NBK EPU-220 User manual

WirelessPositioningUnits
InstructionManual

1
Introduction
We wish to thank you for purchasing Wireless Positioning Units (EPU-220) from NBK.
Carefully read this manual to ensure proper operation.
"1. Safety Precautions" is an especially important section. Be sure to fully understand the contents
of that section before use.
Store this manual in a location where it can be readily accessed when actually needed.
Use of this Product
This product is designed for general industrial applications such as feed screw driving.
Do not use this product for applications in which improper use or failure could result in death or
injury, or applications in which failure could result in serious public damage or similar negative
e󱐯ects.
・Contact us if you are considering a special use of this product.
・Incorporate and install failsafe functions (emergency stop, monitoring, and similar devices) if
using this product in equipment that could cause a serious accident or loss.
About Disposal
When disposing this product, follow the rules and regulations of the corresponding local
government and dispose of it as industrial waste.
© 2021- Nabeya Bi-tech Kaisha Co., Ltd.
Copying or reprinting all or part of this document in any manner without permission is strictly
prohibited.
Some of the specications described in this document are subject to change without notice
due to product improvements.
Explanation of Symbols
Specic information is indicated in written form near each symbol.
Indicates supplementary written explanation and useful information.
Indicates the reference page(s) in this or related instruction manuals.

2
Introduction
Check the Packaged Items
Main unit (x1) Hex socket set screw Simple Guide
Model: EPU-220 M5x6 (x1)
Instruction Manuals for Wireless Positioning Units
Prepare the following manuals according to the products you have purchased.
All of the following PDF instruction manuals can be downloaded from our product page:
https://www.nbk1560.com/en-US/products/mechatronics/positioning_unit
● Transceivers
・EPC-100 ・EPC-200-CC ・EPC-210-EIP
● Dedicated software for wireless positioning units
・EPU-COM
● Repeater hubs
・EORP-200
EPU-COM

3
Contents
Introduction 1
1 Safety Precautions 5
1.1 Essential Precautions 5
1.2 Precautions Related to Installation and Wiring Work 6
1.3 Precautions Related to Operation and Inspection 8
2 Overview 9
2.1 Product Overview 9
2.2 Part Names and Functions 11
2.3 Button Operation and Mode Transitions 12
2.4 Indicator LED Lighting Patterns 13
2.5 Block Diagram 14
3 Specications 15
4 Installation and Connections 17
4.1 Installation Requirements 17
4.2 Unit Installation 18
4.2.1 Installation of Unit Alone 18
4.2.2 If Using the Mounting Plates (Optional) 19
4.2.3 If Using the Collars (Optional) 22
4.2.4 If Using the High Torque Adapters (Optional) 24
4.2.5 If Using the High Torque Adapters and the Mounting Plates for High Torque
Adapters (Optional) 27
4.2.6 If Using the High Torque Adapters and the Collars for High Torque Adapters
(Optional) 30
4.2.7 Allowable Load 31
4.3 Connections 32
5 Maintenance 36
5.1 Precautions for Inspection 36
5.2 Inspection Checklist 36
6 Troubleshooting 37
7 Dimensional Outline Drawings 38
8 Radio Wave and EMC Precautions 40
8.1 Radio Wave Precautions 40
8.2 EMC Precautions 41

4
9 Laws and regulations 42
9.1 Japan (Technical Conformity Mark) 42
9.2 EU (CE) 43
9.3 USA (FCC) 44
9.4 Canada (ISED) 45
9.5 Korea (KCC) 46
9.6 Taiwan (NCC) 47
10 Warranty 48
Revision History 50
Contents

