TEL-SERX4 technical documentation

From fit-PC wiki
Revision as of 07:48, 11 October 2020 by Andrew (Talk | contribs) (Configuration)

Jump to: navigation, search

Compulab part number



TEL-SERDB9 Provides USB to Multiprotocol(RS-232, RS-485-Half Duplex, RS485-Full Duplex) serial connection (up to 4 Ports per TEL).

  • Simple USB Connection protocol
  • Supports Multiprotocol implementation on one DB9 Connector.
  • Individually enabled between RS-232 or RS485 ports.
  • Build-in Termination resistor.
  • Protocol switching using Onboard switches or using I2C expander

USB <--> USB HUB <---> RS-232 / RS-485 - Native DB-9 Port
                       RS-232 / RS-485 
                       RS-232 / RS-485
                       RS-232 / RS-485
RS-485 - Globally enable Termination resistor. - User Switchable
       - Globally Switched Between Half Duplex and Full-Duplex mode. - User Switchable

TEL-SERDB9 is utilizing a USB2 interface Multiple TEL-SERDB9 cards can be installed in a system


  • Serial through DB-9 Connector
  • Implemented using FTDI FT4232H


  • Windows and Linux support
    • Driverless operation in Windows & Linux
    • USB native device in Linux

Electrical and environmental

  • Ambient Operation from –40°C to 85°C.


  • Two Configuration method of the device
    • Onboard switches
  SW1 - PORTA: ON->RS-232 OFF->RS-485 - Native on board Port
  SW2 - PORTB: ON->RS-232 OFF->RS-485
  SW3 - PORTC: ON->RS-232 OFF->RS-485
  SW4 - PORTD: ON->RS-232 OFF->RS-485
  SW7 - ON->RS-485 Half Duplex OFF->RS-485 Full-Duplex      - Port A-D
  SW5 - ON->Enables Termination resistor RS-485-Half Duplex - Port A-D
  SW6 - ON->Enables Termination Resistor RS-485-Full Duplex - Port A-D 
    • I2C GPIO expander that is located on I2C address 0X27.

Open source hardware and software

  • Complete hardware design files are available
  • Complete firmware is available
  • Designed for Hacking - Easily scriptable Python SW library for easy and cross-platform communication to the device

Connection requirements

Host interface


Physical connection


Version information

Latest HW Version Rev 1.0

Block diagram

TEL-CANBUS Rev.1.0 block Diagram.jpg

Mechanical model

ToDo: Add 3D model

Hardware design files

ToDo: Add Gerbers 
ToDo: Add Schematics

Software source files

ToDo add files