Sunix PEX2S553 – 2-Port Serial Adapter
The PEX2S553 Serial Adapter is a low-profile plug-in card designed to provide two external serial ports for connecting devices such as printers, scanners, and other serial peripherals. This adapter is ideal for applications where space is limited, as it takes up only a single PCI Express slot. The device is compatible with PC, Mac, and Linux systems, making it a versatile solution for various environments. The adapter’s architecture allows for seamless integration with existing systems, providing a reliable connection for serial devices. In enterprise environments, this adapter can be used to connect serial-based equipment such as point-of-sale terminals, medical devices, and industrial control systems.
The PEX2S553 Serial Adapter is built with a high-quality chipset that ensures reliable data transfer and minimizes errors. The device supports a wide range of baud rates, from 50 bps to 921.6 Kbps, making it suitable for various serial communication applications. The adapter’s low-profile design and half-height bracket make it easy to install in small form factor systems, such as embedded systems and thin clients.
In addition to its technical features, the PEX2S553 Serial Adapter is designed to meet the needs of enterprise users who require a reliable and efficient solution for serial communication. The device is easy to install and configure, reducing the time and effort required to set up serial connections.
Technical Specifications
| Brand | Sunix |
| SKU | PEX2S553 |
| Category | Components |
| Number of Serial Ports | 2 |
| Interface | PCI Express |
| Compatibility | PC, Mac, Linux |
| View all Sunix Products → | |
Challenges Solved by this Solution
The PEX2S553 Serial Adapter solves a critical pain point for enterprise users who rely on serial communication for various applications. One of the major challenges is the limited availability of serial ports on modern systems, which can lead to bottlenecks in deployment workflows and infrastructure scalability limits. The PEX2S553 Serial Adapter provides a reliable and efficient solution for serial communication, allowing users to connect multiple serial devices to a single system. This adapter also helps mitigate security compliance gaps by providing a secure connection for serial devices. By investing in the PEX2S553 Serial Adapter, enterprise users can reduce IT overhead, improve operational efficiency, and ensure reliable serial communication.
Australian Logistics & B2B Support
As a 100% Aussie-owned and operated business, we are a trusted partner for Sunix. We empower enterprise procurement with dedicated B2B account support and flexible payment options.
Frequently Asked Questions
What is the maximum baud rate supported by this serial adapter?
The maximum baud rate supported by this serial adapter is 921.6 Kbps.
Can this serial adapter be used with Linux systems?
Yes, this serial adapter is compatible with Linux systems.
How many serial ports does this adapter provide?
This adapter provides two external serial ports.
Can I get help with installation and configuration of this serial adapter?
Yes, the TECHOM Systems Sales team can provide assistance with installation and configuration of this serial adapter.
What is the compatibility of this serial adapter with different operating systems?
This serial adapter is compatible with PC, Mac, and Linux systems.

Ready to Deploy Sunix Startech Serial Adapter – Low-profile Plug-in Card – Pci Express – Pc, Mac, Linux – 2 X Number Of Serial Ports External (PEX2S553)?
Product Ref: TOS-1575334 • Get enterprise pricing, volume discounts, and Australian support.























