Best Multi Port Serial Card

Creality 3D Printer Part Limit Switch with Separate Package CNC for RAMPS 1.4 RepRap 3D Printer CR-10 10S,S4,S5,Ender 3/Ender 3 Pro/Ender 3 V2/Ender 5 (Pack of 3)

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..

The 16C650 UART serial port with data transfer rate up to 250Kbps..
The card is compatible with IEEE 1284 -1994 parallel port standard for SPP/Byte/ECP Mode.
It works as standard RS-232 port or with 5V or 12V power output for devices that require power (such as handheld scanners, table scanners, POS displays, etc.), power output configurable via jumpers.
The PCIe serial card can decrease the loading on CPU activity which helps ensure optimal system performance and keep errors from happening..
The card is with dual-profile design which fits full height and low-profile system chassis with the included spare low-profile brackets.

GOOD CHOICE - Most new computers don't have a serial port, and most serial port cards have a lot of issues, but if you're looking for a serial port to communicate with older devices, the card works well.This is the best solution for you add 4 RS232 (DB9) serial ports, using a single PCI Express expansion slot..
INDEPENDENT POWER CHIPEST - Built-in AX99100 CHIPEST,No external power supply provides RS-232 serial port or 5v 12v DC power output through the COM of the first needle or the needle 9.Stable performance, strong compatibility, high - speed storage..
4 RS232 PORT - 4 standard external RS-232 DB9 serial ports.All serial ports support slow IrDA mode and speeds up to 115200bps,compatible with 2 UART and 4 UART..
PCI EXPRESS X1 - Compliant with PCI Express 2.0 gen1, compatible with PCIE x1, x2, x4, x8, x16 slots..
BROAD COMPATIBILITY - Compatible operating system :Windows XP/ 2003 Server/ Vista/ WIN7/ WIN8.x / WIN10 / Linux Kernel 2.6 15 and later/ Android 1.x/ 2.x/ 3.x/ 4.x/ 5.x.Perfect for connecting serial modems, POS devices, PDAs, digital cameras, printers, ISDN terminal adapters and more to your system..

The 16C650 UART serial port with data transfer rate up to 250Kbps..
The card is compatible with IEEE 1284 -1994 parallel port standard for SPP/Byte/ECP Mode.
It works as standard RS-232 port or with 5V or 12V power output for devices that require power (such as handheld scanners, table scanners, POS displays, etc.), power output configurable via jumpers.
The PCIe serial card can decrease the loading on CPU activity which helps ensure optimal system performance and keep errors from happening..
The card is with dual-profile design which fits full height and low-profile system chassis with the included spare low-profile brackets.

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..

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

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.

2 PORT PCI RS232 SERIAL ADAPTER CARD: Controller card w/ 16C550 UART based on ASIX MCS9865, 2x DB9 ports w/bi-directional RS232 speeds up to 115.2Kbps/port, 256 byte FIFO buffer & 9th data bit | Upgraded version of our popular cards PCI2S550_LP & PCI2S550.
TECH SPECS: Speeds up to 115.2Kbps | 16C550 UART | 256 byte FIFO buffer | 5,6,7,8 and 9 bit character | Even, Odd, No, Space or Mark Parity | Auto IRQ & IO assignment | Supports IRQ Sharing | ASIX MCS9865 Chip.
VERSATILE APPLICATIONS: Dual Serial Port PCI Card for PCI desktops/servers used in point of sale terminals, PLCs, CNC Machines, control/automation in factories, scientific sensors, medical equipment, scanners, oscilloscope.
STANDARD PROFILE & LOW PROFILE BRACKET: PCI multiport serial COM card installs using 1x standard bracket (pre-installed) or 2x low profile brackets (incl).
Supports Windows 7 and up, Linux 2.6.x to 5.x.

MEETS INDUSTRY STANDARDS: The 2-port PCI express serial card is compliant with PCI Express 1.0a specification, and it's compatible with 1x, 2x, 4x, 8x and 16x PCI Express slots..
MAXIMUM COMPATIBILITY: The dual port DB9 to PCIe adapter is ideal for system upgrades in a wide range of applications including manufacturing equipment, POS equipment, and security devices..
HIGH-PERFORMANCE COMMUNICATION: The low-profile serial card delivers high-performance serial communication, with support for data transfer rates of up to 460Kbps..
SIMPLE INSTALLATION: The PCI dual serial adapter features IRQ sharing and supports plug-and-play connection. It has a standard-profile bracket installed, and an optional low-profile bracket..