SII SLP720RT Series User manual

USER'S GUIDE
Thermal Printer
SLP720RT SERIES
Read this USER'S GUIDE carefully before using the printer.
Keep this USER'S GUIDE in a place where it can be accessed
quickly.

Rev.01 May 2022
Copyright 2022 by Seiko Instruments Inc.
All rights reserved.
The information contained herein is the property of SII and shall not be reproduced in whole or in part without prior written
approval of SII.
SII reserves the right to make changes in the specifications and materials contained herein without notice and shall not be
responsible for any damages (including consequential) caused by reliance on the materials presented, including but not
limited to typographical, arithmetic, and listing errors.
This product is developed as a product for industrial equipment use.
is a trademark of Seiko Instruments Inc.
AndroidTM is a trademark of Google LLC.
IOS is a trademark or registered trademark of Cisco in the U.S. and other countries and is used under license.
All other trademarks are the properties of their respective companies.
Applicable EC Directive and Standards
Product: Thermal Printer SLP720RT (Model with WLAN) (with AC adapter PW-H2415-W1)
Directive: Title
2014/53/EU Radio Equipment Directive
2009/125/EC Directive on Eco-Design of Energy-related Products
2011/65/EU (Commission Delegated Directive (EU) 2015/863)
Restriction of the use of certain hazardous substances (RoHS) Directive
Standards
EN 301 489-1
EN 301 489-17
EN 300 328
EN 62368-1
EN IEC 63000
EN 623111
Restrictions: This product is for use only with nominal voltage in each country.
Product: Thermal Printer SLP720RT (with AC adapter PW-H2415-W1)
Directive: Title
2014/30/EU EC Electromagnetic Compatibility Directive
2014/35/EU EC Low Voltage Directive (with AC adapter only)
2009/125/EC Directive on Eco-Design of Energy-related Products
2011/65/EU (Commission Delegated Directive (EU) 2015/863)
Restriction of the use of certain hazardous substances (RoHS) Directive
Standards
EN 55032
EN 61000-3-2
EN 61000-3-3
EN 55035
EN 62368-1 (with AC adapter only)
EN IEC 63000

Product: AC adapter PW-H2415-W1
Directive: Title
2014/30/EU EC Electromagnetic Compatibility Directive
2014/35/EU EC Low Voltage Directive
2009/125/EC Directive on Eco-Design of Energy-related Products
2011/65/EU (Commission Delegated Directive (EU) 2015/863)
Restriction of the use of certain hazardous substances (RoHS) Directive
Standards
EN 55032
EN IEC 61000-3-2
EN 61000-3-3
EN 55035
EN 62368-1
EN IEC 63000
Applicable UK Directive and Standards
Product: Thermal Printer SLP720RT (Model with WLAN) (with AC adapter PW-H2415-W1)
Directive:
Radio Equipment Regulations 2017
The Ecodesign for Energy-Related Products and Energy Information (Amendment) (EU Exit) Regulations 2019
The Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Regulations
2012
Standards
BS EN 301 489-1
BS EN 301 489-17
BS EN 300 328
BS EN 62368-1
BS EN IEC 63000
BS EN 623111
Restrictions: This product is for use only with nominal voltage in each country.
Product: Thermal Printer SLP720RT (with AC adapter PW-H2415-W1)
Directive:
Electromagnetic Compatibility Regulations 2016
Electrical Equipment (Safety) Regulations 2016
The Ecodesign for Energy-Related Products and Energy Information (Amendment) (EU Exit) Regulations 2019
The Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Regulations
2012
Standards
BS EN 55032
BS EN 61000-3-2
BS EN 61000-3-3
BS EN 55035
BS EN 62368-1 (with AC adapter only)
BS EN IEC 63000
Product: AC adapter PW-H2415-W1
Directive:
Radio Equipment Regulations 2017
Electrical Equipment (Safety) Regulations 2016
The Ecodesign for Energy-Related Products and Energy Information (Amendment) (EU Exit) Regulations 2019
The Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Regulations
2012

