Epson TM-T20III Technical Reference Manual
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Epson TM-T20III Technical Reference Manual

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See also: User Manual , Technical Reference Manual
Technical Reference Guide
Product Overview
Describes features of the product.
Setup
Describes setup and installation of the product and
peripherals.
Advanced Usage
Describes advanced usage methods for the product.
Application Development Information
Describes how to control the printer and necessary
information when you develop applications.
Handling
Describes how to handle the product.
Replacement of the TM-T20II
Describes precautions for replacement.
Appendix
Describes general specifications and character code tables.
M00122200
Rev. A

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Summary of Contents for Epson TM-T20III

  • Page 1 Technical Reference Guide Product Overview Describes features of the product. Setup Describes setup and installation of the product and peripherals. Advanced Usage Describes advanced usage methods for the product. Application Development Information Describes how to control the printer and necessary information when you develop applications.
  • Page 2 • 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...

  • Page 3: For Safety

    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. •...

  • Page 4: Cautions

    • 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. WARNING • Do not use aerosol sprayers containing flammable gas inside or around this product. Doing so may cause fire.

  • Page 5: Note About Interference

    Seiko Epson Corporation. Open Source Software License This product uses open source software in addition to Epson proprietary software. For information of the open source software used in this product, see the following URL.

  • Page 6: About This Manual

    About this Manual Aim of the Manual This manual provides developers/engineers with all the necessary information for design, development and installation of a POS system, and also design and development of a printer application. Manual Content The manual is made up of the following sections: Chapter 1 Product Overview Chapter 2...

  • Page 7: Table Of Contents

    Contents ■ For Safety..........................3 Key to Symbols.................................. 3 Warnings ..................................... 3 Cautions....................................4 ■ Caution Labels........................4 ■ Restriction of Use........................4 ■ Note About Interference ......................5 Open Source Software License ........................... 5 ■ About this Manual .........................6 Aim of the Manual ................................6 Manual Content................................
  • Page 8 Setup ....................... 23 ■ Flow of Setup........................23 ■ Installing the Printer ......................24 Installing the Printer Vertically ..........................24 Hanging the Printer on a Wall............................25 ■ Adjusting the Roll Paper Near-End Sensor ..............27 ■ Connecting the AC adapter ....................28 Connecting Procedure ..............................28 ■...
  • Page 9 Application Development Information............62 ■ Controlling the Printer....................... 62 ePOS-Print XML................................62 ESC/POS.....................................62 ■ Controlling the Cash Drawer .................... 63 ■ Controlling the Optional External Buzzer ..............64 ■ Software ..........................65 Development Kits ................................65 Drivers ....................................66 Utilities ....................................67 Others....................................67 Download ..................................67 Handling ......................
  • Page 10 Environmental Conditions............................84 External Dimensions and Mass ..........................85 ■ Specifications of Interfaces and Connectors ..............86 USB Interface ...................................86 RS-232 Serial Interface ..............................87 Ethernet Interface ................................90 Wireless LAN Interface (when OT-WL06 is used) ....................92...

  • Page 11: Product Overview

    Chapter 1 Product Overview Product Overview This chapter describes features of the product. Features Printing • High speed receipt printing is possible (250 mm/s {9.84"/s} maximum). • Switching from 80 mm {3.15"} width paper printing to 58 mm {2.28"} width paper printing is available. Handling Easy drop-in paper loading Software...

  • Page 12: Product Configurations

    Chapter 1 Product Overview Product Configurations Models • Serial (RS-232C)/USB interface model • Ethernet interface model Accessories Included • Roll paper (for operation check) • Power switch cover • Soft power switch cover • Wall hanging bracket • Rubber feet for vertical installation •...

  • Page 13: Parts And Functions

    Chapter 1 Product Overview Parts and Functions Roll paper cover Open this cover to install/replace the roll paper. Manual cutter Use this cutter when you cut the roll paper manually. Cutter cover If the roll paper cover will not open due to a paper jam, open this cover and unlock the autocutter blade.

  • Page 14: Led Lights

    Chapter 1 Product Overview LED lights • On when the power supply is on. Power LED • Off when the power supply is off. Error LED Lights or flashes when the printer is offline. (For information about the lighting and flashing patterns, see "Status and Errors"...

