TM-T20 Technical Reference Guide (EN)

Technical Reference Guide Describes features and general specifications for the product. Describes setup and installation of the product and peripherals. Describes how to control the printer and necessary information when you develop applications. Describes how to handle the product. Describes interfaces, connectors, and character code tables. M00028504 Rev. D Product Overview Setup Application Development Information Handling Appendix

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Cautions • No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of Seiko Epson Corporation. • The contents of this document are subject to change without notice. Please contact us for the latest information. • While every precaution has been taken in the preparation of this document, Seiko Epson Corpora- tion assumes no responsibility for errors or omissions. • Neither is any liability assumed for damages resulting from the use of the information contained herein.

• Neither Seiko Epson Corporation nor its affiliates shall be liable to the purchaser of this product or third parties for damages, losses, costs, or expenses incurred by the purchaser or third parties as a result of: accident, misuse, or abuse of this product or unauthorized modifications, repairs, or alterations to this product, or (excluding the U.S.) failure to strictly comply with Seiko Epson Corporation’s operating and maintenance instructions.

• Seiko Epson Corporation shall not be liable against any damages or problems arising from the use of any options or any consumable products other than those designated as Original EPSON Products or EPSON Approved Products by Seiko Epson Corporation. Trademarks EPSON and ESC/POS are registered trademarks of Seiko Epson Corporation in Japan and other countries/regions. Microsoft and Windows are registered trademarks of Microsoft Corporation. All other trademarks are the property of their respective owners and used for identification purpose only. ESC/POS ® Command System EPSON ESC/POS is a proprietary POS printer command system that includes patented or patent- pending commands.

ESC/POS is compatible with most EPSON POS printers and displays. ESC/POS is designed to reduce the processing load on the host computer in POS environments. It comprises a set of highly functional and efficient commands and also offers the flexibility to easily make future upgrades. ©Seiko Epson Corporation 2011-2020. All rights reserved. 2

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Key to Symbols

For Safety Key to Symbols The symbols in this manual are identified by their level of importance, as defined below. Read the following carefully before handling the product. You must follow warnings carefully to avoid serious bodily injury. WARNING Provides information that must be observed to prevent damage to the equipment or loss of data. • Possibility of sustaining physical injuries. • Possibility of causing physical damage. • Possibility of causing information loss. CAUTION Provides information that must be observed to avoid damage to your equipment or a malfunction. Provides important information and useful tips. 3

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Warnings

Warnings • To avoid risk of electric shock, do not set up this product or handle cables during a thunderstorm • Never insert or disconnect the power plug with wet hands. Doing so may result in severe shock. • Handle the power cable with care. Improper handling may lead to fire or electric shock. ∗ Do not modify or attempt to repair the cable. ∗ Do not place any heavy object on top of the cable. ∗ Avoid excessive bending, twisting, and pulling. ∗ Do not place the cable near heating equipment. ∗ Check that the plug is clean before plugging it in. ∗ Be sure to push the plug all the way in. • Be sure to use the specified power source.

Connection to an improper power source may cause fire or shock. • Do not place multiple loads on the power outlet. Overloading the outlet may lead to fire. • Shut down your equipment immediately if it produces smoke, a strange odor, or unusual noise . Continued use may lead to fire. Immediately unplug the equipment and contact qualified service personnel. • Never attempt to repair this product yourself. Improper repair work can be dangerous. • Never disassemble or modify this product. Tampering with this product may result in injury or fire. • Do not allow foreign matter to fall into the equipment. Penetration by foreign objects may lead to fire.

• If water or other liquid spills into this equipment, do not continue to use it. Continued use may lead to fire. Unplug the power cord immediately and contact qualified service personnel. • Do not use aerosol sprayers containing flammable gas inside or around this product. Doing so may cause fire. WARNING 4

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