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 <> 20mA S5 interface cable, 4.0kV isolated

Serial Interface - with 4kV isolation

The Interface connects devices equipped with an RS232 interface to active 20mA components. The conversion is accomplished without the need for a dedicated power source.



  • 1 x RS232
    • 9-pin Sub-D female
  • 1x 20mA (passive)
    • 15-pin Sub-D male
    • Alternate designations: Current loop, TTY, line current interface
  • Plug compatible to Siemens S5 <> PC connection

Management and Connectivity:

  • Galvanic isolation with an insulation voltage of 4kV
  • Isolator integrated into connecting cable
  • No setting of the transmission parameters necessary
  • No external power supply required

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 A:
    • RS232 Interface
    • 9-pin SUB-D female, plug-ready for PC
    • 2 meters cable
  • Serial Port B:
    • 20mA interface
    • 15-pin SUB-D male, connector-compatible with Siemens S5
    • 2 meters cable
  • Data format:
    • any format
  • Supported signals:
    • RxD, TxD
  • Isolation:
    • min. 4kV RMS
  • Baud rate:
    • 1200 to 57,600 baud
  • Power supply:
    • from the RS232 and 20mA signals, no power supply required

Housing and other data:

  • Housing:
    • Plastic compact housing, 55 x 30 x 16mm
  • Weight:
    • approx. 120g
  • Scope of delivery:
    • Interface Cable S5 RS232 <> 20mA
    • Mini Gender Changer, #11570

* 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.