mPCIe 4-port Opto-Isolated RS-232/485 serial

  • Description
  • Specifications
  • Ordering Guide
  • Optional Accessories

The DS-MPE-SER4OPT is a rugged, low cost 4-port opto-isolated PCIe MiniCard serial module that is ideal for serial I/O expansion in embedded and OEM applications.

It offers four RS-232/485 serial ports in the PCIe MiniCard full size form factor with an extended operating temperature of -40ºC to +85ºC. Data rates on every port are up to 1Mbps in RS-232 mode, and 10Mbps in RS-485 mode. Models can be ordered with 4 RS-232 ports, 4 RS-485 ports, or 2 RS-232 and 2 RS-485 ports.

Extended temperature capability (-40°C to +85°C) enables the board to operate in environments with extreme temperature swings, such as vehicles or outdoor installations. In addition, the board may be custom-configured with 0-ohm resistors in place of jumper blocks for increased ruggedness in high-vibration environments.

Number of serial ports 4
Protocols RS-232/485 on each port, configured in pairs
Maximum baud rate RS-232: 1Mbps
RS-485: 10Mbps
Termination RS-485 jumper selectable
UARTs Quad XR17V354 with PCIe interface
FIFO 256-byte TX/RX
Transceiver SP336 multi-mode
Isolation +/-500V input/output
Input power +3.3VDC +/-5%
Power consumption 0.462W @ 3.3V
Software drivers Windows 7, XP, Vista, 2000
Linux 2.6.16, 2.6.27, 2.6.31, 2.6.32
Form Factor PCIe MiniCard full size
Dimensions 50.95 x 30mm (2 x 1.18″)
Operating temperature -40ºC to +85ºC
Operating humidity 5% to 95% noncondensing
MTBF tbd
Weight 8.5g (0.3oz)


Model Description
DS-MPE-OPT4232 MPCIe 4-port RS-232 Opto-Isolated Serial Module
DS-MPE-OPT4485 MPCIe 4-port RS-485 Opto-Isolated Serial Module
DS-MPE-OPT4M22 MPCIe 2-port RS-232, 2-port RS-486 Opto-Isolated Serial Module


Model Description
CK-SER4M Cable kit with two serial cables