Standards
BS EN 55032
BS EN IEC 61000-3-2
BS EN 61000-3-3
BS EN 55035
BS EN 62368-1
BS EN IEC 63000
FCC Compliance Statement
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference
to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged
to try to correct the interference by one or more of the following measures:
Reorient or relocate the receive antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
Changes or modifications not expressly approved by Seiko Instruments could void the user's authority to operate the
equipment.
Industry Canada (IC) compliance statement
This device complies with Industry Canada's license-exempt RSSs.
Operation is subject to the following two conditions:
(1) this device may not cause interference; and
(2) this device must accept any interference, including interference that may cause undesired operation of the device.

1
1. INTRODUCTION
This manual describes how to handle SLP720RT series thermal printer (hereinafter referred to as
printer), AC adapter and AC cable.
Read through "2. SAFETY PRECAUTIONS" and "3. OPERATING PRECAUTIONS" carefully before
using the products, and handle them safely and properly.
Keep this manual in a place where it can be accessed quickly.
This manual consists of the following sections.
1. INTRODUCTION ...........................................................................................................1
2. SAFETY PRECAUTIONS..............................................................................................2
3. OPERATING PRECAUTIONS.......................................................................................5
4. PREPARATION..............................................................................................................8
5. IDENTIFYING MODEL TYPE........................................................................................9
6. EACH PART OF PRINTER..........................................................................................10
7. POWER CONNECTION..............................................................................................14
8. LOADING THERMAL PAPER .....................................................................................15
9. PREVENTION AND TREATMENT OF PAPER JAM...................................................20
10. TEST PRINT................................................................................................................22
11. FUNCTION SETTINGS ...............................................................................................25
12. CONNECTING TO HOST DEVICE.............................................................................28
13. PRINTER MAINTENANCE..........................................................................................31
14. TROUBLESHOOTING ................................................................................................32
15. SPECIFICATIONS .......................................................................................................33
16. ACCESSORIES AND CONSUMABLE PARTS...........................................................36
17. MS SETTINGS LIST....................................................................................................37

2
2. SAFETY PRECAUTIONS
In this SAFETY PRECAUTIONS, the following symbols are used to ensure safe and proper use of
products and prevent from damaging devices.
WARNING Failure to follow the instructions marked with this symbol could
result in severe personal injury or death.
CAUTION Failure to follow the instructions marked with this symbol could
result in minor personal injury or property damage.
■About symbols
The symbol indicates information which you should pay attention to (including danger
and warnings).
The symbol indicates information about prohibited procedures.
indicates "Disassembly is prohibited."
The symbol indicates information about obligated or instructed procedures.
indicates "Unplug the power plug from the outlet."

3
OPERATING PRECAUTIONS
The "products" shall collectively mean the printer, the AC adapter and the AC cable.
WARNING
Never attempt the following. Failure to follow the instructions leads to fire, electric shock, or accident.
DO NOT insert any foreign objects such as a piece of metal or any liquid into the products.
DO NOT touch the terminals of the products, power connector, AC plug, and DC plug.
To avoid short circuits, prevent terminals of the products, power connector, AC plug, and DC plug
from touching any conductor such as metal.
Take care not to spill liquid on the products.
DO NOT touch the products with wet hands.
DO NOT disassemble or reconstruct the products.
Use the printer only with the specified AC adapter and specified AC cable.
DO NOT use the AC adapter at a voltage other than the specified voltage.
Keep the terminals of the products, power connector, AC plug, and DC plug away from dust and
metal objects.
Make sure the AC plug and DC plug are securely plugged in when using the products.
DO NOT damage the AC cable, AC plug, and DC plug. DO NOT bend, pull, twist the cable
forcibly or place heavy stuff on it.
Be sure to observe the following instructions. Failure to follow the instructions may lead fire, electric shock,
or accident.
Be sure to use only in countries where the products meet the regulations.
Using non-compliant products may endanger the safety of products or be considered against
regulations.
Be sure to hold the plug when unplugging the AC cable from the outlet.
For wireless communication
Observe the following instructions.
Always turn off the printer in areas or regions where its use is prohibited, such as in an airplane.
The printer may affect medical or other electronic devices. Obtain information and data
concerning influence due to radio interference from each device manufacturer or dealer.

