Koyo Base Expansion Power Supply Unit D4-EX

The Koyo Base Expansion Power Supply Unit D4-EX is a robust industrial power module engineered to provide dependable power distribution and expansion support for PLC racks and automation control systems. Designed to ensure stable voltage delivery across multiple I/O and expansion modules, the D4-EX enhances system reliability, reduces downtime, and supports seamless integration with Koyo and Automation Direct controller architectures. Built with industrial-grade components and precision engineering, this power supply unit delivers consistent performance in demanding manufacturing, process, and machine control environments where reliable power infrastructure is essential.

Key Features:

• Reliable power distribution for base and expansion I/O modules

• Supports PLC rack expansion with stable voltage delivery

• Industrial-grade construction for durable performance in harsh environments

• Enhances automation system uptime and operational stability

• Compatible with Koyo DL405 and D4 series controllers

Specifications:

• Model/Part Number: D4-EX

• Product: Base Expansion Power Supply Unit

• Function: Power distribution and support for PLC expansion modules

• Application: Industrial automation, PLC systems, and machine control

• Construction: Industrial-grade power supply design

• Compatibility: Integrates with Koyo D4 and related automation platforms

• Manufacturer: Koyo

The Koyo Base Expansion Power Supply Unit D4-EX delivers dependable power support and expansion capability essential for modern industrial automation and PLC control systems. With Koyo’s reputation for engineering quality and robust design, this power supply unit enhances system power stability and reliability—making it a trusted choice for engineers and automation professionals seeking efficient, high-performance power solutions.

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.