  • Page 15: Connectors

    Chapter 1 Product Overview Connectors All connectors are located on the lower rear of the printer. • The interface installed differs according to the model. • Do not remove the user interface board installed on this product. Serial interface Connects the serial cable for connecting to a computer. USB (Type-B) connector Connects the USB cable for connecting to a computer.

  • Page 16: Status And Errors

    Chapter 1 Product Overview Status and Errors The LEDs light or flash to indicate the printer status. The printer cannot print while an error is left unsolved. Online and Offline Online The printer is online and ready for normal printing unless there is a reason to go offline. Offline The printer automatically goes offline under the following conditions: •...

  • Page 17: Recoverable Errors

    The error recovery command is valid only if a recoverable error (excluding automatically recoverable errors) occurs. Use the TM-T20III Utility to change the condition for recovery. For details, see the TM-T20III Utility User's Manual. Unrecoverable Errors The printer cannot print when an unrecoverable error occurs.

  • Page 18: Status Display

    Chapter 1 Product Overview Status Display Power LED Error LED Paper LED Online Initializing after power-on Running a self-test Waiting to continue self-test Flashing Feeding using the Feed button Waiting to execute a macro Flashing Roll paper cover open while the printer is not printing No paper While updating firmware...

  • Page 19: Nv Memory

    Use the TM-T20III Utility to register graphics. You can confirm the registered graphics in the NV graphics information print mode. • For detailed information about the Epson TM-T20III Utility, see the TM-T20III Utility User's Manual. • For information about how to use the NV graphics information print mode, see "NV Graphics...

  • Page 20: User-Defined Page

    Chapter 1 Product Overview User-defined Page You can store character data in the user-defined page (character code table: page 255) so that you can also print characters not resident in the printer. Maintenance Counter With this function, printer information, such as the number of lines printed, the number of autocuts, and printer operation time after the printer starts working, is automatically stored in NV memory.

  • Page 21: Simple Setup For Wireless Lan

    This allows you to easily setup a wireless LAN for the printer by using a printer settings tool (TM-T20III Utility, Epson TM Utility for iOS/Android, or EpsonNet Config) even without a network environment such as access points.

  • Page 22: Useful Functions For Smart Devices

    Specify the target printer using the acquired information to connect to the network. • To use the function, programming using Epson ePOS SDK is required. In addition to the QR code capturing operations, use Printer Easy Select API to achieve this function.

  • Page 23: Setup

    Chapter 2 Setup Setup This chapter describes setup and installation of the product and peripherals. Flow of Setup This chapter consists of the following sections along with the setup flow of the product and peripherals. Installing the Printer (page 24) Adjusting the Roll Paper Near-End Sensor (page 27) Connecting the AC adapter (page 28) Connecting the Printer to the Host (page 29)

  • Page 24: Installing The Printer

    Chapter 2 Setup Installing the Printer You can install the printer horizontally on a flat surface (with the paper exit on top) or vertically (with the paper exit at the front). Also, you can hang it on a wall using the included accessories. Horizontal installation Vertical installation Hanging on a wall...

  • Page 25: Hanging The Printer On A Wall

    Chapter 2 Setup Hanging the Printer on a Wall To securely hang the printer on a wall, follow the steps below. • Hang the printer on a wood, concrete, or metal wall. The thickness of the wall should be 10 mm {0.4"} or more.
  • Page 26 Chapter 2 Setup Align the holes in the wall hanging bracket with the screws on the wall, and hook it securely.

  • Page 27: Adjusting The Roll Paper Near-End Sensor

    Chapter 2 Setup Adjusting the Roll Paper Near-End Sensor Below are two situations where a roll paper near-end sensor adjustment is required. • To adjust the detection position to suit the diameter of the roll paper core used. • To adjust the detection position of remaining amount of paper. •...

  • Page 28: Connecting The Ac Adapter

    Chapter 2 Setup Connecting the AC adapter • Be sure to use the specified AC adapter [AC adapter, C1 (Model: M235B)]. Penetration by foreign objects may lead to fire. • Never insert the AC cable plug into a socket that does not meet the input voltage of the AC WARNING adapter.

  • Page 29: Connecting The Printer To The Host

    Chapter 2 Setup Connecting the Printer to the Host • Be sure to install the driver before connecting the printer to the host computer. • The printer uses a modular connector specifically designed for the cash drawer. Do not connect the connector to an ordinary telephone line.

