# PCIe RS232 Serial Controller Longshine LCS-6321M – 2x RS232 ports, 0.1 kg

**URL:** https://aio.lv/en/product--longshine-lcs-6321m--3555880
**Data updated:** 2026-02-12 09:54 (EET)
**Category:** I/O Adapters & Controllers
**Manufacturer:** Longshine
**Manufacturer code:** LCS-6321M
**EAN:** 4016621128968
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 29.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 24.37 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--longshine-lcs-6321m--3555880

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.99 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

Longshine LCS-6321M is a PCIe serial controller card providing two RS232 ports. Designed for systems requiring legacy serial connectivity, it installs into a PCIe slot to add hardware-level UART interfaces. Suitable for connecting industrial devices, modems, POS terminals or instrumentation. Compact, lightweight (0.1 kg) solution to expand serial I/O on desktops or embedded PCs.

## Long description

Longshine LCS-6321M is a PCIe RS232 serial controller card that provides two hardware RS232 ports. The card installs into a PCIe slot to add UART-based serial connectivity to desktop or embedded systems where legacy serial interfaces are required. It is designed for compact installations and weighs approximately 0.1 kg, offering a space-efficient way to connect industrial devices, modems, POS terminals and measurement instruments that rely on RS232 communication.
Advantages
The Longshine LCS-6321M delivers two independent RS232 ports on a single PCIe card, enabling reliable serial communication at the hardware level. Its compact form factor and low weight make it suitable for tight chassis or embedded PC environments. As a purpose-built controller, it provides direct serial I/O without depending solely on USB-to-serial adapters, reducing latency and improving compatibility with legacy equipment.
Suitable for
Connecting industrial automation devices requiring RS232 serial links
Attaching external modems or telemetry equipment
Integrating point-of-sale (POS) peripherals with serial interfaces
Interfacing laboratory instruments and measurement devices
Key specifications
Interface type: PCIe card
Serial ports: 2 × RS232
Function: hardware UART-based serial controller
Form factor: low-profile/standard PCIe compatible (installable in PCIe slot)
Weight: approximately 0.1 kg
How to use
Install the LCS-6321M into an available PCIe slot on a powered-off system and secure the bracket. After booting, install any required drivers provided by the system or Longshine to ensure the operating system recognizes the serial ports. Connect RS232 cables from the card’s external connectors to the target devices and configure serial port parameters (baud rate, parity, data bits, stop bits, flow control) in the host software or device settings to match the connected equipment.
Usage recommendations
For stable operation, use shielded RS232 cables of appropriate length for your environment, set matching serial parameters on both ends, and verify driver compatibility with your operating system. Where possible, avoid frequent hot-plugging of serial peripherals; install the card and connect devices while the system is powered off to reduce risk of connector or device damage.

## Specifications

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.1 kg |

### Packaging data

| Feature | Value |
|---|---|
| Package depth | 0.18 mm |
| Package height | 0.05 mm |
| Package width | 0.16 mm |

## FAQ

### How much does the Longshine LCS-6321M PCIe RS232 2-port controller cost, and is it available for purchase?

The price is 29.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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 01.07.2026 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. All transactions are 100% secure and encrypted.

### 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 Longshine 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 Longshine 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

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: weight, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/3555880/47581164_large.webp