5
1.1 Essential Precautions
To ensure safety, please thoroughly read the following precautions and understand correctly before
using this product.
(1) When setting up a system that includes wireless positioning units, be sure to confirm the
specifications of each equipment and device used in the system, and make sure that they are
operated within their specied ratings and performance limits. Be sure to implement appropriate
safety measures such as installing a safety circuit that minimizes danger even in the event of a failure.
(2) To ensure safe operation of the wireless positioning units, be sure to thoroughly read the Safety
Precautions for each equipment or device used in the entire system.
(3) Customers are requested to confirm all standards and regulations that apply to the wireless
positioning units.
(4) Improper handling or misuse may lead to an accident or shorten the service life of the product.
(5) Unless otherwise stipulated by law, we shall not be held liable for any damages resulting from
improper use by the customer or a third party, failures that occur during use, other defects, or
damages caused by the use of this product.
Safety precautions in this manual are classified as indicated below in order to prevent personal
damage, and damage to the units and peripheral equipment.
Specic safety precautions are indicated in written form near each
WARNING and CAUTION symbol.
WARNING
Indicates that improper handling can lead to a dangerous
situation that may result in death or serious injury*1.
CAUTION
Indicates that improper handling may lead to minor injury*2
or damage to this product or peripheral equipment.
*1: "Serious injury" refers to loss of eyesight, injury, burns, electric shock, broken bone, poisoning, and similar injuries that have
aftere󱐯ects, and require hospitalization or long-term treatment in order to recover.
*2: "Minor injury" refers to injuries, burns, electric shock, and similar injuries not requiring hospitalization or long-term treatment in
order to recover.
Specic information is indicated in written form near each symbol.
PROHIBITED
Indicates a prohibited action.
Never perform any prohibited work or action.
COMPULSORY
/ INSTRUCTION
Indicates the action is mandatory
and must be performed.
Perform the compulsory work/action as indicated.
1 Safety Precautions

6
1 Safety Precautions
1.2 Precautions Related to Installation and Wiring Work
WARNING
COMPULSORY
/ INSTRUCTION
[Perform as Indicated in Order to Prevent Injury, Electric Shock, Fire, and Failure]
・Be sure to install the product in a safe and secure manner to prevent re or accidents in
case of an earthquake.
・Ensure that wiring work is performed after installation and the power supply terminal
connections are properly insulated.
・Be sure to install an external emergency stop circuit so that operation is immediately
stopped and the power is shut o󱐯 in the event of an abnormality.
・If there is a potential for danger during a stoppage or a product failure, be sure to install
an external brake for holding the product.
PROHIBITED
[Prohibited Actions in Order to Prevent Injury, Electric Shock, Fire, and Failure]
・Make sure that the power supply and other cords are protected from damage.
・Ensure that fragments of metal cannot enter the product, it is protected from splashes of
water, and it is always kept dry.
・Do not perform wiring work with wet hands.
・Do not install the product in a place where it will be exposed to violent vibration or
shock.

7
1 Safety Precautions
CAUTION
COMPULSORY
/ INSTRUCTION
[Perform as Indicated in Order to Prevent Injury, Electric Shock, Fire, and Failure]
・Ensure that the wiring work is correctly performed and install according to the specied
procedure.
・Be sure to use a DC power supply (+24 V) that provides stable operation to power a 24
VDC SELV circuit.
・When wiring up a SELV circuit for the power supply (+24 V), pay particular attention to
the polarity of the terminals.
・Be sure to securely connect the SELV circuit so that it will not detach o󱐯 or be loose.
・Install the product in a location with an ambient temperature ranging from -5 to 55°
C (23 to 131°F) (no freezing) and an ambient humidity ranging from 20 to 85% RH (no
condensation).
・Check and adjust all settings before operation in order to prevent unexpected operation.
・Precisely adjust the alignment of the output shaft and the mating device.
・Be sure to install the product in an appropriate environment that satises its required
specications such as main unit mass and rated output.
[Perform as Indicated in Order to Prevent Other Damage]
・Install the product in a location that allows an appropriate work space for operation,
adjustment, and maintenance.
・Since electrical noise may be generated by the PWM control system, be sure to
implement countermeasures for peripheral equipment subject to noise. Be sure to also
fully consider the installation environment as the units themselves may be a󱐯ected by
external noise.
PROHIBITED
[Prohibited Actions in Order to Prevent Injury, Electric Shock, Fire, and Failure]
・Do not use the product outdoors or in places where it may be exposed to direct sunlight
(UV rays).
・Do not use the product in places with a generation of static electricity.
・Ensure that the output shaft is not subject to strong impacts or loads that exceed the
allowable load.
・Do not directly connect the product to an AC power supply.
・Do not apply voltage with any power supply other than that specied.
・Do not stack the product.
・Do not grip cables or the output shaft when moving the product.
・Avoid strong impacts or other damage.

