ISOLATED 2 Channel TTL Serial Adapter - ISO244B

Name: ISOLATED 2 Channel TTL Serial Adapter - ISO244B
SKU: 11891
Price: 2.00 USD
Availability: InStock

TTL galvanic isolator for serial TX/RX lines 19200 baud maximum speed

Designed by TUTAN in Canada

ISOLATED 2 Channel TTL Serial Adapter - ISO244B 1

ISOLATED 2 Channel TTL Serial Adapter - ISO244B 2

ISOLATED 2 Channel TTL Serial Adapter - ISO244B 3

ISOLATED 2 Channel TTL Serial Adapter - ISO244B 4

ISOLATED 2 Channel TTL Serial Adapter - ISO244B 5

ISOLATED 2 Channel TTL Serial Adapter - ISO244B 6

ISOLATED 2 Channel TTL Serial Adapter - ISO244B 7

ISOLATED 2 Channel TTL Serial Adapter - ISO244B 8

$2.00

Quantity*

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VERSION*

FTDI SIDE TERMINALS

Select the type of terminal installed in the FTDI side. Only appplies to FULLY ASSEMBLED VERSION.

TARGET SIDE TERMINALS

Select the type of terminal installed in the TARGET side. Only applies to FULLY ASSEMBLED VERSION.

EXTRAS

You may add some screw terminals to your order. This option can be added to all versions but makes sense only for the KIT.

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Small devices for small projects at affordable prices.

TTL galvanic isolator for serial TX/RX lines 19200 baud maximum speed

What is it? This is a simple board to provide galvanic isolation between a standard FTDI BOB with 6 pins and a target device with a maximun speed of 19200 bauds. Only the TX/RX lines are isolated, th…

What is it?

This is a simple board to provide galvanic isolation between a standard FTDI BOB with 6 pins and a target device with a maximun speed of 19200 bauds. Only the TX/RX lines are isolated, thus it is not intended for program downloading that requires the DTR line to reset the MCU and higher speed (typically 115200 baud for Arduino boards).

Why did you make it?

In many fixed installations the processor and the user interface are connected using a serial link (i.e. Arduino Firmata). The serial cable is permanently connected to both ends that can be separated by several meters. In noisy environments this may affect the reliability of the devices including the possible failure created by power spikes, ground potentials and other disturbances.

The purpose of this board is to avoid those potential problems using opto-couplers to provide galvanic separation between host and target.

What makes it special?

The simplicity of this board allows a low-cost approach alternative to other commercial products, making it affordable for DIY fans. In addition to that the board is quite flexible regarding the type and placement of the connectors, making it easy to adapt to different requirements.

Versions

The board can be purchased in several versions:

BARE BOARD - You need to supply all necessary components based on the BOM and Electrical Drawing that can be downloaded at the bottom of this page.
KIT - In addition to the board, all components are included. Optionally you may add screw terminals.
FULL - Board fully populated and assembled. Choose the terminal type to install at each side of the board.

Terminal Blocks

If you prefer screw terminal blocks you may chose between two standard sizes (0.1"" and 0.2"). Note that each type has a different placement in the board, as indicated in the pictures.

How to order

Select the version (BARE, KIT, FULLY ASSEMBLED).
For the KIT version you may optionally add screw terminal blocks either 0.1" or 0.2" size.
For FULLY ASSEMBLED versions please select the desired placement of terminals for both the FTDI side (6 pos) and the TARGET side (4 pos). The EXAMPLE pictures illustrate some of the possible combinations (16 in total).