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Operating Instructions
Mini-USB to UART Converter
Item No. 2207472
Intended Use
This product serves to connect a device with a UART interface to a USB port (USB1.1 or
USB2.0). The converter can convert interfaces with a TTL level (5V) and 3.3Volt level to USB.
The converter circuit board is welded directly or through a socket rail e.g. to a conductor plate
or contacted via a socket rail (grid size 2.54 mm).
It is intended for indoor use only. Do not use it outdoors. Contact with moisture, e.g. in
bathrooms, must be avoided under all circumstances.
For safety and approval purposes, you must not rebuild and/or modify this product. If you use
the product for purposes other than those described above, the product may be damaged. In
addition, improper use can result in short circuits, fires or other hazards. Read the instructions
carefully and store them in a safe place. Make this product available to third parties only
together with its operating instructions.
This product complies with the statutory national and European requirements. All company
names and product names are trademarks of their respective owners. All rights reserved.
Delivery Content
• Mini-USB to UART Converter
• CD with driver
• Operating instructions
Up-to-date Operating Instructions
Download the latest operating instructions at www.conrad.com/downloads or
scan the QR code shown. Follow the instructions on the website.
Explanation of Symbols
The symbol with the exclamation mark in the triangle is used to indicate important
information in these operating instructions. Always read this information carefully.
The arrow symbol indicates special information and advice on operation.
Safety Instructions
Read the operating instructions carefully and especially observe the safety
information. If you do not follow the safety instructions and information
on proper handling in this manual, we assume no liability for any resulting
personal injury or damage to property. Such cases will invalidate the
warranty/guarantee.
a) General Information
• The device is not a toy. Keep it out of the reach of children and pets.
• Do not leave packaging material lying around carelessly. This may become
dangerous playing material for children.
• Protect the appliance from extreme temperatures, direct sunlight, strong jolts, high
humidity, moisture, flammable gases, steam and solvents.
• Do not place the product under any mechanical stress.
• If it is no longer possible to operate the product safely, take it out of operation and
protect it from any accidental use. Safe operation can no longer be guaranteed
if the product:
- is visibly damaged,
- is no longer working properly,
- has been stored for extended periods in poor ambient conditions or
- has been subjected to any serious transport-related stresses.
• Please handle the product carefully. Jolts, impacts or a fall even from a low height
can damage the product.
• Consult an expert when in doubt about the operation, safety or connection of the
appliance.
• Maintenance, modifications and repairs must only be completed by a technician
or an authorised repair centre.
• If you have questions which remain unanswered by these operating instructions,
contact our technical support service or other technical personnel.
b) Connected devices
• Also observe the safety and operating instructions of any other devices which are
connected to the product.
All manuals and user guides at all-guides.com
Operation
a) Pin assignment
Signal Level 3.3V
3.3V and 5V Levels
There is a 3.3V level (TxD) at pin X2. If your application requires a TTL level (5V), you need to
connect pin X2 to pin X1. Then you can get the TTL level from pin X4 (TxD_5V).
The RxD pin X3 can always process signals between 3V and 5V. It is not dependent on the
TxD driver wiring!
b) Software Installation
Care and Cleaning
• Disconnect the product from the mains before each cleaning.
• Do not use any aggressive cleaning agents, rubbing alcohol or other chemical solutions as
• Clean the product with a dry, fibre-free cloth.
Disposal
Product
You thus fulfill your statutory obligations and contribute to the protection of the environment.
Technical Data
Supply voltage ..........................................................+5V/DC via USB
Power input depending on baud rate ........................Max. approx. 100 mA
TTL-TxD level ...........................................................Between 4.5V and USB-Vcc
Permissible ambient temperature .............................0°C to +60°C
Permissible relative moisture ....................................20 to 80%, non-condensing
Dimensions ...............................................................approx. 18 x 16 x 15 mm
Pin Number
Description
x1
TTL Driver input (connect to GND when not used!)
x2
TxD 3.3Volt
x3
RxD
x4
TxD 5Volt TTL
x5
GND
x6
VBUS USB-Power Output +5Volt/ 100mA
When the TTL driver is not required, connect pin X1 to GND!
When connecting a USB connection cable, make sure that the cable connections
are established correctly. In case of polarity reversal, not only the converter is
destroyed but also the corresponding USB port. Loss of warranty/guarantee!
First install the enclosed driver software!
Then connect the converter to the USB port.
they can cause damage to the housing and malfunctioning.
Electronic devices are recyclable waste and must not be disposed of in the
household waste. At the end of its service life, dispose of the product in accordance
with applicable regulatory guidelines.
This is a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1, D-92240 Hirschau (www.conrad.com). All rights
including translation reserved. Reproduction by any method, e.g. photocopy, microfilming, or the capture in electronic data
processing systems require the prior written approval by the editor. Reprinting, also in part, is prohibited. This publication
represent the technical status at the time of printing.
Copyright 2020 by Conrad Electronic SE.
Signal Level 3.3V
*2207472_V1_0120_02_mxs_m_en
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