8
1 Safety Precautions
1.3 Precautions Related to Operation and Inspection
WARNING
COMPULSORY
/ INSTRUCTION
[Perform as Indicated in Order to Prevent Injury, Electric Shock, Fire, and Failure]
・When an error occurs, remove the cause, and check safety before restarting operation.
・Persons with a pacemaker must maintain the proper distance of separation from this product.
・Be sure to perform maintenance and inspection on a monthly basis and ensure that
adequate space is provided for such work.
・Provide appropriate measures such as enclosures to protect workers from impacts
during operation, adjustment, and maintenance work.
PROHIBITED
[Prohibited Actions in Order to Prevent Injury, Electric Shock, Fire, and Failure]
・Do not disassemble, repair, or modify the product.
・If you observe a failure, immediately shut o󱐯 the power supply and do not turn it back on.
・Do not move, inspect, or perform wiring work while the product power is on.
・Do not handle ammable gas in the vicinity of the product.
・Do not touch the output shaft during operation.
[Prohibited Actions in Order to Prevent Burns]
・Do not touch the units while they are powered on or soon after the power has
been turned o󱐯 as they may be extremely hot.
CAUTION
COMPULSORY
/ INSTRUCTION
[Perform as Indicated in Order to Prevent Injury and Failure]
・Be sure to turn o󱐯 the power if you plan on not using the product for an extended period of time.
PROHIBITED
[Prohibited Actions in Order to Prevent Injury, Fire, and Failure]
・Do not continue to use the units if they have been damaged.
・Do not frequently turn the power on and o󱐯.
・Do not continuously operate the product for an extended period of time.
・Do not approach the equipment when a power failure occurs due to the possibility of
operation suddenly restarting when the power is restored.
[Prohibited Actions in Order to Prevent Unstable Operation]
・Do not make any drastic adjustments or changes.
・Do not stand on or place heavy objects on top of the product.

9
2 .1 Product Overview
Wireless Positioning Units (EPU-220)
This unit automates the positioning mechanism of the feed screw. By
replacing the feed screw operation handle with the unit, it automates
the positioning mechanism of various devices and equipment.
Optional
Mounting Plates (EOAP-200)
If replacing the digital position indicator and handle attached
to a machine with a wireless positioning unit, you can use the
positioning pin hole for the digital position indicator of the
machine as-is to mount the wireless positioning unit.
Collars (EOCL-200)
The wireless positioning unit shaft hole diameter can be changed to
match the rotating shaft.
High Torque Adapters (EOAT-200)
Allows you to decelerate the rotating speed and amplify the torque of
the wireless positioning units.
Mounting Plates for High Torque Adapters (EOTAP-200)
If replacing the digital position indicator and handle attached to a
machine with a wireless positioning unit and high torque adapter, you
can use the positioning pin hole for the digital position indicator of the
machine as-is to mount the high torque adapter.
Collars for High Torque Adapters (EOTCL-200)
The high torque adapter shaft hole diameter can be changed to match
the rotating shaft.
2 Overview

10
2 Overview
Connection Example Part Names and Functions
CC-Link is a registered trademark of Mitsubishi Electric Corporation and EtherNet/IPTM is a
registered trademark of ODVA, Inc.
This is an open network for industrial use that enables communication between devices of
many di󱐯erent manufacturers.
Transceivers
EPC-200-CC/
EPC-210-EIP
PLC
EPU-COM
PCequipment
RS-485cable(2-wiretype)
USBcableconnection
Wirelessconnection(2.4GHz)
Wiredconnection
Allowsupto32connections
*Usedforinitialsettingsand
controllingtheproductfromaPC. Units
EPU-220
Units
EPU-220

11
2 Overview
2.2 Part Names and Functions
Reading Product Numbers
EPU-220-A-BL
Series name
EPU-220: Wireless Positioning Units 220 Series
Cable end specications
A: Loose wires
B: Connector
Case color*
BL: Blue
BK: Black
*You may not be able to specify a case color.
Powersupply/Communicationcable
Cableusedforthesupplyof24VDCpowerand
wiredcommunication
Cableendspecifications
A:Loosewires B:Connector
SampleProductNameplate
Serialnumber
*Theconformitymarkingsshownmayvary
dependingontheparticularproductnumber.
Specifications ProductNo.
Conformitystandard
IndicatorLED
Displaysthecurrentstatus
oftheunit
Outputshaft
Drivestherotatingshaft
Abutton
Bbutton
Settingsbutton
Allowsyoutorotatetheoutputshaft
inmanualoperationsandswitch
betweenvariousmodes
①
③
②
Thisproductconformstothefollowingstandards:
①FCCmark:USstandards
②NCCmark:Taiwanstandards
③KCmark:Koreanstandards
*