  • Page 30: Ethernet Interface

    When setting up multiple printers, you can connect using a wired cable (LAN/USB) and setup a wireless LAN using the Epson Deployment Tool. Using Epson TM Utility for iOS/Android, you can easily connect the printer to the network from an iOS or Android devices.
  • Page 31 When connecting to the printer is complete, setup the Wireless LAN using the TM- T20III Utility or EpsonNet Config. For information about the TM-T20III Utility, see the TM-T20III Utility User's Manual. For details about EpsonNet Config, refer to EpsonNet Config User's Guide.
  • Page 32 If the printer is not displayed, press the “Add Port” button, and then add the printer connected by USB. Perform network I/F as well as TCP/IP settings. For details, see the TM-T20III Utility User's Manual. When you have finished making settings, disconnect the USB cable, turn off the printer, and then turn it back on.
  • Page 33 Necessary Items Prepare the following items. • Device for setting: iOS or Android device • Utility for setting: Epson TM Utility for iOS/Android Running Epson TM Utility for iOS/Android Run the Epson TM Utility for iOS/Android. Set from “Wi-Fi Setup Wizard” in the menu.

  • Page 34: Connecting The Cash Drawer

    • The cash drawer cannot be used If the enable/disable setting for the optional external buzzer is set to “enable”. When using the cash drawer, be sure to set it to “disable” using the Epson TM- T20III Utility.

  • Page 35: Connecting The Drawer Kick Cable

    Chapter 2 Setup Connecting the Drawer Kick Cable • Use a shield cable for the drawer kick cable. • When using cash drawer, make sure to use the power supply for printer (connector pins 4). • Do not insert a telephone line into the drawer kick connector. WARNING Doing so may damage the telephone line or printer.

  • Page 36: Connecting The Optional External Buzzer

    Settings for sound patterns and frequency depending on the occasions the buzzer beeps are also available. Use the TM-T20III Utility to make the buzzer settings: enable/disable setting, sound pattern setting, and frequency setting. • Be sure to turn off the printer before you connect/disconnect the optional external buzzer.
  • Page 37 Chapter 2 Setup Turn off the printer. Clean and dry the printer case where the buzzer will be installed. With 2 included pieces of the affixing tape combined, peel off the backing paper on one side, and stick the tape in the center of the attaching surface of the buzzer unit. Affixing tape Connect the cable of the buzzer to the drawer kick connector on the printer.

  • Page 38: Connecting The Optional Wireless Lan Unit

    Chapter 2 Setup Connecting the Optional Wireless LAN Unit The optional Wireless LAN cable set (OT-WL06) enables you to use the product with a Wi-Fi connection. For more information, refer to User’s Manual of the Wireless LAN cable set. • Be sure to turn off the printer when connecting the Wireless LAN unit. •...

  • Page 39: Attaching The Power Switch Cover

    Chapter 2 Setup Attaching the Power Switch Cover By attaching the power switch cover supplied, you can prevent accidental operations of the power switch. You can press the power switch by inserting a sharp-pointed object in the holes on the power switch cover. To detach the cover, use a sharp-pointed object.

  • Page 40: Changing The Paper Width

    Chapter 2 Setup Changing the Paper Width You can change the paper width from 80 to 58 mm {3.15 to 2.28"} by installing the included 58-mm {2.28"} width roll paper guide. Follow the steps below to change the paper width. Because some parts of the print head and the autocutter contact the platen and they may become worn out, once you change the paper width from 80 to 58 mm {3.15 to 2.28"} and use the printer, you cannot change it back to 80 mm {3.15"}.

  • Page 41: Advanced Usage

    With the memory switches and customized values, which are software settings for this printer, you can set the various functions. For an outline of the functions, see the following pages. Use the Epson TM-T20III Utility or Software Setting Mode to set the memory switches.

