# Wired I/O Expander Dahua ARM9A4-P-W2(868) — wired inputs/outputs expansion module

**URL:** https://aio.lv/en/product--dahua-arm9a4-p-w2868--12014541
**Data updated:** 2026-03-11 20:49 (EET)
**Category:** CCTV Accessories
**Manufacturer:** DAHUA
**Manufacturer code:** ARM9A4-P-W2(868)
**EAN:** 6939554940385
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 164.99 €
**Prices and availability valid until:** 2026-07-31 23:59
**Price without VAT (21%):** 136.36 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--dahua-arm9a4-p-w2868--12014541

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.89 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

Dahua ARM9A4-P-W2(868) is a wired inputs/outputs expander designed to extend alarm, sensor and control wiring for security and automation systems. The module provides additional wired I/O ports for integration with access control, intrusion detection and building management equipment. It is intended for reliable local expansion of I/O capacity in surveillance and security installations.

## Long description

Dahua ARM9A4-P-W2(868) is a wired I/O expander designed to extend wired inputs and outputs for security and automation systems. The module provides additional wired I/O ports to integrate sensors, alarm panels and control devices with surveillance and access control installations. It is intended for local expansion of I/O capacity in environments where reliable wired connections are required for intrusion detection, alarm signaling and device control.
Advantages
The expander offers a practical way to increase the number of wired inputs and outputs without replacing core controllers or recorders. It supports straightforward integration with existing security and building management equipment and reduces the need for complex rewiring. The wired connection approach ensures stable signal transmission and predictable latency for alarm and control events.
Suitable for
Expanding alarm and sensor inputs in commercial and residential surveillance systems
Adding output control lines for sirens, relays or external signaling devices
Integrating additional door sensors and access control inputs with existing controllers
Local I/O expansion for building management and automation projects
Key specifications
Function: wired inputs/outputs expansion module for security and automation systems
Application: extends I/O capacity for alarm, sensor and control wiring
Integration: designed for connection with surveillance, access control and building management equipment
Connection type: wired I/O ports for reliable physical signaling
How to use
Install the Dahua ARM9A4-P-W2(868) module near the devices or zones where additional input or output lines are required. Connect sensor and alarm wires to the module's input terminals and control devices such as sirens or relays to the output terminals. Integrate the module with the primary controller or recorder according to the system wiring plan, and configure the host system to recognize and use the added inputs and outputs. Follow standard safety and wiring practices, and ensure power is disconnected during installation.
Usage recommendations
Place the module in a dry, secure enclosure close to the devices it expands, and use appropriate cable types and shielding for alarm and sensor lines. Verify compatibility and pin assignments with the host controller before final wiring and test each input/output after installation to confirm correct operation.

## FAQ

### How much does the Dahua ARM9A4-P-W2(868) Wired I/O Expander cost, and is it available for purchase?

The price is 164.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 8 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 09.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Dahua ARM9A4-P-W2(868) Wired I/O Expander be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All DAHUA products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized DAHUA service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12014541/67503344_large.webp