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:

20mA > Centronics interface, 1+1 Kbytes

  • Interface 20mA Centronics

Use Centronics printers on a TTY interface

The model 42009 Interface connects parallel printers or plotters to any 20mA data sources. The current loop interface can be operated active or passive, and the mode set individually for each of the two loops.



  • 1x 20mA
    • 25-pin SUB-D socket
  • 1 x Centronics
    • 36-pin plug integrated in interface housing

Management and connectivity:

  • Convenient startup
    • Automatic detection of the RS232 parameters
  • Connect Centronics printers to industrial interfaces
    • Makes expensive special printers unnecessary
  • Interface for all purposes
    • Baud rates from 300 to 19200 baud
    • Electronic system discretely secured in the adapter housing of the printer cable
    • Large safety fifo for slow handshake procedures
    • Integrated print data buffer

Power supply:

  • External
    • via supplied AC adapter (only with Euro plug)

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

Technical data

Connections and displays:

  • Serial port:
    • 20mA interface
    • 25-pin SUB-D adapter
    • incl. 2m connection cable on device
  • Parallel port:
    • 36-pin Centronics plug, interface
    • Can be plugged directly to the printer
  • Baud rate:
    • 300 .. 19,200 baud
  • Data format:
    • 7, 8 data bits, No, Even, Odd Parity
  • Handshake:
    • DTR, XON/XOFF handshake
  • Buffer:
    • 2kB (1kB + 1kB overflow buffer)
  • Operating modes:
    • active or passive mode of
    • transmission and reception loop
  • Supply voltage:
    • Supplied power adapter
  • Current consumption:
    • approx. 75mA

Housing and other data:

  • Housing:
    • Plastic housing, 75 x 61 x 20mm (L x W x H)
  • Enclosure rating:
    • IP20
  • Weight:
    • 425g incl. power adapter
  • Scope of delivery:
    • Interface 20mA > Centronics
    • AC adapter for office use (only with Euro plug)

* 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.