This product page focuses on the InLine 76623E internal PCIe x1 interface card, compared here with several alternative interface cards from InLine, DELOCK, Sunix, and Exsys brands. All these products are designed to integrate legacy serial ports and specialized peripheral hardware into computer systems, but they differ in host interface types, number and configuration of output ports, physical dimensions, and FIFO buffer capacities. The main practical distinction is that the InLine 76623E provides four RS-232 ports on a standard PCIe x1 interface with a low-profile bracket, making it a versatile choice for modern desktop enclosures and compact industrial systems requiring multiple serial connections.
⚙️ The table below compares the internal host interface, output port types and counts, FIFO buffer size, form factor, and the practical significance of these differences for real-world usage.
| Specification | InLine 76623E | InLine 76619L | DELOCK 95278 | DeLOCK 90001 | Sunix SER6437AL | EXSYS EX-44082 | Practical significance |
|---|
| Host interface | PCIe x1 | PCI | Mini PCI Express | PCIe x1 | PCIe | PCIe | Determines motherboard compatibility: older PCI cards require legacy slots, whereas PCIe x1 is supported on most modern systems. |
| Output ports | 4x RS-232 | 2x RS-232, 1x Parallel | 4x RS-232 | 2x RS-232 | 4x RS-232 | 1x RS-232 (or multiple by revision) | The number and type of ports dictate how many and what kind of legacy peripherals (printers, industrial tools) can be attached simultaneously. |
| FIFO buffer | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 128 bytes | 16 bytes | A larger buffer reduces CPU overhead during high-speed data transmission and prevents packet loss in demanding environments. |
| Form factor | Low profile | Standard | Mini (30x51 mm) | Compact (45x64 mm) | Compact (65x68 mm) | Compact (78.5x66.8 mm) | Low profile and mini dimensions allow installation in narrow server chassis and space-constrained industrial PCs. |
◎ The table below shows which product is most suitable for specific use cases, setup requirements, or system types.
| Use case | Recommended product | Why |
|---|
| Connecting four modern RS-232 devices on a standard PCIe slot | InLine 76623E | Provides four serial ports, a large FIFO buffer, and a low-profile design ideal for contemporary systems. |
| Interfacing with legacy parallel printers and two serial devices | InLine 76619L | Combines parallel IEEE 1284 and serial connectivity, though it relies on the older PCI bus format. |
| Integration into mini-PCs or embedded systems using Mini PCIe | DELOCK 95278 | Features a specialized tiny form factor specifically built for compact embedded device expansions. |
| Basic connection of just two serial devices on a standard PCIe board | DeLOCK 90001 or Sunix SER6437AL | Suitable for straightforward setups where four ports are not required but stable PCIe connectivity is needed. |
| Compatibility with older operating systems and adjustable voltage/bit settings | EXSYS EX-44082 | Offers broad compatibility with older Windows versions and configurable bit options, despite a smaller buffer. |
The InLine 76623E stands out from alternatives through its combination of four RS-232 serial ports, a modern PCIe x1 host interface, a generous 256-byte FIFO buffer, and a low-profile bracket design. It is most suitable for users needing to connect multiple legacy or industrial peripherals to a modern desktop or compact computer system without relying on outdated expansion slots.