4
Procedures to take when in trouble
Follow the instructions in the following cases. Failure to follow the instructions may lead fire, electric shock,
or accident.
Turn off the printer, and unplug the AC plug from the outlet in any of the following cases:
◆Abnormal status continues.
◆The products are giving off an unusual smell, smoke, excessive heat or unusual noise.
◆A piece of metal, water or other foreign objects get into the products.
◆
The case is broken.
When the cable of the AC adapter or AC cable is damaged, unplug the AC plug from the outlet.
DO NOT use a damaged AC adapter or AC cable.
CAUTION
Observe the following instructions. Failure to follow the instructions may lead fire, electric shock, or
accident.
Turn off the printer and unplug the AC plug from the outlet when not in use for a long time or
before maintenance.
DO NOT use or store the products in the following locations:
◆Locations exposed to direct sunlight or high temperature.
◆Locations exposed to high humidity, a lot of dust, and liquid.
◆
Locations subject to strong vibration, or unstable locations.
DO NOT cover the products with a cloth when in use.
NEVER touch the thermal head immediately after printing because it may get hot. Be sure to allow
it to cool down before clearing a paper jam or cleaning the head.
The autocutter printer has an exposed cutter blade in the paper outlet. Do not insert fingers into
printer.
DO NOT touch the cutter blade directly while the top cover of the printer is open.
Keep loose objects such as long hair away from the printer while the printer operates. When they
fall into the printer, it may cause personal injury or damage the printer.
Keep the products away from infants and children.

5
3. OPERATING PRECAUTIONS
Be careful of the following precautions and use the products properly in order to deliver and maintain the
full performance of the products.
■Using Products
Precautions for use environment
◆Be careful not to drop or bump the products on a hard surface.
◆DO NOT install the products in direct sunlight.
◆Be careful about the ambient temperature and humidity.
Suitable environment for the use of the printer is as follows:
•Range of the temperature : 5°C to 45°C (41°F to 113°F)
•Range of the humidity : 10%RH to 90%RH (Non condensing)
See "15 SPECIFICATIONS" for the guaranteed humidity range at each temperature.
◆DO NOT install the products near devices that generate strong magnetism such as a copy machine
motor.
◆DO NOT install the products in a location that is subject to corrosive gas, siloxane and so on.
◆DO NOT connect the AC adapter or AC cable to the same outlet with devices that generate noise.
Precautions on use and operation
◆DO NOT print without the thermal paper.
◆DO NOT use thermal papers taped together.
◆NEVER forcibly pull out the thermal paper by hand with the thermal paper loaded.
◆DO NOT open the top cover during printing or cutting.
◆DO NOT connect or disconnect the interface cable during printing or communication.
DO NOT touch the plug of the interface cable during printing.
◆When handling the printer, be aware of static electricity. When the static electricity is discharged,
this could cause a USB communication failure.
When this problem occurs, disconnect the USB plug that is connected to the host device and wait a
few seconds before connecting it again.
◆DO NOT use the thermal head when it is wet. Doing so may damage the printer.
◆Printing under low temperature environment or printing at a high print rate might cause unclear
printing or generate loud sound. This is not a failure in the printer but an inherent paper
phenomenon.
◆When printing at a high print rate for longer length, even non-printing area may be colored due to
accumulation of heat in the thermal head.
Verify the performance with your actual device in advance.
◆Paper feeding may be confused a few dot-lines when printing is started or when printing and paper
feeding are resumed from a pause state. When printing bit images and so on, always feed the
thermal paper for at least 24 steps at the start of printing, and print without interrupting.

