W&T connects
Interfaces for TCP/IP, Ethernet, RS-232, RS-485, USB, 20mA, glass and plastic fiber optic cable, http, SNMP, OPC, Modbus TCP, I/O digital, I/O analog, ISA, PCI
Data sheet:

Serial PCI base board, 1kV isolated

  • Serial PCI base board, 1kV isolated

Two additional serial ports for stationary PCs

The PCI Base Board 13021 together with W&T interface modules expand your PC with two isolated serial interfaces. The respective interface type can be freely chosen by using the appropriate interface module. This makes it possible to equip the PC with various interfaces without having to use multiple cards.



  • 2x serial TTL interfaces with galvanic isolation
  • 1x 32-bit PCI bus
    • for 3.3V & 5V PCI systems
  • Galvanic isolation between PC, Port 1 and Port 2
    • Isolation voltage 1kV

Management and connectivity:

  • 20mA, RS232, RS422, RS485 and profibus can be combined on one card
  • Dual UART PI7C8952 with 128 byte FIFO
  • Plug-and-play: automatic configuration of base address and interrupt

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

There are many cases where it is necessary to equip the ports of an interface card with different port models. It may for example be necessary to use COM1 as a 20mA programming interface for a PLC, as the software used only supports this port, while COM2 is connected to an RS232 terminal device.

For such requirements, W&T provides a very smart solution without any need for additional external hardware. The module concept of the serial W&T PC cards allow you to freely select the interface model, as the PC card mainboard is equipped with pluggable modules that convert the internal TTL signals into interface signals.

The combined interface cards are supplied fully configured according to your specifications and are ready for installation. You can change a built-in port at any time by simply replacing the interface module.

Technical data

Connections and displays:

  • System bus:
    • 32-bit PCI bus / 33MHz / Universal Voltage
  • Serial port:
    • 2x galvanically isolated slots for interface modules
  • Operating modes:
    • Different interface types possible
  • Maximum baud rate:
    • 460.800 kbaud
  • Data format:
    • any format
  • Signals:
  • Handshake:
    • No, RTS/CTS, Xon/Xoff
  • UART:
    • PI7C8952 with 128-byte FIFO
  • Galvanic isolation:
    • Isolation voltage min. 1kV DC
    • between PC and the serial ports 1 and 2
  • Supply voltage:
    • 3.3V DC, 5V DC, 12V DC
  • Current consumption:
    • typ. 200mA @ 3.3V
    • typ. 200mA @ 5V
    • typ. 100mA @ 12V

Housing and other data:

  • Dimensions:
    • 134 x 120mm (W x H)
  • Enclosure rating:
    • IP00
  • Weight:
    • approx. 105g
  • Ambient temperature:
    • Storage: -40..+70°C
    • Operating: 0..+70°C
  • Permissible relative humidity:
    • 5..95% RH, non-condensing
  • Scope of delivery:
    • serial PCI base board
    • slot plate
    • Quick start manual


*Net unit price for
commercial users
  • Additive modules

    • RS232/RS422/RS485 interface module, 5V technology
    • 18813
    • 55.00€
    • RS232 DTE interface module
    • 18811
    • 41.00€
    • 20mA interface module (5V and 12V)
    • 18411
    • 55.00€
    • RS422/RS485 interface module
    • 18611
    • 55.00€
    • Profibus interface module
    • 18612
    • 49.00€

* 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.