Best 4 Serial Card

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)

2 PORT SERIAL CARD: Serial controller card w/16950 UART based on ASIX AX99100, allows 2x DB9 ports w/bi-directional RS232 speeds up to 921.6Kbps per port, available 256 byte FIFO buffer & 9th data bit | Upgraded version of our popular card PEX2S952.
OPTIONAL CONFIGURABLE POWER: PCI Express RS232 Serial Adapter Card provides choice of 12v, 5v, or none through pin 9 w/up to 2A total.
Each of the 2 ports are individually configurable.
STANDARD PROFILE & LOW PROFILE BRACKET: PCIe multiport serial card comes w/ a standard bracket pre-installed & 2x low profile brackets incl for versatile install.
VERSATILE APPLICATIONS: For standard profile desktop/servers with uses in point of sale terminals, PLCs, control/automation in factories, scientific sensors, medical equipment, scanners, oscilloscope.
THE IT PRO'S CHOICE: Designed and built for IT Professionals, this PCIe serial adapter card is backed for life, including free lifetime 24/5 multi-lingual technical assistance.

1 PORT SERIAL CARD: Serial controller card w/ 16950 UART based on ASIX AX99100, allows 1x DB9 port w/bi-directional RS232 speeds up to 921.6Kbps per port, available 256 byte FIFO buffer & 9th data bit.
Upgraded version of our popular card PEX1S952LP.
OPTIONAL CONFIGURABLE POWER: PCI Express RS232 serial adapter card provides choice of 12v, 5v, or none through pin 9 w/up to 2A total.
STANDARD PROFILE & LOW PROFILE BRACKET: PCIe serial card comes w/ a low profile bracket pre-installed & 1x full profile bracket is incl for versatile install.
VERSATILE APPLICATIONS: For low/standard profile desktop/servers w/ uses in point of sale terminals, PLCs, control/automation in factories, scientific sensors, medical equipment, scanner, oscilloscope.
THE IT PRO'S CHOICE: Designed and built for IT Professionals, this PCIe serial adapter card is backed for life, including free lifetime 24/5 multi-lingual technical assistance.

(It's NOT 15 pin VGA Monitor Cable) The Male Serial to USB cable (9 pin to USB A male) allows your PC to connect RS-232 serial devices and programs that communicate through COM ports.
USB to serial adapter is designed for connecting serial devices such as DB9 equipped PC, router, GPS, Programming machine, barcode scanner, label writer, serial modem, digital camera, card reader, palm PC and digital organizer, etc.
USB to RS232 cord for Windows 10, 8.1, 8, 7, Mac OS 8 or higher, Linux 2.4.0 and later.
FTDI USB to serial cable is built with a high performance quality processor chip (FT232 Chipset), which makes it one of the most reliable com port to usb adapter on the market.
4ft DB9 serial port to USB converter with LED light helps you check the connection status easily.

USR-G781 is Industrial Serial RS232 RS485 to 4G LTE Modem with Ethernet /LAN Port and Sim Card Slot.
ARM High Performance Processor, Support 4 Socket Independent Connection.
Heartbeat Packet: can be sent to Serial or Network Periodic. To Ensure Connection is Reliable, put an end to Dead Link.
Identity /Registration Packet: Identified Header can be Added to Packets to Check Connection Status.
Serial port protection: Reverse Connection Projection, ESD Anti-Surge, Anti-static, Surge Protection.

Add 1 parallel port and 2 RS-232 serial ports to your standard or low-profile computer through a PCI Express expansion slot.

1.Upgrade the firmware by SD card. It is easy and convenient to operate.This display board has higher compatibility. Users can select two work modes,they are UART serial port screen mode and 12864 screen mode..
2.Serial port screen mode supports two printing modes: SD card and U disk..
3.Reserve WIFI port, and WIFI function is realized by external WIFI module.
4.Reserve the extension port of filament breaking detection (FIL-DET).
Reserve the extension port of automatic shutdown after printing (PS-ON).
5.2 sets of UART serial port extension ports are reserved for DIY use..

...o: Integrated Intel graphics media accelerator HD, Peripheral Interfaces: Back panel -two connectors for line-in/ microphone and line-out, Front panel - two front-panel connectors for headphones and microphone, eSATA - one 7-pin connector, Network -one RJ45 connector, Parallel -one 25-pin connector (bidirectional), Serial -one 9-pin connector.
16550C-compatible, USB - Front panel - two connectors, USB - Back panel -six connectors, Video - one 15-hole VGA connector one 20-pin DisplayPort connector.
System Board Connections: one 120-pin connector PCI Express x16 data width (maximum), one 164-pin connector Express Lane, Serial ATA - three 7-pin connectors, Memory - four 240-pin connectors, Internal USB - one 10-pin connector (supports two USB ports), Processor fan - one 5-pin connector, Front I/O - one 26-pin connector, Front panel control - one 14-pin connector, Processor - one 1156-pin connector, Power 12V - one 4-pin connector, Power - one 24-pin connector, Internal serial card - one 14-pin connector, Internal speaker - one 5-pin connector, PCI Express x1 (wireless card) - one 36-pin connector, Thermal sensor - one 2-pin connector, Intruder connector - one 3-pin connector.

1.Upgrade the firmware by SD card. It is easy and convenient to operate.This display board has higher compatibility. Users can select two work....
2.Serial port screen mode supports two printing modes: SD card and U disk..
3.Reserve WIFI port, and WIFI function is realized by external WIFI module.
4.Reserve the extension port of filament breaking detection (FIL-DET).
Reserve the extension port of automatic shutdown after printing (PS-ON).
5.2 sets of UART serial port extension ports are reserved for DIY use..