User's Manual

Chapter 1
INTRODUCTION
The DOTR-221 module is a compact UHF RFID reader module which is
compliant with the ISO-18006C (EPC class1 Gen2) protocol. It is intended to
be used in conjunction with the accompanying antenna and a host computer
(not supplied). The small physical size allows the module to be easily
integrated with a mobile host computer, such as a Personal Digital Assistant.
The module is designed to be operated off a single cell lithium ion battery, and
has two host interface options: USB and UART.
WARNING
1. ESD precautions: This module contains electrostatic sensitive components.
Handle the product at a static-free workstation, and wear a static grounding
strap always. Observe standard ESD precautions.
2. This module does not contain fuses or other protective devices. Be extra
careful when applying power to make sure voltage and polarity are correct.
3. Do not attempt to open the cover. There are no serviceable parts inside.
4. Provide good thermal conduction of the module or good ventilation around
the module. As the module consumes around 4 watts of power, it can be hot
when operated continuously. Adequate cooling should be provided to ensure
reliability.
5. Do not operate the product in an explosive atmosphere or in the presence of
flammable gases or fumes.