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PCI Serial DB9 RS232 Adapter 8 ports Serial DB9 RS232 to PCI Adapter RS-232 expansion Converter Card chip Systembase
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USR-TCP232-410s RS232 / RS485 Serial to Ethernet Adapter/IP Device Server Ethernet Converter Support DHCP/DNS (USR-TCP232-410S)
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  • $99.99 
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Usr-Tcp232-410S RS232 / RS485 Serial to Ethernet Adapter/IP Device Server Ethernet Converter Support DHCP/DNS (10)
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  • $882.08 
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8 Port Serial PCI-Express with cable controller card SYSTEM BASE SD6138 Chipset RS-232 RS232 serial port expansion cards
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  • $167.99 
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  • $166.99 - $167.99
USR-DR302 DIN-Rail Modbus RS485 Serial Port to Ethernet Converter Bidirectional Transparent Transmission Between RS485 and RJ45
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  • $78.20 
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USB2.0 Type-A to TTL Converter UART STC Module Serial Programmer CH340G CH340 3.3V 5V Adapter Replace PL-2303
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  • $11.34 
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Direct from ZFBASCENTGO Direct from ZFBASCENTGO
3.3 Feet USB to RS232 Serial Cable with Prolific PL2303 Chip, DB9 Adapter for Windows 11,10, 8.1, 8,7, Linux, Mac OS, 1M /Black
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  • $29.99 
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Available Direct from BFKK Available Direct from BFKK
Quantum 4-Port RS422 RS485 Mini PCIe Serial Card with Auto Direction Control for Industrial Automation
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  • $148.99 
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Quantum High-Speed M.2 to 2-Port RS232 Serial Card for Industrial Embedded Systems PC
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  • $68.99 
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FTDI Chip Isolated USB to TTL/RS232/RS485 3 IN 1 Serial Port Adapter Industrial-grade TTL RS-232 RS-485 Isolation
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  • $40.19 
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FOR Type-C to Serial Cable Adapter USB3.1 to DB9 RS232 COM Converter 1.5m
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FOR Type-C to Serial Cable Adapter USB3.1 to DB9 RS232 COM Converter 1.5m

Limited time offer, ends 07/05

  • Model #: C43K-0420-1256
  •  
  • $33.71 
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  • $33.48 - $33.71
Sunix 4056P Serial card one-to-four lines breakout cable 4-Port Serial RS-232 Adapter
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  • $23.83 
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  • $23.08 - $23.83
FOR MiniPCIE Two Series and One Parallel RS232 Serial Port COM Port LPT Printer DB9 Pin DB25 Pin Independent Power Supply
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  • $86.15 
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  • $85.15 - $86.15
USR-WIFI232-W610 Serial RS232/RS485 to Wifi/RJ45 Converters Wifi Module ISO9001 Certificate
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  • $111.31 
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  • $110.31 - $111.31
4 port Serial RS232 RS-232 COM port to PCI-e Express PCIE Adapter with Cable 9904 Chip
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  • $95.76 
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  • $94.76 - $95.76
DTECH IOT5077(GR) USB to RJ45 RS485 Serial Cable - 1M PLC Programming Cable with 3Mbps Speed & 10KV ESD Protection
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  • $38.19 
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  • $36.99 - $38.19
USB232A-B-A | USB to Serial RS232 DB9 Adapter Cable with 3 x LED Indicators  Compatible with Windows 11, macOS 15, Linux (3FT, Male/Male)
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  • $39.99 
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Direct from BFKK Direct from BFKK
Monoprice Usb/Serial Data Transfer Cable
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  • $18.68
  •  
  • $16.98 
  • Save: $1.70 (9%)
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Direct from Monoprice Inc. Direct from Monoprice Inc.
PCI Express I/O card Dual Serial DB9 RS232 COM 2 Ports Controller Adapter riser Card Expansion card TXB068
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Direct from YEPLOOK Direct from YEPLOOK