  • Page 42: Feature

    Chapter 3 Advanced Usage Item/Method Software Setting Mode Epson TM-T20III Utility ✔ Cut error release method ✔ Auto top logo printing ✔ Auto bottom logo printing ✔ Extended settings for auto top logo/bottom logo printing Feature Automatic line feed • Always disabled (default setting) •...
  • Page 43 Chapter 3 Advanced Usage Recovery conditions from receive buffer BUSY • Releases the BUSY state when the remaining receive buffer capacity reaches 256 bytes (default setting) • Releases the BUSY state when the remaining capacity of the receive buffer reaches 138 bytes. Receive buffer capacity •...
  • Page 44 Chapter 3 Advanced Usage Print speed Selectable from levels 1 to 13 (Slow ~ Fast) Default setting: Level 13 Depending on print conditions, such as print duty, thermal head temperature, and data transmission speed, print speed is automatically adjusted, which may cause white lines due to intermittent print (the motor sometimes stops).
  • Page 45 Character code table defaults Selectable from 43 pages including user-defined page Default setting: PC437: USA, Standard Europe Refer to the following URL regarding the character code table. www.epson-biz.com/pos/reference/charcode/ International character defaults Selectable from 18 sets Default setting: USA Font A auto replacement •...
  • Page 46 Chapter 3 Advanced Usage Sound pattern (Autocut) Selectable from Patterns A to E Default setting: Pattern A Buzzer frequency (Autocut) • Does not sound • Sounds 1 time (default setting) Sound pattern (Pulse 1) Selectable from Patterns A to E Default setting: Pattern A Buzzer frequency (Pulse 1) •...
  • Page 47 Chapter 3 Advanced Usage Serial Interface Communication Condition Baud rate • 2400 bps • 4800 bps • 9600 bps • 19200 bps • 38400 bps (default setting) • 57600 bps • 115200 bps Parity • No parity (default setting) • Odd parity •...
  • Page 48 Chapter 3 Advanced Usage Auto top logo printing TM-T20III Utility does not support the setting for the number of lines to be deleted below top logo. Key-code Selectable from key-codes of registered logos Alignment • Left • Center • Right...
  • Page 49 Chapter 3 Advanced Usage Extended settings for auto top logo/bottom logo printing TM-T20III Utility does not support the following settings. • Top logo print while paper feeding to the cutting position • Top logo print while clearing the buffer to recover from a recoverable error •...

  • Page 50: Setting/Checking Modes

    Chapter 3 Advanced Usage Setting/Checking Modes As well as print mode, the following modes are also provided for making various printer settings and checking items. • Self-test mode • NV graphics information print mode • Receipt Enhancement information print mode •...
  • Page 51 Chapter 3 Advanced Usage In (1) and (2), the following guidances are printed, the Paper LED flashes, and instructs the user's operations. 1. Continuing self-test guidance 2. Mode selection guidance...

  • Page 52: Self-Test Mode

    Chapter 3 Advanced Usage Self-test Mode You can check the following items using the self-test. • Product name • Firmware version • Product serial number • Interface information • Resident fonts • Maintenance counter information (print head running length, number of times of auto-cutting) Follow the steps below.

  • Page 53: Receipt Enhancement Information Print Mode

    Chapter 3 Advanced Usage After briefly (less than one second) pressing the Feed button once, hold it down for at least one second, to print the NV graphics information. After information printing, the Mode selection guidance is printed again. To finish, turn off the power, or select “Exit and Reboot Printer”. Receipt Enhancement Information Print Mode You can check the following items using the R/E information mode: •...
  • Page 54 Chapter 3 Advanced Usage Briefly press the Feed button three times (less than one second), hold it down for at least one second to enter the Software setting mode (Customized Value Settings). The Software setting mode guidance is printed, and the Paper LED flashes. Customize Value Settings Modes 0: Exit...

  • Page 55: Restore Default Values Mode

    Chapter 3 Advanced Usage Restore Default Values Mode In Restore default values mode, following values saved on NV Memory will be set back to default settings. When any error occurs, you can use to specify the reason. Restore Default Values Setting Contents Setting Items and Delete Defined Data...

  • Page 56: Interface Setup Mode

    Chapter 3 Advanced Usage Interface Setup Mode Use this mode to setup the interface and other settings. Follow the steps below. After running a self-test, hold down the Feed button for at least one second to enter the Mode selection. The Mode selection guidance is printed, and the Paper LED flashes.

  • Page 57: Peripheral Device Information Print Mode

    Chapter 3 Advanced Usage Peripheral Device Information Print Mode This function allows you to print information for the device (Wi-Fi adapter information) currently connected to the printer. Follow the steps below. After running a self-test, hold down the Feed button for at least one second to enter the Mode selection.