12
2 Overview
2.3 Button Operation and Mode Transitions
Operate the buttons on the front of the unit to rotate the output shaft and change modes.
Pressand
hold
ManualOperationsMode
Lightsupingreen→white Flashesinwhite
UnitRegistrationSelectionMode
Pressandholdthe
buttonfor3sec.ormore
Green→White→Yellow
↔Blue(flashesalternately)
Press
Press
Lightsupinblue
Lightsupinyellow
Press
Press
Terminating
resistorsetting
"ON"
Terminating
resistorsetting
"OFF"
TerminatingResistorSettingMode
Green→Lightblue
↔
Purple(flashesalternately)
Flashesinpurple→
Green(Normalmode)
Flashesinlightblue→
Green(Normalmode)
Switchestheterminatingresistorsettingon/off.
Factorydefaultsettingsare-A(loosewirestype)issetto
"OFF"and-B(connectortype)issetto"ON".
Selecteitherwirelessorwiredunitregistration.
Thisisthestandbystatusof
setupexecution.
Waitapproximately
10sec.(nooperations)
aftercompletingsettingsor
pressthebutton
Waitapproximately10sec.
(nooperations)orpressthe
button
Pressthebutton
Afterunitregistrationis
completedorpressthe
button
Pressandholdthe
andbuttonsatthe
sametimefor3sec.or
more
NormalMode
Lightsupingreen
*Formoredetailsregardingtheunitregistration,pleaserefertotheDedicatedSoftware(EPU-COM)InstructionManual.
WirelessUnit
RegistrationMode
WiredUnit
RegistrationMode
Pressand
hold Outputshaftrotates
intheCWdirection
Outputshaftrotatesin
theCCWdirection
Flashesinwhite

13
2 Overview
2.4 Indicator LED Lighting Patterns
Unit status Color Pattern
Normal mode Green Standby: On, Setup execution: Flashing
Manual operations mode White Standby: On, Manual operations: Flashing
Unit registration selection
mode
Yellow
and
blue
Standby: Alternate ashing
Wireless unit registration
mode Blue Standby: On
Wired unit registration
mode Yellow Standby: On
Terminating resistor
setting mode
Purple
and
light blue
Standby: Alternate ashing
Error Red Error: On, Failure: Flashing

14
2 Overview
2.5 Block Diagram
CPU
WirelessPosition㏌gUnits(EPU-220)
RS-485
Terminating
resistor
Lowvoltage
detection
circuit Abutton Bbutton Sett㏌gs
button
󴅡iver
MotorEncoder
Current
detection
circuit
Temperature
detection
(Thermistor)
Memory
Wireless
communication
module

15
Wireless Positioning Units (EPU-220)
Power supply voltage 24 VDC ± 10%
Current
consumption
Standby 20mA
Rated 0.6A
Max. 1A
Rated output 5W
Rated rotational speed 60 ± 10rpm
Rated torque 0.8 N m (7.07 lbf in.)
Continuous operable time Not exceeding one minute*1
Allowable
output shaft
load
Radial load 19.6 N (4.4 lbf)
Thrust load 19.6 N (4.4 lbf)
Output shaft holding torque 0.7 N m (6.19 lbf in.)※2
Stop accuracy ±5°
Input
Wireless communication 2.4 GHz wireless communication
Wired communication RS-485 (2-wire type)
Wireless transmission output 6.3 mW
Wireless operation frequency 2405 – 2475 MHz
Wireless
communication
distance
(reference value)
Indoors 60 m (200 ft)
Outdoors 1,200 m (3,900 ft)
IP code IP65
External dimensions
(excluding the power cable and protrusions)
45 mm x 150 mm x 45 mm
(1.772 in. x 5.906 in. x 1.772 in.)
Mass Loose wires: 304 g (10.72 oz)
Connector: 338 g (11.92 oz)
*1: Allow around ten minutes for cooling after a period of continuous use.
*2: This value should be taken only as a reference and is not guaranteed.
3 Specications

16
3 Specications
Operating Environment
Operating
environment
Temperature -5 to 55°C (23 to 131°F) (no freezing)
Humidity 20 to 85% RH (no condensation)
Pollution degree rating 3
Elevation
No greater than 2,000 m (6,600 ft) above sea level
High Torque Adapters (EOAT-200) (Optional)
Product No. EOAT-200 -4 EOAT-200 - 8
Reduction ratio 4 8
Rated torque 2.7 N m (23.8 lbf in.) 5.4 N m (47.7 lbf in.)
Output shaft rotation direction Same direction as input shaft
Allowable output
shaft load
Radial load 190 N (42 lbf)
(10 mm (0.394 in.) from mounting surface)
Thrust load 155 N (34 lbf)
Output shaft holding torque 2.5 N m (22.1 lbf in.)*1 5 N m (44.2 lbf in.)*1
Backlash 1° or less
Mass 359 g (12.66 oz) 361 g (12.73 oz)
*1: This value should be taken only as a reference when mounting the wireless positioning units and is not
guaranteed.

