Wiesemann & Theis GmbH

Networking, sensors and interface technology for industry, office and IT

Data sheet:

PCI Express Card 2x RS232/RS422/RS485, 1kV isolated

  • PCI Express Card 2x RS232/RS422/RS485

Two additional serial ports on the PC

The 13631 PCI Express Card provides two selectable serial RS232/RS422/RS485 interfaces with 1kV galvanic isolation.



  • 2x RS232/RS422/RS485 interfaces
  • 1x 32-bit PCI bus
  • Galvanic isolation between the ports
    • Isolation voltage 1kV DC

Management and connectivity:

Standards & more

  • Conforms to standards both in office and industrial environments:
    • High noise resistance per EN 61000-6-2
    • Low noise emission per EN 55032:2015 + A1 Cl. B, EN 61000-3-2 & EN 61000-3-3
  • 5 year guarantee

Worth knowing

PCI Express has almost completely replaced the long-in-the-tooth PCI bus system in current PC designs. There are still PC motherboards which offer slots for both systems, but due to cost and performance considerations current boards are equipped almost exclusively with PCI Express slots.

PCI Express is not a traditional PC bus system in which all plug-in cards are in parallel with the majority of bus lines. PCI Express is rather a star type wiring technique using a point-to-point connection between the PC and plug-in card to allow significantly greater transmission speeds than a bus solution with parallel wired slots would be able to process.

Data transmission to the plug-in cards in PCI Express is serial using differential wire pairs, so-called "lanes", which run at a speed of 2.5 or 5 GB/s. For cards with high data throughput (graphics and network cards, hard drive controllers), multiple lanes are routed to a slot, whereas cards with less complexity get by easily with one lane.

The PCI Express standard enables solutions in which one (x1), four (x4), eight (x8) or 16 (x16) lanes are routed to a slot, with the connectors differing in the mechanical configuration, pin configuration and load capacity of the supply voltage.

The mechanical coding of cards and connectors ensures however that short cards can be easily used in long slots. For example, a x1 card can be used in a x4, x8 or x16 slot.

Technical data

Connections and displays:

  • PCIe port:
    • PCIe 1.1 / "x1" connector
  • Serial port:
    • 2x RS232-, RS422-, RS485 interfaces, selectable
    • 9-pin SUB-D adapter
  • Operating modes:
    • RS232, RS422
    • RS485 2-/4-wire with handshake
    • RS485 2-/4-wire with automatic control
  • Maximum baud rate:
    • RS232: 1Mbaud
    • RS422, RS485: 3Mbaud
  • Data format:
    • any format
  • Signals:
    • RS232: RxD, TxD, RTS, CTS, DTR, DSR, DCD, RI
    • RS422: RxD, TxD, CTS, DTR (RTS)
    • RS485: RxD, TxD
  • Handshake:
    • No, RTS/CTS, Xon/Xoff
  • UART:
    • Oxford OXPCIe954 with 128 bytes FIFO
  • Galvanic isolation:
    • Isolation voltage min. 1kV DC
    • between PC and serial ports
  • Supply voltage:
    • 3.3V DC, 12V DC
  • Current consumption:
    • typ. 200mA @ 3.3V
    • typ. 100mA @ 12V

Housing and other data:

  • Dimensions:
    • 120 x 120mm (W x H)
  • Enclosure rating:
    • IP00
  • Weight:
    • approx. 100g
  • Ambient temperature:
    • Storage: -40..+70°C
    • Operating: 0..+70°C
  • Permissible relative humidity:
    • 5..95% RH, non-condensing
  • Scope of delivery:
    • PCIe card 2x RS232/RS422/RS485
    • Quick start manual
    • product CD with manual, German/English


*Net unit price for
commercial users
  • Mechanical Accessories

* Our offering is intended only for commercial users. We will be happy to refer private end customers to trading partners through whom our products can be purchased.