Power Supply Aiphone PS-2420UL - Reliable 18V DC, 2.0A Unit

In this review the Aiphone PS-2420UL power supply earns its place for anyone installing or upgrading small security and intercom systems. The bottom line: it is a straightforward, UL listed 18V DC, 2.0 Amp supply that delivers stable power and flexible global use because it supports both 110V AC and 240V AC through a change of the AC power cord. The reviewer found it particularly useful for technicians and homeowners who need a dependable, no-frills power source that meets safety standards and avoids complicated configuration.

Key Features

• UL Listed: Provides peace of mind with a certified safety rating for building and security installations.
• Dual AC Compatibility: Can be used in both 110V AC and 240V AC environments by swapping the AC power cord, making it flexible for international or multi-site work.
• 18V DC Output: Supplies a stable 18V DC output suited to Aiphone devices and many low-voltage security components.
• 2.0 Amp Capacity: Offers enough current for small to medium intercom and accessory setups without frequent overloading.
• Compact Design: Small footprint makes it easy to mount or place inside equipment cabinets without taking extra space.

Who It's For

The PS-2420UL is aimed at installers, electricians, and homeowners running Aiphone intercoms or low-voltage security gear that require a reliable 18V DC source. Its UL listing and simple voltage compatibility make it a practical choice for compliance-minded professionals and DIYers who want an off-the-shelf replacement power supply.

Those who should look elsewhere include users needing higher current for large camera arrays or systems with many accessories, and anyone requiring integrated battery backup or advanced surge protection, since this unit is a basic, dependable AC-to-DC supply rather than a full-featured power management solution.

Pros & Cons

Pros

• UL listed safety certification suits commercial and residential installs.
• Works with both 110V AC and 240V AC when the power cord is changed, simplifying international or mixed-voltage deployments.
• 18V DC at 2.0 Amp output is stable enough for typical intercom and small security setups.
• Compact and unobtrusive form factor fits into existing equipment racks or cabinets.

Cons

• Does not include built-in battery backup or advanced surge suppression, so add-on protection may be required for critical systems.

Specifications

Model	PS-2420UL
Output Voltage	18V DC
Output Current	2.0 Amp
Safety Listing	UL listed
Input Voltage	110V AC or 240V AC (change cord)
Brand	Aiphone

Our Verdict

The Aiphone PS-2420UL is a sensible buy for anyone needing a reliable, code-friendly 18V DC power source for intercoms and small security systems. It represents good value when a simple, UL listed supply is required, though systems needing higher current or integrated backups will need additional components.

Frequently Asked Questions

Can this unit be used outside the United States?
Yes, the PS-2420UL supports 110V AC and 240V AC input by changing the AC power cord to one that matches local mains standards.

Does it provide enough power for multiple accessories?
The 2.0 Amp output suits small to medium setups; larger arrays or many accessories may exceed its capacity and require a higher current supply.

Is battery backup included?
No, this model is a basic UL listed AC-to-DC power supply without built-in battery backup or advanced surge protection.