6
◆The AC adapter may get a little hot when in use. This is normal and not a malfunction.
◆Always use the specified thermal paper. See "16 ACCESSORIES AND CONSUMABLE PARTS" for
details.
◆DO NOT touch the thermal head directly. Doing so may result in poor printing quality due to the dirt
or damage by the static electricity.
◆NEVER touch the thermal head, paper sensor, or platen roller directly while opening the top cover
to install the thermal paper. Doing so may cause injury or other accidents.
◆Be careful not to get your fingers or hands caught in the printer when opening or closing the top
cover.
◆The autocutter printer has an exposed cutter blade in the paper outlet. Do not insert fingers into
printer.
DO NOT touch the cutter blade directly while the top cover of the printer is open.
◆In order to ensure the function and the safety of the product, be sure to observe the installation
direction.
◆DO NOT drop or insert any foreign objects such as clips, pins, and screws in the internal parts or
slot of the products.
◆DO NOT drop any liquid or spray a solvent to the products.
◆NEVER use sharp object such as pen tip to push the switch on the operation panel.
◆Make sure not to injure your body or other objects by the plate edge.
◆As the plated sheet steel is used in the printer, the edge face might rust.
◆When moving the printer from the installation site, hold the printer tightly with both hands, then lift it
upward slowly to leave the rubber feet from the installation surface. Lifting it rapidly or moving it
horizontally may peel the entire rubber feet, peel their surfaces, or damage the outer case.
◆When something goes wrong with the printer during use, stop using it immediately, and unplug the
AC plug from the outlet.
◆NEVER disassemble the printer without a serviceman.
Precautions for Wireless communication
◆The Wireless LAN model using IEEE802.11b/g/n operates in the 2.4 GHz frequency range, and
IEEE802.11a/n operates in the 5 GHz frequency range. So if these models are used around other
wireless LAN or any equipment using the same frequency range such as a microwave oven, radio
frequency interference may occur, and the communication may become unstable. When it happens,
turn off the interfering equipment or increase the distance. Alternatively, shorten the distance
between the host device and the printer as much as possible.
◆When operating the Wireless LAN model using IEEE 802.11a/n, the printer may stop
communication temporarily before outputting radio wave to the target channel not to affect the
weather radar, air traffic control radar or others. This is to monitor the presence of radar waves for a
certain time. If the printer detects radio waves such as radar during operation, it may switch to
another channel.
Precautions for maintenance
◆Clean the products' cases using a soft and lint-free cloth. DO NOT use alcohol or other solvent.
◆Before using, clean the terminals using a dry, soft, and lint-free cloth when they are dirty. If the
terminals are dirty, it may cause contact failure.
◆When cleaning the thermal head, always wipe it with a cotton swab or other soft material.

7
Precautions for storing
◆Turn off the printer when not in use.
In addition, when the printer is not used for a long time, unplug the AC cable from the outlet.
Moreover, set thermal paper to protect the platen.
■Thermal Paper Handling
◆Store the thermal paper in a cool, dry, and dark place.
◆DO NOT rub the thermal paper with hard objects.
◆DO NOT leave the thermal paper near organic solvents.
◆DO NOT allow PVC film, erasers, or adhesive tape to touch the thermal paper for long periods.
◆DO NOT stack the thermal paper with diazo copies immediately after copying.
◆DO NOT use chemical glue.
◆DO NOT use 2-ply thermal paper and perforated thermal paper.
■Precautions on Discarding
When discarding used products, discard them according to the disposal regulations and rules of each
district.
■Notation
The following 2 types of notation are used throughout this manual to denote operating precautions and
items to remember besides the symbols shown in "2. SAFETY PRECAUTIONS":
NOTE
◆Operating Precautions
This box contains items that may lead to a malfunction or deterioration of performance when not
followed.
HINT
•Items to Remember
This box contains helpful hints to remember when using the products.

