NI-9421 WITH DSUB NI-9421 is an 8-channel digital input module (24V DC, sinking) with D-SUB connector for industrial automation. Ideal for reading sensors, switches, and control signals in CompactDAQ and CompactRIO systems. 100% fully tested, working condition. Reliable and easy to connect.

FAQ - Frequently Asked Questions

(Optimized for overseas customers, automation components, new & used parts)

Is the product quality guaranteed?

LEI LI ELECTRONICS CO., LTD. specializes in industrial automation components, including both new and used/refurbished parts. All products undergo professional inspection and functional testing before shipment to ensure they meet operational standards.

What is your return policy?

New parts: Eligible for return within the period specified in the product listing, subject to terms and conditions.

Used/refurbished parts: Sold as-is, with returns only accepted if verified defects are found upon receipt.

Please confirm the specific terms with our customer service before placing an order.

Are your prices competitive?

Our pricing is based on product condition (new/used), availability, and market standards. We strive to offer competitive pricing while maintaining reliable quality.

How fast do you ship orders?

Orders with in-stock items are typically shipped within 1–2 business days. Our default shipping service is a reliable cross-border courier partner. We can also arrange alternative shipping solutions based on your requirements. A tracking number will be provided once your order is dispatched.

Can you help with bulk or BOM-based purchasing?

Yes, we offer one-stop BOM kitting services for industrial automation projects. Simply provide your parts list to our customer service team, and we will assist you with sourcing available components.