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USB to serial RS232 adapter with two ports
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2-Port PCI RS232 Serial Adapter Card DB9 - Serial Cards & Adapters | StarTech.com
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Siig Dual-Serial Port PCI RS-232 CTLR (LB-S00014-S1)
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Airlink RV55 Dual Serial Y-Cable (6001238) | USAT Store
KeyFob I2C Converter with Dual Serial to 16-Port I2C - store.ncd.io
Startech .com 2-Port PCI RS232 Serial Adapter Card, Dual Serial DB9 Ports, Expansion/Controller Card, Windows/Linux, Standard/Low ProfileDua... PCI2S5502 - Corporate Armor
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Allen Bradley 1769-L30 /A CompactLogix Dual Serial Port Processor 256KB - PLCCable.com - Automation Supplies and PLC Tools
Netmos PCI dual serial port card - CDM Computers
StarTech.com Dual Serial Parallel PCI Card - 3 Port 2S1P PCI (PCI2S1P)
Dual-Serial Port plus Single Parallel Port PCIe Card
Micro Connectors, Inc USB to Dual Serial DB9 Adapter Windows 10/Win 8/7/XP/Vista/Mac E07-162 - The Home Depot
Fujitsu Dual Serial Port RS-232 Card With Splitter Cable CP-140 S26361-F3465-L7 | eBay
PCI to 2 Dual COM RS232 Serial I/O Port Riser Card PCI to 2 RS232 Expansion Card Dual Serial Port Card Support Plotter
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BLACK BOX, PCI CARD, IC187C, 16850 UART, DUAL SERIAL PORT, RS 232/422/485, 7201 : IRONTIME SALES INC.
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FlexEdge® Dual Mixed Serial Port Sled | Red Lion
