Multiport Serial Adapters

StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe to Serial DB9 RS-232 Controller Card - 16950 UART - Windows, macOS, Linux - 4 port PCI Express RS232 serial controller card w/16950 UART/ASIX AX99100 - Bi-directional speeds 921.6Kbps/port |

StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe Serial DB9 Controller Card 16950 UART - Low Profile - Windows macOS Linux - 4 port PCI Express RS232 serial controller card w/16950 UART/ASIX AX99100 - Bi-directional speeds 921.6Kbps/port |

SIIG DP CyberSerial 4S PCIe Board - PCI Express 2.0 x1 - 4 x DB-9 RS-232 Serial Via Cable - Plug-in Card - TAA Compliant

StarTech.com 8-Port PCI Express RS232 Serial Adapter Card -PCIe to Serial DB9 Controller 16C1050 UART - Low Profile - 15kV ESD - Win/Linux - 8 port PCI Express RS232 serial adapter card 16C1050 UART 15kV ESD/Systembase SB16C1058PCI - Bi-directional speed

StarTech.com 16 Port PCI Express Serial Card - Low-Profile - High-Speed PCIe Serial Card with 16 DB9 RS232 Ports - PCI Express x1 - 16 x DB-9 Male RS-232 Serial - Plug-in Card - TAA Compliant

Advantech 4-port RS-232 PCI Express Communication Card w/Surge - PCI Express 2.0 x1 - 4 x RS-232/422/485 Serial - Plug-in Card

Advantech 4-port RS-232/422/485 PCI Express Communication Card w/Surge & Isolation - PCI Express 2.0 x1 - 4 x RS-232/422/485 Serial - Plug-in Card

Advantech 8-port RS-232 PCI Express Communication Card - PCI Express 2.0 x1 - 8 x DB-25 RS-232/422/485 Serial Via Cable - Plug-in Card

Advantech 8-port RS-232/422/485 PCI Express Communication Card - PCI Express 2.0 x1 - 8 x RS-232/422/485 Serial - Plug-in Card

Black Box PCIe Bus Serial Board - (2) RS-232/422/485, (2) DB9 - PCI Express - Plug-in Card - TAA Compliant

Brainboxes ES-413 Multiport Serial Adapter - DIN Rail Mountable - TAA Compliant

Brainboxes ES-457 Multiport Serial Adapter - DIN Rail Mountable - TAA Compliant

Tripp Lite 4-Port DB9 RS232 PCI Express Serial Card PCIe w/Breakout Cable - PCI Express x1 - 4 x DB-9 Male RS-232 Serial Via Cable - Plug-in Card

SIIG 4-port MultiPort Serial Adapter - Universal PCI - 4 x DB-9 Male RS-232 Serial - Plug-in Card - Retail

SIIG 4-port Multiport Serial Adapter - Universal PCI - 4 x DB-9 Male RS-232 Serial Via Cable - Plug-in Card - Retail