  • Page 58: Hexadecimal Dumping Mode

    Chapter 3 Advanced Usage Hexadecimal Dumping Mode In the hexadecimal dumping mode, the printer prints the data transmitted from a host computer in hexadecimal numbers and their corresponding characters. It enables you to check if data is transmitted to the printer correctly.

  • Page 59: Printing A Status Sheet

    Chapter 3 Advanced Usage Printing a Status Sheet Follow the steps below to check the interface settings. • When the power LED is flashing, wait until it remains lit to start printing. • This function is available only with the Ethernet interface model. Using the Status Sheet Button Only the content for the Ethernet and Wi-Fi interface are printed.
  • Page 60 Chapter 3 Advanced Usage Using the Feed button Content for the Ethernet, and Wi-Fi interface are printed. Check that the printer is turned on. Open the roll paper cover. Hold down the Feed button (for 1 seconds or longer). Close the roll paper cover. The status sheet is printed.

  • Page 61: Resetting The Interface Settings

    Chapter 3 Advanced Usage Resetting the Interface Settings Follow the steps below to reset the interface settings. • You can return the interface settings to their defaults from the Interface Setup mode. For details on the Interface Setup mode, see "Interface Setup Mode"...

  • Page 62: Application Development Information

    • Epson ePOS SDK ePOS-Print XML ePOS-Print XML is the Epson original control command system for POS printers defined in XML. With ePOS- Print XML commands, you can print in environments where http communication is available and from OS applications. For detailed information about ePOS-Print XML, see the ePOS-Print XML User's Manual.

  • Page 63: Controlling The Cash Drawer

    Register a cash drawer using the SetupPOS Utility, and control using the OpenDrawer method or the DirectIO function. For details, see the “EPSON OPOS ADK for .NET MANUAL Application Development Guide Cash Drawer (EPSON Standard)” and the “UnifiedPOS Specification”. Epson ePOS SDK The output command for the drawer kick pulse and the status transmission command are provided in each SDK library.

  • Page 64: Controlling The Optional External Buzzer

    POSPrinter (TM Series)”. OPOS for .NET Register a POS printer using the SetupPOS Utility and control using the DirectIO function. For details, see the “EPSON OPOS ADK for .NET MANUAL Application Development Guide POS Printer (TM-T20III)”. Epson ePOS SDK The command for the buzzer function is provided in each SDK library. For details, see the user's manuals provided with each SDK.

  • Page 65: Software

    When developing applications, use a separate development environment such as Microsoft Visual Studio .NET. EPSON JavaPOS ADK (Windows/Linux) JavaPOS is the standard specification which defines an architecture and device interface (API) to access various POS devices from a Java based system. Using JavaPOS standard API allows control with Java based applications of functions inherent to each device.

  • Page 66: Drivers

    In addition to ordinary Windows printer driver functions, this driver has Windows Printer Driver (APD) controls specific to POS. The Status API (Epson original DLL) that monitors printer status and sends ESC/POS commands is also attached to this driver. EPSON TM Virtual Port...

  • Page 67: Utilities

    TM printers at the same time. Epson Monitoring Tool Use to check a list of status for the Epson printers connected to the Windows network. You can also update certificates for multiple printers in a batch.

  • Page 68: Handling

    Chapter 5 Handling Handling This chapter describes basic handling of the printer. Installing and Replacing Roll Paper • Do not open the roll paper cover during printing. The printer may be damaged. • Do not touch the manual cutter with your hands when installing or replacing the roll paper. CAUTION Otherwise, you may be injured because the manual cutter blade is sharp.
  • Page 69 Chapter 5 Handling Install the roll paper in the correct direction. Pull out some roll paper, and close the roll paper cover.

  • Page 70: Removing Jammed Paper

    Chapter 5 Handling Removing Jammed Paper When a paper jam occurs, never pull out the paper forcibly. Open the roll paper cover, and then remove the jammed paper. Do not touch the thermal head. (See "Cleaning the Thermal Head/Platen Roller" on page 72.) After printing, the thermal head and its surroundings can be very hot.
  • Page 71 Chapter 5 Handling Turn the knob until you see a triangle in the opening. This returns the cutter blade to the normal position. Refer to the operation instructions engraved on the back of the cutter cover. Triangle Knob Close the cutter cover. Open the roll paper cover and remove the jammed paper.

