StarTech.com PS74ADF-SERIAL-CARD - 4-PORT SERIAL PCIE CARD RS232/422/485
Features
4-Port Serial PCIe Card, Quad-Port PCI Express to RS232/RS422/RS485 (DB9) Serial Card, Low-Profile Bracket Incl., 16C1050 UART, Windows/Linux, TAA Compliant - Level-4 ESD Protection
- 4-PORT PCIE SERIAL CARD: On-board DIP switches allow each DB9 serial port to operate in its own independent mode, enabling the connection of RS-232, RS-422, and RS-485 devices; LED indicators to monitor data transmit/receive status
- CONFIGURABLE POWER: Quad-Port PCI Express Serial Adapter Card features configurable power of 12V (1.5A per port), 5V (1.5A per port), or no power (RI) over pin 9 via auxiliary SATA power; Per-Port power modes are individually configurable via jumpers
- APPLICATIONS: Ideal for desktops and servers, with a wide range of uses such as point-of-sale terminals, PLCs, factory control and automation, scientific sensors, medical equipment, scanners, and oscilloscopes; DB9 ports work with screw-locking cables
- STANDARD & LOW PROFILE BRACKETS: TAA-Compliant Serial Card is equipped with two standard profile brackets (pre-installed), and includes four low-profile brackets for compatibility with small form factor desktops/servers
- TECH SPECS: Asix AX99100 Chipset; 16C450 and 16C550 UART compatible; 4x 9-Pin D-Sub Ports; Max Baud 921.6Kbps per port; 256 Byte FIFO; COM Retention; Supports Windows and Linux; Odd/Even/Mark/Space/None Parity Modes; 5/6/7/8/9 Data Bits; PCIe 2.0 x1
Add serial communication support to a desktop computer or Small Form Factor (SFF) system, using this 4-Port Serial PCI Express Card. The four DB9 ports can be independently configured to support RS-232, RS-422, and 2/4-wire RS-485 standards, for communication with compliant serial peripheral devices.
Per-Port Serial Configuration
This PCIe Serial Card is equipped with on-board DIP switches, enabling each DB9 serial port to operate in RS-232, RS-422, and/or RS-485 mode(s). The card features LED indicators per port, providing real-time monitoring of port activity.
Configurable External SATA Power
The PCI Express Serial Adapter Card features three power modes that are configurable via on-board jumpers, including 12V (1.5A per port), 5V (1.5A per port), or no power (RI), over pin 9.
Legacy Connectivity
This serial card enables the continued use of legacy serial devices, preventing down time and avoiding costly upgrades. The 4-Port PCIe Serial Card is an ideal system upgrade for a wide range of applications (e.g., point-of-sale terminals, PLCs, factory control and automation, scientific sensors, medical equipment, scanners, and oscilloscopes)
Specifications
Technical Specifications
| Connector Type(s) | 1 - PCI Express x1 |
|---|---|
| External Ports | 4 - 9 pin D-Sub (DB-9) Male |
| Operating Temperature | 0°C to 70°C (32°F to 158°F) |
| Storage Temperature | -20°C to 80°C (-4°F to 176°F) |
| Humidity | 20% ~ 80% RH |
| Ports | 4 |
| Interface | Serial |
| Bus Type | PCI Express |
| Card Type | Standard Profile (LP bracket incl.) |
| Port Style | Integrated on Card |
| Industry Standards | PCI Express Version 2.0 x1 |
| Chipset ID | ASIX - AX99100 |
| LED Indicators | 4 - Data Receive LED: Flash Green to show activity4 - Data Transmit LED: Flash Yellow to show activity |
| Package Height | 1.5 in [3.8 cm] |
| Package Length | 8.1 in [20.7 cm] |
| Shipping (Package) Weight | 9.6 oz [273.2 g] |
| Package Width | 5.7 in [14.4 cm] |
| Package Quantity | 1 |
| Serial Protocol | RS-232/422/485 |
| ESD Protection | +/-8kV (Contact)+/-15kV (Air)+/-15kV (HBM) |
| Max Baud Rate | 921.6 Kbps |
| Data Bits | 5, 6, 7, 8, 9 |
| FIFO | 256 Bytes |
| Flow Control | Hardware and Software |
| Parity | Even, Odd, None, Space, and Mark |
| Stop Bits | 1, 1.5, 2 |
| General Specifications | UART Compatibility: 16C450, 16C550, 16C650, 16C750, and 16C950 |
| MTBF | 6,548,788 Hours |
| Color | Black |
| Product Height | 0.6 in [1.6 cm] |
| Product Length | 4.8 in [12.1 cm] |
| Weight of Product | 2.1 oz [60.0 g] |
| Product Width | 4.3 in [10.9 cm] |
| Cable Length | 11.8 in [30 cm] |
| OS Compatibility | Windows 7, 8, 8.1, 10, 11Windows Server 2016, 2019, 2022Linux 2.6.13 and newer (LTS Versions Only) |
| System and Cable Requirements | Computer with an available PCI Express x1 (or greater) slot |
| Included in Package | 1 - 4-Port Serial Card4 - Low-Profile Bracket3 - Ribbon Cable1 - Quick-Start Guide |
| Brand | StarTech.com |
|---|---|
| Product Type | PC Parts > IO, SCSI, IDE Cards > Serial Cards |
| Weight | 0.104 kg |
| Warranty |
|---|
Note:
Warranty period is as stated above unless the manufacturer has chosen to specify a longer period.
All warranties are return to base unless otherwise specified.
Shipping Information
- Free NZ-wide shipping on orders over $299
- Standard delivery 2–5 business days
- Rural delivery may take an additional 1–2 days
- Same-day dispatch for orders placed before 2pm (weekdays)
Returns Policy
- 7-day returns on unused items in original packaging
- Faulty or damaged products covered under warranty
- Contact our support team to initiate a return







