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

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.