  • Page 72: Cleaning The Printer

    Cleaning the Thermal Head/Platen Roller Epson recommends cleaning the thermal head periodically (generally every 3 months) to maintain receipt print quality. Depending on the roll paper used, paper dust may stick to the platen roller and cause an irregular paper feed.

  • Page 73: Preparing For Transport

    Chapter 5 Handling Preparing for Transport Follow the steps below to transport the printer. Turn off the printer. Ensure that the POWER LED has turned off. Disconnect the AC cable. Remove the roll paper. Pack the printer upright.

  • Page 74: Replacement Of The Tm-T20Ii

    Chapter 6 Replacement of the TM-T20II Replacement of the TM-T20II The TM-T20III is designed so that it can smoothly replace the TM-T20II. This chapter describes precautions for the replacement. Compatibility Printing The printing and character specifications are the same as those of the TM-T20II. Without special configurations, the TM-T20III prints the same results as the TM-T20II prints.

  • Page 75: Overall Dimensions

    Chapter 6 Replacement of the TM-T20II Overall Dimensions You can place the TM-T20III in the same location as the TM-T20II, since its overall dimensions and weight are almost the same as those of the TM-T20II. TM-T20III TM-T20II W:140 × D:199 × H:146 mm Approx. 1.7 kg W:140 ×...

  • Page 76: Appendix

    Appendix Appendix Product Specifications Printing method Thermal line printing Paper feed speed Approx. 250 mm/s {approx. 7.88"/s} (continuous paper feeding with the Feed button) Cutting Method Partial cut (cutting with one point at left uncut) Interface Serial/USB mode USB: USB 2.0 Full-speed (12 Mbps) Serial: RS-232 Wireless LAN: Connects an optional Wireless LAN unit to the USB connector.

  • Page 77: Printing Specifications

    Appendix Printing Specifications 80 mm {3.15"} width paper 58 mm {2.28"} width paper Printing method Thermal line printing Paper feed direction Unidirectional with friction feed Dot density 203 × 203 dpi Standard mode 72 mm {2.84"}, 576 dots 52.5 mm {2.07"}, 420 dots (default setting) Printable Area 42 column mode...

  • Page 78: Character Specifications

    1.76 × 4.26 mm {0.06 × 0.16"} 2.50 × 6.00 mm {0.10 × 0.24"} *: Space between characters is not included. Characters can be scaled up to 64 times as large as the standard size. Refer to the following URL regarding the character code table. www.epson-biz.com/pos/reference/charcode/...

  • Page 79: Paper Specifications

    Specified original paper type F5041(48), F5041(55) (Mitsubishi HiTec Paper Flensburg GmbH) KT55FA, KT48FA (Koehler Paper Group) Epson Certified Media List for Thermal Receipt Printers U www.epson-biz.com/?content=sht_tm_media • Paper must not be pasted to the roll paper spool. • For the best print quality for each paper type, it is recommended to set the print density. (See "Software Settings"...

  • Page 80: Printable Area

    Appendix Printable Area 80 mm {3.15"} width paper printing The maximum printable area of paper with a width of 79.5 ± 0.5 mm {3.13 ± 0.02"} is 72.1 ± 0.2 mm {2.84 ± 0.008"} (576 dots) and the approximate space is 3.0 mm {0.12"} on the left side on the left side and 4.5 mm {0.18"} on the right side.
  • Page 81 Appendix 58 mm {2.28"} width paper printing The maximum printable area of paper with a width of 57.5 ± 0.5 mm {2.26 ± 0.02"} is 52.6 ± 0.2 mm {2.07 ± 0.008"} (420 dots), and the approximate space is 3.0 mm {0.12"} on the left side and 2.0 mm {0.079"} on the right side.

  • Page 82: Printing And Cutting Positions

    Appendix Printing and Cutting Positions Manual cutter position Approx. 27.1 mm {1.07"} Approx. 10.5 mm Autocutter blade position {0.41"} Printable area Center of the print dotline Paper feed direction • The values above may vary slightly as a result of paper slack or variations in the paper. Take this into account when setting the cutting position of the autocutter.

