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:

RS232 Universal Serial T-Switch

  • RS232 Universal Serial T-Switch

Connecting three serial terminal devices

The Universal Serial T-Switch enables practically any imaginable uni- or bi-directional connection of three serial terminal devices. The T-switch has three serial terminals, each of which can be freely configured.



  • 3x RS232/422/485, 9-pin SUB-D connector

Management and connectivity:

  • Operating modes:
    • Changeover using control sequences:
      • 1 computer runs for example two serial devices
    • time-controlled switching with adjustable switch time:
      • 2 computers share for example one serial terminal device:
      • Printer, plotter, hand scanner, card reader, etc...
  • No manual intervention necessary
  • Data back channel allows connection of bi-directional peripheral devices
  • Individual configuration of interfaces
  • Conversion of baud rate, data format and handshake protocol possible
  • Integrated diagnostic and startup aid: Setting dump

Power supply:

  • External power
    • Wide voltage range up to 24V

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

Notes on use:

The W&T RS232 Universal Serial T-Switch is an extremely versatile device. Virtually any uni- or bi-directional 2:1 coupling of RS232 devices is possible with this switch.

The Adapter has 3 serial ports: 1 Master port "C" and 2 Slave ports "A" and "B". Each of these ports can be parameterised independently of the others.

The Switch supports 4 data channels (Master C <> Slave A, Master C <> B), which are equipped in each direction with 1 MB buffers. The channels are switched either timed or using control sequences from one of the three Switch ports.

RS232 Universal Serial T-Switch

Technical data

Connections and displays:

  • Serial ports:
    • 3x RS232/422/485 (Port A, B and C: plug)
    • all ports can be configured independently of each other
  • Supported signals:
    • RxD, TxD, CTS, DTR
  • Baud rate:
    • 150..115,200 baud
  • Data format:
    • 7,8 data bits, no,even,odd parity
  • Flow control:
    • Hardware handshake or
    • XON/XOFF protocol
  • Integrated buffer:
    • 4 MB
  • Operating modes:
    • Switching via control sequence
    • time-controlled switching
  • Switching times:
    • Adjustable in increments of 5, 15, 30, 120 seconds
    • (other values on request)
  • Power supply:
    • 12..24V DC/AC
  • Current consumption:
    • Typ. 30 mA at 24V DC
  • Supply voltage connection:
    • Plug-in screw terminal, 5.08mm spacing
    • Labeled "L+" and "M"

Housing and other data:

  • Housing:
    • Plastic housing, 105 x 75 x 45mm
  • Weight:
    • approx. 150g
  • Ambient temperature:
    • Storage: -40..+70°C, Operation: 0..+60°C
  • Permissible relative humidity:
    • 0..95% RH (non-condensing)
  • Scope of delivery:
    • 1 x Universal Serial T-Switch, 4 MByte Buffer