8
4. PREPARATION
Make sure that the printer and its accessories are contained.
Keep the package and packing materials for future transportation or long-term storage.
Safety Precautions Quick Start Guide
Printer Sample Thermal Paper
AC Adapter AC Cable USB Cable*
*: USB model only
The available accessories are shown below. See "15. SPECIFICATIONS" and "16. ACCESSORIES
AND CONSUMABLE PARTS", and be sure to purchase our specified products listed on these
references.
AC Adapter AC Cable USB Cable

9
5. IDENTIFYING MODEL TYPE
The printer model is identified as follows:
SLP720RT-xK2Fx1
Series name
Interface
U: USB
E: Ethernet + USB
W: Wireless LAN
Country/Region
U: USA, Canada
E: EU, EFTA, UK, Turkey
J: Japan
1: Unspecified (other than Wireless LAN model)
◆When the printer is incorporated into your equipment and then supplied electric power from the
equipment, follow the rated value of input voltage for SLP720RT described in the printer
specifications of "15 SPECIFICATIONS".
◆When using a power supply other than the specified AC adapter, use a power supply at your own
risk under the safety standard and EMC regulations.

10
6. EACH PART OF PRINTER
1
2
3
4
5
6
7
8
11
10
9
12
13
16
14 15
15 14
14
15

11
1 POWER Switch
The POWER Switch turns the power on or off.
The LED lights when turning on the power. To
turn off the power, hold down the switch for longer
than 3 second.
2 FEED Switch
The FEED Switch operates paper feed. When
holding down the switch for a few seconds, the
printer feeds the thermal paper continuously for
the period of held.
3 LED
The LED lights when turning on the power. See
"LED Indication" on the next page for details.
4 Paper outlet
Thermal paper is ejected from here. The cutter is
attached.
5 Release lever
The lever is for opening the top cover to set the
thermal paper. It is also used to open the top
cover when a paper jam occurs.
6 Top cover
The thermal head is released from the thermal
paper when opening this cover. Open this cover
when replacing the thermal paper or cleaning the
thermal head.
7 Paper holder
The paper holder holds the thermal paper.
8 Thermal head
The thermal head prints data on the thermal
paper. NEVER touch the thermal head with
hands immediately after printing because it may
get hot.
9 Black mark sensor
The sensor detects thermal paper presence and
the black mark.
10 Taken sensor
The sensor detects the removal of thermal paper.
When Taken Mode is "Enable", the next printing
starts after removing the previous paper
remaining in the paper outlet. See "11
FUNCTION SETTINGS" for details.
11 Platen
The platen brings the thermal paper into contact
with the thermal head. The platen rotates to feed
the paper.
12 Cutter
The cutter cuts the thermal paper automatically
after printing. DO NOT touch the cutter blade
directly while the top cover is open.
13 Sheet metal parts
Make sure not to injure your body or other objects
as the sheet metals around the thermal head and
the cutter have sharp edges.
14 Power connector
The AC adapter is connected here.
15 Interface connector
The interface cable is connected here.
16 Product label
This label indicates the product name, rated
value, serial number, and the MAC address for
each product.

12
■LED Indication
Printer Status LED (Color)*1 LED
(Lighting Pattern)
Power off - Off
Power on (print-ready) /
Connecting Wireless LAN communication Green*2 On*2
Printing Green On
Waiting for test print Green Blink-2
Output buffer full Green Blink-1
Out-of-paper error Lime yellow Blink-1
Cover open error Lime yellow On
Hardware error Red On
Head temperature error Purple On
Voltage error Purple Blink-1
Cutter error Purple Blink-2
Not connected Wireless LAN communication Blue Blink-2
Paper removal waiting Blue Blink-3
Rewriting firmware White On
*1: The color tone may vary depending on the individual difference of the products and the viewing angle.
*2: The value at the shipping
■LED Blink Pattern
Status Pattern
Blink-1
Blink-2
Blink-3
0.2s
0.5s
0.1s
0.1s
0.7s
0.1s
0.1s