  • Page 83: Electrical Characteristics

    Appendix Electrical Characteristics Supply voltage 24VDC ± 7% Rated current 1.5 A If printing is continuously performed with a high print ratio, the overcurrent protection may be activated and result in uneven print density or a low voltage error. Therefore, the printing length must not exceed the following values when printing with high print ratio.

  • Page 84: Environmental Conditions

    Acoustic noise (operating) Approx. 55 dB (bystander position) Note: The values above are measured in the Epson evaluation condition. Acoustic noise differs depending on the paper used, printing contents, and the setting values, such as print speed or print density.

  • Page 85: External Dimensions And Mass

    Appendix External Dimensions and Mass • Height: Approx. 146 mm {5.75"} • Width: Approx. 140 mm {5.51"} • Depth: Approx. 199 mm {7.83"} • Mass: Approx. 1.7 kg {3.31 lb} (excluding roll paper) 269.5 [Units: mm]...

  • Page 86: Specifications Of Interfaces And Connectors

    USB vendor-defined class USB printer class 04B8h 04B8h Vendor ID 0202h 0E28h Product ID Manufacturer EPSON EPSON Product TM-T20III TM-T20III String Descriptor Serial number Character string based on the Character string based on the product serial number product serial number...

  • Page 87: Rs-232 Serial Interface

    Appendix RS-232 Serial Interface Interface board specifications (RS-232-compliant) Item Specifications Data transfer method Serial Synchronization Asynchronous Handshaking Select one of the following in the software setting mode. • DTR/DSR • XON/XOFF Signal level MARK -3V to -15V logic “1”/OFF SPACE +3V to +15V logic “0”/ON Bit length Select one of the following in the software setting mode.
  • Page 88 Appendix Functions of each connector pin Signal Signal Pin no. Function name direction Frame ground Output Transmission data Input Reception data Output Equivalent to DTR signal (pin 20) Input This signal indicates whether the host computer can receive data. SPACE indicates that the host computer can receive data. MARK indicates that the host computer cannot receive data.
  • Page 89 Appendix XON/XOFF When XON/XOFF control is selected, the printer transmits the XON or XOFF signals as follows. The transmission timing differs, depending on the BUSY condition. BUSY condition Signal Printer status Receive buffer full/ Receive buffer full Offline When the printer goes online after turning on the power Transmit Transmit (or reset using the interface)

  • Page 90: Ethernet Interface

    Appendix Ethernet Interface Communication specifications 10BASE-T/100BASE-TX Support protocols Protocols Usage IP, ARP, ICMP, UDP, TCP Basic communication protocols LP, LPR Printing protocols TCP Socket Port Used to transfer printing data and printer status via (bidirectional) direct socket communication. HTTP/HTTPS Used by browsers to display and set module status SNMP Used by dedicated and general MIB tools to acquire and set module and printer status...
  • Page 91 Appendix Network parameters Item Default settings IP Address 192.168.192.168 Subnet mask 255.255.255.0 Default gateway 0.0.0.0 IP address acquisition Automatic APIPA Disabled arp/ping Disabled IP Address Printing Enabled Socket Timeout 90 seconds Standard Community Name (Read Only) "public" Community name (Read Only) Community name (Read/Write) SNMP IP Trap 1 Disabled...

  • Page 92: Wireless Lan Interface (When Ot-Wl06 Is Used)

    Appendix Wireless LAN Interface (when OT-WL06 is used) When using wireless LAN, make sure you disconnect the LAN cable. If a LAN cable is connected, wireless LAN is disabled. Specifications • IEEE802.11b/g/n (2.4 GHz band) or IEEE802.11a/b/g/n (2.4 GHz or 5 GHz band) compliant •...
  • Page 93 Appendix Settings in Standard Mode Parameter Default setting Communication standard 802.11b/g/n Network mode Infrastructure mode SSID EPSON_Printer Encryption type WPA2-PSK Passphrase EpsonNet IP Address Automatically acquired by DHCP Printing communication protocol • LP, LPR: Transfers printing data • TCP Socket Port: Transfers printing data and printer status via bidirectional direct socket communication. LP, LPR •...
  • Page 94 Appendix Notes on Wi-Fi connection Because not all the combinations of the printer and Wireless LAN units have been checked for operation, the operation of the printer in combination with all the Wireless LAN units is not guaranteed. Especially in the adhoc mode, the printer may not operate normally, depending on the combination of the device to connect with.

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