selected when a low-voltage DC control signal must switch separate AC or DC circuits.
Technical Overview
The LY2-0 24VDC is a DPDT, or 2 Form C, electromechanical relay. Distributor data for the LY2-0-DC24 version lists a 24 VDC coil, 10 A contact rating, 250 VAC and 125 VDC maximum switching voltage, 2,500 VA and 1,250 W maximum switching load, 36.9 mA coil current, 650 ohms coil resistance, 19.2 VDC must-operate voltage, 2.4 VDC must-release voltage, silver alloy contacts, and 25 ms operate and release times.
Why 24 VDC Relays Are Widely Used
In automation panels, 24 VDC has become a standard control voltage because it works well with PLC outputs, proximity sensors, push buttons, safety modules, and interface devices. The Omron LY2-0 24VDC relay fits naturally into this environment by allowing a controller output to energize a coil while the relay contacts handle a separate switching task.
Typical Applications
This relay can be used for signal isolation, alarm circuits, pilot light control, solenoid switching, interposing relay functions, machine status outputs, and general panel logic. It is especially useful when the controller output should not directly switch the load, or when electrical separation between control and load circuits is desired.
Contact and Load Planning
The relay’s 10 A rating makes it versatile, but the actual application must still be reviewed. DC loads can be more demanding to interrupt than AC loads because the arc may not naturally pass through zero. Inductive DC loads should be managed with suitable suppression, and contact life should be considered when switching frequent or high-energy loads.
Replacement Guidance
When replacing an existing relay, confirm the complete code, coil voltage, terminal style, contact form, socket compatibility, and load rating. A relay with the same physical size but a different coil voltage can cause immediate malfunction. For additional Omron references, visit Omron information.
Omron LY2-0 24VDC FAQ
What is the Omron LY2-0 24VDC relay?
It is a general purpose electromechanical relay with a 24 VDC coil and DPDT contacts. It is commonly used as an interposing relay in automation and control systems.
Can a PLC output drive this relay?
In many cases, yes, but the PLC output must be able to supply the required coil current. The coil current should be checked against the PLC output rating before installation.
Is this relay suitable for AC load switching?
Yes, it can switch AC loads within its rated limits. The coil is 24 VDC, but the contacts can switch separate circuits according to their voltage and current ratings.
Omron LY2-0 24VDC What is the difference between coil voltage and contact voltage?
Coil voltage is the voltage used to energize the relay. Contact voltage is the voltage being switched by the relay contacts. These can be different, as long as the ratings are respected.
Why is the 24 VDC version common in automation?
Many automation panels use 24 VDC control power. This relay matches that environment and allows controllers, sensors, and low-voltage control circuits to operate isolated switching contacts.
Can this relay replace a 24 VAC relay?
No. A 24 VDC coil relay and a 24 VAC coil relay are different. The control supply type must match the relay coil specification.