Dual Port USB to Serial RS-232 Adapter with Prolific Chipset - Coolgear
Allen Bradley 1769-L30 /A CompactLogix Dual Serial Port Processor 256KB - PLCCable.com - Automation Supplies and PLC Tools
Startech .com 2-Port PCI RS232 Serial Adapter Card, Dual Serial DB9 Ports, Expansion/Controller Card, Windows/Linux, Standard/Low ProfileDua... PCI2S5502 - Corporate Armor
PCI to 2 Dual COM RS232 Serial I/O Port Riser Card PCI to 2 RS232 Expansion Card Dual Serial Port Card Support Plotter
DB9 Serial Y Adapter - DB9 Female to Dual Split DB9 Male
Dual Port USB 2.0 to RS-232 DB-9 Serial Adapter w/ FTDI Chip - Coolgear
Fujitsu Dual Serial Port RS-232 Card With Splitter Cable CP-140 S26361-F3465-L7 | eBay
Micro Connectors, Inc USB to Dual Serial DB9 Adapter Windows 10/Win 8/7/XP/Vista/Mac E07-162 - The Home Depot
2-Port PCI RS232 Serial Adapter Card DB9 - Serial Cards & Adapters | StarTech.com
Airlink RV55 Dual Serial Y-Cable (6001238) | USAT Store
2 Port DB9 Serial Port Bracket Header - DB9 Cables & DB25 Cables | StarTech.com
TTL to RJ45 Network Prt 232 to TCP USR-TCP232-E2 Dual Serial Port to Ethernet
SIIG Dual-Serial Port / RS-232 PCIe Card | eBay
Amazon.com: SIIG Dual (2) Serial Port / RS-232 and Single (1) Parallel Port PCIe Card Compatible with 16C550 UART (JJ-E20411-S1) : Electronics
Fujitsu Dual Serial Port RS-232 Card With Splitter Cable CP-140 S26361-F3465-L7 | eBay
Netmos PCI dual serial port card - CDM Computers
Amazon.com: SIIG Legacy and Beyond Series 2 Port (Dual) Serial / RS-232 PCIe Card with 16C550 UART : Electronics
2-Port PCI Express RS232 Serial Card - Serial Cards & Adapters | StarTech.com
Amazon.com: StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux (PEX2S953) : Electronics
WIC-2A/S 2 Port Smart Serial Port Interface Card - certificationtrainingsolutions.com
Startech .com 2-Port PCI RS232 Serial Adapter Card, Dual Serial DB9 Ports, Expansion/Controller Card, Windows/Linux, Standard/Low ProfileDua... PCI2S5502 - Corporate Armor
StarTech PCI Serial Parallel Combo Card with Dual Serial RS232 Ports (DB9) & 1x Parallel Port (DB25), PCI Adapter Expansion Card - Walmart.com
FlexEdge® Dual Mixed Serial Port Sled | Red Lion
USB to 2 TTL serial port USB to dual serial port Two TTL to USB5V3.3VFT2232D dual serial port - AliExpress