13
■Error and Recovery Procedure
When an error occurs, the printer stops printing operation. However, the data receiving is enabled. The
table below shows errors and their recovery procedures.
Error Detail Recovery Procedure
Priority*
Return-waiting
The printer becomes this
state after releasing
out-of-paper error, cover
open error, cutter error or
voltage error.
The return-waiting state is released
after about 1 second, and the printer
becomes print-ready state.
-
Output buffer full Output buffer of the printer is
full.
Read response data from the host
device. 1
Paper removal waiting Paper remains in the paper
outlet after cutting the paper.
Remove the paper from the paper
outlet. 2
Out-of-paper error There is no thermal paper. Open the top cover, load thermal
paper, and then close the top cover. 3
Cover open error The top cover is open. Close the top cover. 4
Cutter error Cut failure due to paper jam
at cutting.
Open the top cover to remove the error
cause and close the top cover, the
printer automatically recovers.
If the top cover is not open or the
printer does not automatically recover,
see "Clearing Cutter Error" in "9
PREVENTION AND TREATMENT OF
PAPER JAM".
5
Voltage error The power voltage is out of
the allowable range.
The printer automatically recovers
when the voltage is returned to the
allowable range.
6
Head temperature error Head temperature rises to
about 85°C (185°F) or higher.
The printer automatically recovers
when head temperature becomes
about 80°C (176°F) or lower.
7
Hardware error
An abnormality occurs in the
thermal head or the circuit
board.
Recovery is not possible.
Request for repair. 8
*: This indicates the priority when multiple errors occur simultaneously. The bigger number indicates higher priority.
For example, when "Cover open error" and "Out-of-paper error" occur simultaneously, the LED shows "Cover open error" which
has the higher priority.

14
7. POWER CONNECTION
To supply power to the printer, use the AC adapter.
Be sure to see "15 SPECIFICATIONS" for the AC adapter.
The AC adapter and the AC cable are optional accessories. See "15 SPECIFICATIONS" and
"16 ACCESSORIES AND CONSUMABLE PARTS", and be sure to purchase our specified products
listed on these references.
■Connecting AC Adapter
Connect the AC cable to the AC adapter.
Plug the DC plug of the AC adapter to the power connector of the printer.
Pull
How to unlock the DC plug
Plug the AC plug of the AC cable to an outlet.
NOTE
◆Plug the DC plug into the power connector of the printer in the correct orientation.
When plug the DC plug forcibly in wrong orientation, it may cause damage.
◆Unplug the AC plug of the AC cable from the outlet when inserting or pulling out the
DC plug.
◆The printer power connector has the locking system.
Pull the DC plug to the opposite direction of the arrow shown in the front side of the
DC plug to unlock.
Unlock the DC plug as shown in the figure before disconnecting it.
◆When the printer is not used for a long time, unplug the AC plug of the AC cable from
the outlet.

15
8. LOADING THERMAL PAPER
The printer uses the thermal paper roll (hereinafter referred to as thermal paper).
Use the thermal paper with printing surface rolled outwards.
The function settings of the printer differ depending on the thermal paper. See "11. FUNCTION
SETTINGS" for details.
■Adjusting Paper Width
Pull the release lever of the printer upward and open the top cover.
Slide the paper guide while pulling the lever of the paper guide upward.
NOTE
◆Set the paper width before using the printer for the first time. DO NOT change the
paper width after starting to use the printer. Doing so may damage the printer.
◆When the thermal paper smaller than 58 mm in width is used, rubber crumbs of the
platen may be generated because the platen contacts with the thermal head. Remove
rubber crumbs regularly to maintain the printing quality.

16
■Loading Thermal Paper
Pull the release lever of the printer upward and open the top cover.
Take the glued end from the thermal paper.
Load the thermal paper into the paper holder.
NOTE
◆DO NOT touch the cutter blade directly.
◆Make sure not to injure your body or other objects as the sheet metals around the
thermal head and the cutter have sharp edges.
Pull the thermal paper straight. Make sure that the thermal paper does not slant.