17
4 Installation and Connections
4 .1 Installation Requirements
The environmental conditions for installation are shown below.
・An indoor environment.
・A place where it is not exposed to direct sunlight (UV rays).
・A place free of continuous vibration.
・An installation surface that has su󱐰cient strength.
・An environment that facilitates the dissipation of heat.
・A place that allows easy inspection and cleaning.
・A location with an ambient temperature ranging from -5 to 55°C (23 to 131°F) (no
freezing) and an ambient humidity ranging from 20 to 85% RH (no condensation).
・Avoid environments where it is immersed in water, corrosive atmosphere, ammable gas,
harmful gas, or near ammable materials.
・Since electrical noise may be generated by the PWM control system, be sure to implement
countermeasures for peripheral equipment subject to noise. Be sure to also fully consider
the installation environment as the units themselves may be a󱐯ected by external noise.
・Carefully read "1.2 Precautions Related to Installation and Wiring Work" and install correctly.
Refer to P. 6.
・Please contact our Customer Service if using in a special environment or application.
Refer to P. 48.
Wireless communication distance varies depending on installation and connection conditions.
The communication distance may be shorter under the following conditions.
・Obstacle in the transmission path (Rebar, reinforced concrete, etc.)
・Height di󱐯erence in the transmission path
・Installed position is close to the ground
・Metal present nearby
・A lot of radio wave noise in the vicinity

18
4 Installation and Connections
4.2 Unit Installation
4 . 2 .1 Installation of Unit Alone
1
Drill ① Holes for the positioning pins
through the mounting surface of the
machine.
Mount the ② Rotating shaft so that
it protrudes out from the mounting
surface as shown in the diagram.
・ Provide one of the two positioning pin
holes with a slot shape (long hole) as
shown in the gure. If machining a slot
shape is di󱐰cult, drill out a Φ6 (0.236)
or larger round hole.
・Be sure to maintain the amount
of protrusion of the rotating shaft
mounted to the unit output shaft at
34 mm (1.339 in.) or more.
2
Pass the rotating shaft through the ③
Unit's ④ Output shaft and insert the ⑤
Positioning pins into the holes drilled in
step 1.
3
Secure it in place with the included ⑥
Hex socket set screw (M5x6).
(Recommended tightening torque: 2.8 N m
(24.7 lbf in.))
16.5±0.1
33±0.1
R
min.34
(0.197)
+0.004
0
+0.1
0
5
①Positioningpinholes
②Rotatingshaft
6(0.236)ormore
②Rotating
shaft
Holedepth
4(0.157)ormore
①Positioning
pinholes
Φ5 +0.1
0
(Φ0.197)
+0.004
0
(1.339)
(1.299±0.004)
(0.65±0.004)
Unit: mm (in.)
④Outputshaft
③Unit
⑤Positioningpins
⑥Hexsocket
setscrew

19
4 Installation and Connections
4.2.2 If Using the Mounting Plates (Optional)
The mounting plates can be used when replacing digital position indicators with a size of 22 mm
(0.866 in.) as shown in Fig. 1 or 30 mm (1.181 in.) as shown in Fig. 2.
Corresponding Positions of Positioning Pin (Unit: mm (in.))
Position of positioning pin
Size Digital position indicators Mounting plates
22 mm
(0.866 in.)
Fig. 1
22(0.866)
Φ6(0.236)
max.Φ20(0.787)
30 mm
(1.181 in.)
Fig. 2
Φ6(0.236)
30(1.181)
max.Φ20(0.787)
Turn the positioning pin to the left and
remove by using a flathead screwdriver or
similar, and change the position.
(Recommended tightening torque: 0.3 N m
(2.65 lbf in.))
Positioningpin
22(0.866)
Positioningpin
30(1.181)
This is the position when shipped from the
factory. Check that the positioning pin is
tightened before use.